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BodyViz User Manual version 3.30.16

Getting Started

The BodyViz iPad app is a key component of the world's most scalable 3D MRI/CT visualization suite for anatomy education, medical simulation and healthcare communication. The BodyViz iPad app allows users to interactively rotate, pan and zoom through a patient's virtual anatomy in 3D, using the familiar and intuitive iOS gesture interface. Once the app is downloaded, four sample datasets are available for free. If your instructor or institution has BodyViz desktop and has created datasets for you to view, you must create a new account by entering an email and password under the menu in the upper left corner and provide this information to your instructor or institution.

All medical studies available to your account will display in the Dataset screen as shown in Figure 1. To further explore a study, simply on its thumbnail. This will take you to the Dataset Summary page for that study also shown in Figure 1. This view provides information such as the type of scan, date and location, resolution and size of the images contained in the data set, as well as patient information. Individual slices of the scan display on the right of the screen.

To view the 2D images in the dataset you can tap on any of the ones on the right side of the screen or select 'Slices' at the bottom of the screen. To view the dataset in 3D tap the thumbnail image on the left of the screen or select 'Volume' at the bottom of the screen. To delete the Dataset, tap the 'Delete' button at the bottom of the screen.

Figure 1: Dataset (left) and Dataset Summary view (right)

Slice Mode

In slice mode, users can view and manipulate the 2D images in the dataset. Select 'Manual' from the Manual/Animated switch. Pan through the slices by dragging the slider at the bottom. Information about the specific slice is displayed below the image area. Images use intuitive iOS gestures such as pinch to zoom and two finger panning.

Select 'Tissue' at the top of the screen to change the tissue type displayed on the slice. Select a preset in the 'Preset' tab, or select 'Precision' to create a custom viewing window. Select 'Color' at the top of the screen to change the color mode. Slices are automatically displayed in grayscale, but can be recolored using the different color transfer functions provided.

Select 'Animated.' Press the play button to watch a slideshow of the images. Increase the display speed using the 'Speed' slider to watch a smooth movie. Users can play the animation forwards or backwards by adjusting the Backwards/Forwards switch. The animation will loop unless the 'Loop' switch is toggled off.

Figure 2: 2D image slices in grayscale (left) and Stern (right) color transfer functions

Volume Mode

In volume a 3D representation of the dataset is created. This is done using BodyViz's proprietary technology. This allows 3D volumes to be rendered and examined in real-time on any iPad running iOS 7 or above. Once in this mode a user can rotate the volume freely by dragging a finger across the screen. Pinch to zoom and two finger panning are also available. The following functions all function for 3D volumes representations of the medical study.

Clipping Mode

Across the education spectrum, anatomy learning occurs in labs, classroom settings, within teams, and during individual study—especially when students have unfettered access to real human anatomy. BodyViz enhances learning by giving instructors and students access to interactive 3D visualizations rendered directly from MRI and CT scans. Instructors easily integrate BodyViz software into all levels of curriculum.

Figure 3a: 3D volume with clipping planes
Figure 3b: 3D volume with clipping planes

Color Mode

Use BodyViz's Color Mode to isolate and observe anatomical features that would be indistinguishable in a grayscale MRI or CT. Under the Color tab, select one of the available color transfer functions. For more contrast and visual impact, hit the 'Reverse Colors' button. Examples are shown in Figure 4.

Figure 4: 3D volumes with different color transfer functions applied

Tissue Type Mode

The Tissue Type mode allows different tissue types to be visualized quickly and easily by cycling between preset window ranges including Bone, Soft Tissue, Fat, and Lung. Users have the option to view different tissues through the available preset tissue density ranges or by creating their own range. While 'Presets' is selected, choose the desired tissue type preset to view only certain types of tissues. To create an exact range, selected 'Precision.' Move the sliders until only the desired tissues are visible. This is shown in Figure 5.

Figure 5: Tissue type mode using 'Presets' (left and middle) and 'Precision' (right)

Settings

Under the Settings tab, users can define app preferences. Display or hide the white bounding box around the form by toggling the 'Bounding Box' switch. To change the background color, select the desired color from the 'Background Color' menu as shown in Figure 6. Adjust the background noise and dynamic resolution with the associated sliders. 'Dynamic Resolution' and 'Dynamic Quality' sliders allow the adjustment of the visual precision as the volume is being rotated, translated, panned, etc.

Figure 6: Settings mode used to adjust background color
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