The 3D multi-planar reconstruction viewer allows you to navigate a dataset by re-slicing it in any desired orientation while allowing the usage of other standard tools like zooming, panning and quantification.
The main feature of this viewer is that it allows you to reslice the dataset in any arbitrary orientation.
Graphical User Interface
To reorient the reconstruction planes you must interact with the crosslines by dragging them around the view center. When reorienting one of the planes, the other planes are also reoriented accordingly and are kept perpendicular between each other.
The crosslines are colored to reflect which projection they represent: in the screenshot above, the top-left view is identified with the yellow color, as displayed in its top-right yellow square; in the other views, the yellow crossline represents the intersection between their displayed slice and the slice displayed in the top-left view.
When hovering one of the views with the mouse, the mouse location is projected onto the view's crosslines and drawn as a circle, using the same color as the crossline. The same circles will be displayed on the other two viewers, at the same 3D location.
The Toolbar
The viewer toolbar provides access to tools and functions that interact with the displayed dataset or with the viewer interface.
This toolbar can be customized just like the database window toolbar, but with other available items, which are reviewed in this section.
Tools
You can use this item to choose the mouse interaction effect for the left mouse button. By clicking on one of these buttons, you select the corresponding tool.
The following tools are available: WL/WW, Pan, Zoom, Rotate, Scroll and Revolve; the additional ROI tools are: Length, Angle, Rectangle, Oval, Text, Arrow, Open and Closed Polygon, Pencil, Point and Brush. The ROI tool button function changes through the pop-up button on the right side.
Adjustments
Through this item you define how to display the slice data. You may adjust the used WL/WW, CLUT and opacity table: just like in the 2D viewer, the presented pop-up buttons list the available presets.
LOD
This item allows you to specify the level of detail used to render the displayed slices. This may come useful if the MPR viewer is too slow on your workstation: by using a more coarse setting, it will take less time to compute the slices.
Thick Slab
You can use this item to redefine the thickness of the rendered slices, and their rendering mode. The thickness is defined in millimeters, displayed in the lower left field. It can be adjusted using the lower right slider.
The available rendering modes are the following: maximum intensity projection, minimum intensity projection, mean intensity projection and volume rendering.
Fusion
This item allows you to adjust the way a fused dataset is displayed on top of the base dataset.
Shading
When the thick slab mode is set to volume rendering, you may use this item to access the shading options used to render the slices.
4D Player
This item allows you to browse the displayed dataset in the fourth dimension, usually time. It also allows you to toggle the animation in this dimension, and its frame rate.
Reset
This button allows you to reset the display adjustments to the their initial state.
Export
This button allows you to store the current reconstruction as a new DICOM series. A dedicated interface is displayed so you can set several options for the dataset creation: a series name, the image size, the quality, the format, what MPR views to export, what range to export and more.
Best
This button re-renders the current slices using a set of parameters that maximizes the quality.
Movie
This button allows you to create a movie file with the current reconstruction. A dedicated interface is displayed so you can set several options for the sequence: the image size and what range to export.
Axes
This button toggles the visibility of crosslines.
Axis Colors
These buttons allow you to choose the colors associated with each MPR view. These colors are displayed in the top-right corner of each view and are used when drawing crosslines.
Mouse Position
This button toggles the visibility of the crossline circles that mark the projected mouse position.
Sync Zoom
This button toggles the synchronization of zooming between views. When activated, zooming in one view will also be applied to the other views of the MPR.
Views
These buttons allow you to reorganize the layout of the MPR views: the three buttons are linked to the classic, vertical and horizontal layouts.
Space and Flexible Space
The system-defined space and flexible space items allow you to separate the toolbar items in groups.
Other Functions
The MPR viewer also responds to the Photos and Email export options available in the File menu. These functions capture the active reconstruction as a JPEG image and transfer this file to either the Photos app library (in a dedicated OnePacs Workstation album) or the Mail app (attached to a new email message).
Also, this viewer supports fusion. To display a fused volume, the viewer must be launched from a 2D viewer displaying a fused series.