Revision Date Changes
12 May 2017 Adjustment and revision for mRay 5.1
13 July 2017 Adjustment for mRay 5.2

Manufacturer and contact

mbits imaging GmbH

Bergheimer Straße 147

D-69115 Heidelberg

E-Mail: support@mbits.info

Telefon: (+49) 6221-6734 883

Internet: www.mbits.info

mRay 5.2

Radiological image viewer for mobile devices with image processing functions

Release-Date: July 2017

© 2017 mbits imaging GmbH

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Intended purpose

mRay allows medical professionals to view and evaluate radiological images. Main users are physicians. The patient group, for which mRay can be used, includes all patients from whom radiological image data has been created for the purpose of diagnosis or treatment.

mRay can be operated in hospitals, medical practices, on the go or at home. The software is dedicated for mobile devices for fast and immediate access to radiologic images for informational purposes. When using mRay for diagnostic purposes, national regulations within the European Union must be considered and an appropriate display must be used.

mRay allows the display of images and data types that are defined by the Digital Imaging and Communications in Medicine (DICOM) standard (e.g. computed tomography (CT), magnetic resonance imaging (MRI), positron emission tomography (PET), fluoroscopy (XA), digitalx-ray (CR), ultrasound (US)). The software offers common radiological software tools (e.g. windowing, measurements, thick slices and annotations).

Overview

mRay is a mobile viewer application for radiological images. It supports DICOM image files as well as other common image formats and PDF files. The the major functions of use are:

  • Receive DICOM data per pre-defined communication setup by Picture Archiving And Communication System (PACS)
  • Overview about all available patients, including a search function (name, birth date,imaging modality)
  • Selection of to be reviewed DICOM data to download an entire set of data (multiple patients, multiple studies or multiple series) 
  • Visualization of the DICOM data in a well-established way of DICOM viewing (analogous standard tools for medical image viewing)
  • Assessment of DICOM data by means of standard navigation tools (level window, panning,zooming, etc.)
  • Take pictures for wound documentation and send them as a DICOM file to your PACS including all necessary meta information
  • Calibration routine to adjust the display of grey vaules on a device - DICOM Greyscale Standard Display Function
  • Create simple textual reports and store them as a DICOM file
  • Load and create level window presets
  • Manual measurement of structures of interest on 2D slices including angular and length measurements as well as statistical computations in a region of interest
  • Adding text annotations to images
  • Multiplanar reconstruction for CT datasets (MPR)
  • Thickslices by means of maximum intensity projection for up to 11 slices (MIP) 
  • Browse PACS by DICOM Query (C-FIND) 
  • Request data by DICOM Retrieve (C-MOVE)
  • Encryption and compression of data stored/transmitted
  • Sending messages / images / key images to colleagues, which are shown in a contact list

Operating the application

Welcome screen

The welcome screen appears as soon as the application has been started (Figure 1). You can connect to Demo Server with the button. Additional text fields for username and password appear after the user has specified a server address. If the login data is correct you will be directed to the main screen of the application. Please contact your administrator to get the server address and your login credentials. Enter your login credentials to log in.

Please take note of the following hints for use of mRay

  • If it is your first login it could  take a little time („Connecting“ is written in the status field) – dependent on your connection speed.
  • By clicking and holding a button you can call the interactive help . Thus you can find out every functionality behind a button anytime.  
  • If a PIN code is necessary on your device, you'll stay logged in for a specific period, which means you don't need to enter your login credentials every time you start the app. The period can be adjusted by your admin. 
  • Please set the correct date and time on your device when you are using mRay. 

Figure 1

  1. Server URL field: specify the URL of the server here. Port can be omitted if default port 32000 is being used for the server installation.
  2. Server URL drop down list: Opens a list of all servers that the application was connected with. Entries can be deleted by swiping them from left to right.
  3. User ID field: Enter your user name in this input field.
  4. User ID drop down list: Opens a list of all users who were connected to the currently selected server.Entries can be deleted by swiping from left to right.
  5. Password input field: Enter your password in this input field.
  6. Connection status: shows your current connection state.
  7. Login button: Tap this button to log in.

PIN Check

A PIN check will be neccesarry when logging in with an ActiveDirectory account for the first time. The PIN will be send to the mail address registered in your ActiveDirectory account. The keyboard can be opened by tapping on the input field (2 Figure 1.1). The PIN will be validated immerdiantly after entering the sixth digit.

1

2

3

Figure 1.1

The PIN dialog features the following UI elements:

  • Notification including the mail address the PIN has been sent to.
  • The PIN input field. The keyboard will open by tapping on the input field.
  • You can close the PIN dialog by tapping on the close button. This will cancel the login process.

Inbox

The inbox will be opened after logging in (Figure 2). With this you can browse and select the wanted DICOM files, which are enabled for you through the server.  Thus you can see all files on the mRay server on which you have access rights.

Figure 2

The following functions are available on this screen: 

  1. A green icon shows, if you are connected to the server. In case of a red icon you can work with the local saved files, but of course you can't receive new files. By clicking the mRay logo you can open the main menu. 
  2. Switch to the Messaging/Chat menu (see below - only if this function has been activated in your system). 
  3. Switch to the PACS query dialog - only if this function has been activated in your system. (See section below)
  4. Shows information, missing information and meta data from a patient. 
  5. Switch to Favorites: It is possible to mark your favorites with the star symbol (Item 8). Favorites are working as a kind of bookmark and  and they will be deleted last by the automatically storage management of the application (which means your favorites will only be deleted if it is necessary due to your settings to the data retention or due to low space on your device). 
  6. The time will appear as soon as the data arrived in the mRay (by sending out of the PACS and searching in the PACS). mRay can be configurated to automatically delete data after 'X' hours (default: after 8 hours). 
  7. Studies of patients are shown here. By clicking a study you will get to the series selection (see below). The green marker indicates that the image data is stored locally.
  8. You can also mark a single series as one of you favorites (bookmark). See item 4.
  9. Here you can filter your inbox by text entry. Please note: by filtering you don't start a PACS query! See item 3 for PACS queries. Please also mind the notes to special characters in the 'known issues'.
  10. Take a photo: see section for secondary capture for further explanations

Scrolling through long lists

Swipe up/down to scroll through lists or use the scrollbar on the right of a list to navigate quickly through them.

Hide entries in the inbox

By swiping right within a list container you are able to hide single study or series. Those won't appear in the list anymore. To view hidden datasets you need to click the button 'show hidden datasets' in the settings. Hide all data at once by executing the gesture with three fingers at the same time.

Figure 3

Series selection

By clicking a study in the inbox you will get to the series selection (Figure 4). 

Figure 4

The following functions are available: 

  1. Back to the inbox 
  2. Enumeration of all recorded images of the study of a patient. These additional information are enumerated:
    • Series description
    • Series ID
    • Recording mode (CT, MRT, CR, XA, US, …)
    • Number of the slices/frames (optional)
    • Recording date of the series
    • When was the dataset added to the pool
    • Solution of the dataset
    • Measures of the image

If the messaging function is enabled you are able to share a series by clicking and holding it for a while (Figure 5). 

Figure 5

  • You can select and share several series or deselect them.
  • By clicking the 'share' button you are able to send the selected dataset to one of your contacts. The contact list will be opened, so you can select a contact. All selected series will be sent to this contact (a chat screen opens with single series messages).
  • Abort.

The main menu will be opened after clicking the mRay logo (Figure 6).

Figure 6

The following functions are available: 

  1. Shows the currently logged in user.
  2. You can log out with this button. You'll get back to the log in screen and you are disconnected from the server. This function is needed, if another user wants to log in on this device.
  3. URL of the server you are currently connectet to. If there is a download in progress you can see the current download speed here.
  4. Opens the settings screen (see the next chapter).
  5. DICOM Switch between default calibration settings, custom calibration or turn it off. The calibration routine will appear if you have not calibrated the display yet. See section Calibration routine for further details about the calibration of the display.
  6. Opens the 'About mRay' dialog
  7. Opens the 'Whats new?' dialog
  8. Opens the imprint.

Settings

On this screen you can adjust your settings just as you want (Figure 7). 

Figure 7

The following functions are available: 

  1. Notifications: adjust what kind of notifications you want to receive. You can choose between none, notifications for messages only or notifications for messages and new datasets
  2. Autodownload: in mRay there is a  autodownload feature, which downloads new arriving datasets automatically. You'll recieve a note as soon as the datasets are available. Also you will have access to the image data immediately by opening the app. This function needs to be enabled by your admin. With the menu unter item 1 you can also decide, whether you want to download data via wifi exclusively (default setting) or via wifi and your mobile connection. You can also fully disable this function on the device. 
  3. Max. occupancy: the maximum storage mRay can occupy on your device. 
  4. Used: shows the currently used disk space which mRay is using.
  5. Delete: deletes all local saved files (a confirmation dialog will appear).
  6. Show hidden datasets: Views all datasets, which you have hidden before in the inbox.
  7. Calibrate DICOM curve: opens the calibration routine
  8. Change password: Through this button you will get to the 'Change password' screen, on which you are able to change your password by typping your old password and a new one, without contacting the admin.

Change password

By using the 'Change password' screen you are able to change your personal account password, without contacting your admin. The following figures will visualize the procedure

Figure 8

The following items will show you the functionality of this screen:

  1. Your old password is needed in this input field. That's necessary to protect your account from foreign access.
  2. Insert your new password in this input field, which will be valid as soon as the change is successful.
  3. To prevent typing errors you need to insert your new password again in the next input field.
  4. This indicator shows how strong your new password is on a scale from 0 to 100 percent. 0 means very weak and 100 means very strong. The traffic light colors are also an indicator about the strength of your new password.
  5. By clicking this button you accept the input and your password is changed. It requires a connection to the server to get the changed password to every device. The button will be enabled as soon as all input fields are valid.

Note

Please take care that you are able to type all the special characters via your touch devices, if you want to use special characters in your password. Otherwise you have no opportunity to log in. If you use special characters by a mistake and are not able to log in anymore, please contact your admin to reset your password.

DICOM Standard Display Function calibration routine

This routine is used to calibrate your display to be in accordance with the DICOM Standard Display Function (GSDF). You need a luminance measuring device to perform the routine. The routine consists of displaying the image of the TG18 group. Measure the luminance of the displayed square (1) and enter the value with either (6), (2) or (3). Click 'Accept' to proceed to next image / step. After all TG18 images have been processed the calibration results will be stored and applied to the visualization of images.

Figure 9

  1. Grey value valid to be measured.
  2. Adjusts the entered luminance value
  3. Adjusts the entered luminance value
  4. Go back to previous image
  5. Accept value of this step and proceed to next step
  6. Slider to enter measured luminance value
  7. Discard the current calibration

The following points need to be checked before the test:

  • The device's display brightness is set to its maximum value.
  • The image viewing device should be used in an evironment which is in compliance to the desired roomclass.
  • The display should be cleaned.

Capture images as DICOM Secondary Capture

With the Secondary Capture feature you are able to take a photo with your mobile device camera. This feature was designed for wound documentation for example. By saving a photo it will be uploaded to the PACS if your server license does include this feature. The photo will be added as a new study to the inbox. The button to take a Secondary Capture photo is viewed in the lower right corner of the inbox as a camera icon and will lead you directly to the camera view. Taking a photo will show the following window as you can see in Figure 10. Saved photos will not appear in your devices gallery and are only stored internally in mRay on your device.

Figure 10

  1. Using the search field will return you a list right with all the patients who are matching the characters you typed so far. This provides a quick finding of already existing patients. As you select one of these patients the other text fields will be automatically filled with the corresponding information. If you are not using the search bar you can also fill in the information manually.
  2. Tapping this button will change the patients gender. You can select 'male', 'female' and 'other'.
  3. To discard the photo tap the "discard"-button.
  4. Saves the photo. By saving a photo it will be uploaded to the PACS. Also it will be availabla as a new study in your inbox.

For adding more than one photo for a single patient you can use the buton (1) shown in the following figure to recall the information of the previous image. To add photos to an existing study just ensure the study description is the same as the study where the new photo should be added.

Figure 11

Warning

Although it is possible to use measurement tools on Secondary Capture photos, please notice that the values you'll get returned are probably wrong.

Messaging

With the messaging function (Figure 12) you are able to send and recieve messages and datasets/key images to your contacts and groups. 

Figure 12

The screen provides the following functions: 

  1. Click to open the chats with a contact.
  2. Click to open the chat of the chat room for group Radiology
  3. Preview of the last messages in the chat.

Chat

Just as known from other messaging applications it is possible to send and recieve messages (Figure 13). Additionally it is possible to share series, key images and sending audio messages. 

Figure 13

This screen provides the following functions: 

  1. Back to the overview.
  2. Chat course: Available series and key-images (key icon above the preview image) can be opened by clicking it. Please notice: If you have no access rights for an image a corresponding error message will be displayed.
  3. Input field to type your text messages. By clicking the 'microphone' button you can stard recording your audio message and send it to the reciever (see chapter 'audio messages').

Photo messages

In addition to text, pictures can also be sent to contacts. This is possible by clicking on the photo camera icon, which is to the left of the text field (see Figure 14).

Figure 14

Figure 15

The above figures illustrate the following functions:

  1. With this button, you will be taken to the photo capture preview, where you can take a photo and send it.
  2. You can open or download a photo by clicking on the message. Whether a photo has not yet been downloaded is indicated by a rough photo resolution and a centered download symbol. As soon as a download is triggered, its progress is indicated by a green progress bar in the lower half of the photo. By pressing and holding the photo you can also share it with other contacts. Therefore you need to click on the appearing share button (see figure 5, item 2).
  3. Use this button to return to the chat history from the photo capture preview.
  4. This button triggers a capture and sends it to your selected contact. You'll be back inside the updated chat history.

Info

In the case of photo messages, there is no access to the private photo memory or the gallery of the device. The photos are only managed and stored internally by and within mRay.

Audio messages

Additionally to text messages you can also send audio messages. Simply click the microphone button, which is located at the opposide of the input field on the chat screen (see Figure 16).

Figure 16

The upper figure visualizes the following functions:

  1. The flashing 'REC' symbol will show up when you are recording an audio message.
  2. The time readout shows how long the record is until now.
  3. By clicking the close button you can cancel the message.
  4. The oscilloscope shows the volume in discrete time steps while you record.
  5. You can take a break from recording by clicking the 'pause' button and continue to another time. By clicking the 'pause' button the icon will change to a microphone, which you need to click if you want to continue.
  6. As soon as the recording is completed you can click the 'send' button to the reciever.

Notifications

mRay informs users about new datasets and messages. These notifications will appear in the center of the upper edge on the screen when the application is opened, or as a system notification (just like recieving a SMS, see Figure 19) when the application is running in background (Figure 18, Item 1). The number of new arrived datasets and messages will be displayed as badges on the corresponding tab symbols of the inbox and the messenger (see Figure 19). You may change the types of notifications in the settings menu.

Figure 17

By clicking the notification you will open the application which will switch automatically to the relevant spot (for example to the messages).

Figure 18

Figure 19

Info

The notifications do not contain patient data or contents of messages to provide protection and privacy as good as possible.  

Query/Retrieve

With the query/retrieve function you are able to search for contents directly in a PACS (Figure 20). 

Figure 20

Please note the following general hints to the PACS query

mRay sends your entries to the PACS. You can use so called wildcards (*/?) just as you are used to it in your usual PACS environment. Only the name field appends the wildcard sign '*' as a default. If you don't make any specification the field will be ignored at a query.

The following functions are available on this screen: 

  1. Insert the patient ID here.
  2. Insert the name or a part of the name here.
  3. Insert the birthday here. Note: the cursor will jump to the next field automatically as soon as there are two sings in the day field ('d') or in the month field ('m').
  4. Select a period. Note: too large periods can cause your PACS to take a hugh amount of time to proceed and should be used with caution.
  5. Select the modality.
  6. Start query.
  7. Delete all input fields.

Note

In certain circumstances there are some extra input fields visible. For more information please contact your administrator.

Query results view

In the query results view there will be all patients enumerated, which have a match with your query (Figure 21).

Figure 21

This view provides the following functions: 

  1. In the results you can click to switch between Patient > Studies > Series level.
  2. You can also select and hold a patient or a study/series you can make the decision to download on any level. You can also select several entries on one stage and deselect by clicking it again.
  3. Downloads the selected datasets. Please note: you will be redirected to the inbox immediately. As soon as the data will be transfered by the PACS you will recieve a note in your inbox. As soon as the mRay server recieved the data you can download it on your device. If 'autodownload' is activated your device will download the datasets automatically.
  4. If the selection aborts you'll get back to the Q/R screen.

Favorites

In the favorites tab your bookmarked datasets will be enumerated. They will be viewed just like in the patient list. You can also remove them from your favorites (see chapter Inbox).

Viewer

Selecting a series will open the viewer.

Figure 22

The following functionality is available:

  1. Switch back to the inbox/patient list with the inbox button .
  2. Adjust level window presets with the 'Level-Window'-Button.
  3. Hide all information and interaction tools button .
  4. The view shows the image data. The tools allow you to interact and adjust the image.  You can always use the two fingers to zoom in/out, except of you turned on 1:n zoom.
  5. Information about the patient, study, modality, level window, compression and image layer.
  6. Split button and close buttons to manage multiple views (up to 2 on smartphones, 4 on tablets).
  7. The "Close"-Button moves the viewer to the background.
  8. 'MPR-modality'-button to change the view modality. Read more
  9. Measuring scale to quickly estimate sizes.
  10. The scrollwheel allows the user to scroll trought a series.
  11. The scrollbar allows the user to scroll trough a series.
  12. Opens the tool and interaction menu

Series- and key image buttons

The series- and key image buttons only appear when there is another series or keyimage for the current series (Figure 23). 

Figure 23

  1. Go to the previous series in the study.
  2. Go to the next series in the study.
  3. Go to the next key image for that study.

Interactionbar

The Interactionbar offers tools and functionality to interact with the currently open image (Figure 24). It contains a toolmenu button (1) and a scrollwheel (2) to navigate trought 3D datasets. The toolmenu button shows the currently selected tool. 

Figure 24

The scrollwheel allows you to scroll trought a series image layers. You can interact with the scrollwheel by tapping the arrow keys for next / previous slice or scrolling the wheel with your finger. By releasing the wheel it will instantly stop.

Scrollbar

The Scrollbar (Figure 25 #1) allows you to change the currently viewed image slice, like the scrollwheel. In difference to the scrollwhel, the scrollbar's layout instantly indicates where you are in the image slice stack. Depending on your view rotation, the scrollbars top/bottom or left/right edge symbolize the beginning/end of the dataset. There are two different scrolling modes:

  • Relative: If you are tapping the scrollbar at a position of your choice and start to move, you will scroll trought the image slices based on your scroll speed. The finger movement is not synchronized to the scrollbar handle position. The scrollspeed is adjustable by increasing/decreasing the distance of your tap to the scrollbar while scrolling.
  • Absolute: In order to activate this mode double tap on the scrollbar. While this mode is active, changing the position of your finger will change the position of the handle directly. By releasing the touch the scroll behavior switches back to relative.

Figure 25

MPR views

The MPR views allow you to open up multiple views at once (Figure 26). Following screenshots show the MPR view: 

Figure 26

The Screenshot shows the original view of a dataset, the locally computet reconstructions (MPRs) and information to the viewed dataset. 

  1. Add more views here. The maximum number of views is 2 on smartphones and 4 on tablets .
  2. Inidication of the current view direction in relation to the original image stack. You can change the view direction by pushing this button .
  3. Use this button to synchronize views

You can change the perspective with the MPR perspective button (Figure 26, Point 1). This allows you to switch between the different modailitys and a 3D reconstruction. The buttons in the top right corner (Figure 26, Point 2), allows you to open or close a view. If there is more than one view, a button to synchronize view adjustments will appear.

Info

The 3D reconstruction shows planes of the currenlty open views.  This view will only contain contents if there is at least one open MPR view. Smartphones can only open up to 2 views and can not use the 3D reconstruction.

In order to interact with a view you have to select the appropriate view first. In order to do so, just tap on the view. The selcted view is marked by an orange border. 

Warning

mRay allows you to load different datasets in different views. After opening a new view, you can open another series by tapping on the inbox button. It is also possible to view two different patients at the same time. To prevent a confusion between different patients a permanent warning is shown.

Toolmenu

Figure 27

You can select the following tools from the toolmenu (Figure 27): 

  • Interaction
    • 'Level Window': With the level window tool you can modify the grayscale values and brightness of the view. (Viewcontrol).
    • 'Panning': The panning tool allows you to pan, increase and decrease the size of the image.  This tool is selected by default
    • 'Thickness':Maximum intensity projection (MIP).View multiple slices at once (slices are superimposed). A maximum of 12 slices can be superimposed on each other.
  • Tools
    • 'DICOM Cine': Allows to play DICOM Cine files. Is only available for 3d datasets.
    • 'Zoom': Zoom the image in and out in the preselected 'FREE' mode. By tapping the tool it will zoom the image to one of the prefabricated zoom levels in the following formats: 1:1, 1:2, 1:4 and 'REAL' (which provides a life size enlargement).
    • 'Create report': Open a dialog to create a structured report while viewing the image. This report will then be uplaoded to the PACS if this feature is included in your license.
  • Annotations
    • 'Measurement': Create measurements on a slice of the image data set.
    • 'Note': Place a note on a slice of the image data set.
    • 'Arrow': Place an arrow on a slice of the image data set to highlight important regions.
    • 'Region of interest': This tool allows to mark a region of interest with an elliptical selection which shows information about the selected region imagedata.
    • 'Angle': Place an angle measurement on a slice of the image data set.
    • 'Remote angle': Allows to measure an angle (like the angle tool) between two lines.
    • 'Length ratio': Show the length ratio between two lines.
    • 'Save keyimage (to PACS)': Saves the current view with all Annotations. The original dataset will not be touched. Optionally the keyimage will be uploaded to the PACS if your license supports the 'PACS upload' and it is properly configured.
    • 'List of annotations': Contains all annotations you added to the image. By selecting an annotation in the list you'll get the opportunity to rename or delete the annotation.

    Info

    The currently selected tool is saved across studies.

    Level-Window presets

    mRay allows you to create presets for the Level-Window tool. These can be selected from the Level-Window menu (Figure 28, right: In editmode). Please note: These presets are saved to the device and are not synced to other devices.

    Figure 28

    1. DICOM: Sets the level window to the settings set in the DICOM tags.
    2. FULL: Set the level window to the full spectrum of grayscale values.
    3. INVERT: Like full, but inverted.
    4. Tap: Sets the level window for the view. Hold: Selection of Preset(s) (Figure 29)
    5. Creates a new preset.
    6. Select one or more presets.
    7. Delete the selected preset.
    8. Edit the selcted preset (Figure 28).
    9. Move preset up/down.

    Figure 29

    Annotation menu

    The following button (Figure 30) will appear in the toolmenu if the user has created any annotations.

    Figure 30

    1. Opens the 'List of annotations' window (Figure 31)

    Figure 31

    1. A single tap selects and jumps to the annotation. Tap and hold will open the annotation submenu (Item 2,3).
    2. Deletes the selected annotation.
    3. Edit the name of the currently selected annotation.

    Text annotations

    The note tool creates text notes in the current slice image (Figure 32). Notes can be edited by double tapping on them. Notes can be selected by tapping on them or selecting them in the annotation list, like measurements. You can move the selected Note with one finger. You can delete notes and measurements from the annotations menu.

    Figure 32

    Measurements

    The measurement tool allows you to create measurements on an image slice. The display length is rounded to one digit after the comma. The inserted measurement (Figure 33) can be adjusted by 'Pinch-to-Zoom'. Alternatively you can adjust booth ends separately. In order to do so you have to tap on the transparent circles at the end of the line. You can create as much measurements as you want in one image. You can reselect a measurement by tapping on it or selecting it from the 'List of annotation' window.

    Figure 33

    Attention

    The measurement information is read out the data send by the PACS. Missing or corrupted spacing data could lead to wrong measurments. Should you encounter problems with wrong measurements there could be an issue in the modality setup of the image data. Please consult the appropriate IT-Support. 

    In 2D-radiographs the measurements show the size like it would be shown by the X-ray detector. Keep in mind that measurements show the size of the projection and not the physical size of a structure! This also applies to the 'REAL' zoom mode!

    Angle tools

    The angle tools allows you to create an angle in the current image slice (Figure 34). The angles lines are adjustable in their length and direction so that you can modify the angly by your needs. You can move the whole angle by tap and hold the intercept point. The angle can be deleted from the annotation menu. 

    Figure 34

    Beside the normal angle tool there is the remote angle. While the normal angle is a real angle, the remote angle calculates the angle between two lines without a crossing point. Beside that, it can be used like the normal angle tool.

    Figure 35

    Region of interest

    With the 'Region of interest' feature in the toolmenu you are able to add a region of interest (short: ROI) to an image or a slice (Figure 36). After adding a ROI it is activated by default and ready for individualization. The ROI can be moved by tapping the cross in the middle of it and dragging it around. By using the two touch handles (white, transparent circles at the edge of the ROI) you are able to shape and rotate the ROI. On the opposide of the touch handles you'll find the following information:

    • count: Number of pixels inside the ROI.
    • min: Smallest selected greyscale value.
    • max: Biggest selected grayscalwe value.
    • avg: Average grayscale value of all selected pixels.
    • stddev: Average spread of all grayscale values from the average grayscale value.

    Figure 36

    Attention

    • If you are using a coloured dataset, the above mentioned average will be calculated by all color channles of the image.
    • The ROI will select all pixels that are either contained or hit by the ROI selection.
    • Measurements are rounded to one digit after the comma (exception: count).

    Create report

    If your server license includes the structured reporting feature then your are abel to create textual report within mRay. By tapping the 'create report' button in the toolmenu you are able to create a DICOM Structured Report, which will be added to the current study and saved to the PACS (if the PACS upload feature is included in your server license). See (Figure 37)

    Figure 37

    1. This will save the report. After saving it to the PACS it will be added to the study.
    2. If you want to close the report window without discarding the currently written text you can easily hide it with this button. The 'create report' icon will appear in the lower right corner of the screen. By tapping the icon the report window will be reopened.
    3. To minimze the window tap this button. Please note that the current report stays in progress and the text will still be available.

    You can reopen the minimized input window by pushing button (1) in the interaction bar.

    Figure 38

    Notes

    • Please ensure adequate light conditions when operating mRay.
    • Please ensure a clean display while operating mRay.
    • Only use mRay in stress-free situations in order to ensure correct use.
    • Please note that mRay does not visualize left or right in datasets.
    • Please ensure that the system clock and time are correctly configured.
    • Please ensure that your device is secure against electromagentic rays before using mRay in a magnetic resonance imaging room.
    • Please ensure that you are using the latest version of mRay after reinstallation of the application.

    Frequently asked questions – FAQ

    • Why do some datasets have the red tag „resolution reduced by xy%“? The application supports pictures up to 4096*4096*4096 pixels. Larger datasets will be downsize. The percentage value describes the factor by which it was downsampled.
    • Why do some datasets have the green tag „JPEG”? Those datasets are transferred by employing JPEG compression (according to the Konsensius-Conference [Loose et al. 2009]).
    • The patient list does not show all datasets. Why? Please check if there are still letters in the search field. If so, please delete them.
    • Why are no results shown after performing a query search to my PACS, although the patient is listed in my PACS? Some PACS distributers require a case sensitive search. Searching for “smith” will not lead to a result list as searching for “Smith” does.

    Known issues

    The list of known issues leads to problems identified after the release of the latest version of mRay. These problems, however, were classified as non-critical, so that an unrestricted working with the application is possible.

    1. Pseudonymization of images is not applied to the burned- in pixel data information. Please communicate this fact to the users to ensure that the data is sent only to pools for which Pseudonymization is turned off.
    2. Form fields for floating point numbers within the configuration application only accept values in english format, i.e. with a point as a delimiter.
    3. The auto-download setting Wifi/Mobile is not applicable for the Windows version of mRay client app.
    4. The image retrieve status information can sometimes hang at 100% until the image is finally retrieved.
    5. Multi touch gestures might trigger a button press event if they end above a button. This will happen altough the gesture is recognized as intended.
    6. With Android 6.0.1 and higher it is possible, that the application crashes in some infrequent cases if it is running in background mode. The application then shows a black screen and can not be operated anymore. It will be usable again as soon as it is terminated and restarted, which means you need to remove it from the overview of the running apps.
    7. The Windows desktop client application may show a blank icon in the taskbar for a short time.
    8. Creating DICOM Structured Reports does not work with non DICOM files.
    9. In rare cases it takes a little more time as usual to log in, if the device was just approved by the administrator.
    10. The new Android 7 splitscreen mode will lead the application to crash, if it is displayed in a splitscreen.