In PS version 6.8.6 you must create a folder named "Raw" into which 16-bit signed image data and DICOM meta-data have been exported from OsiriX in the .raw and .xml file formats. PS7 is expected to support direct import of most DICOM files.
The Multi-Planar Reconstruction (MPR) window is used to manage the loading, display, and reconstructions derived from a 3D CT (or MRI) image series. The 3D image series is expected to consist of a head-first, supine (HFS) sequence of thin axial slices covering the orbits and including both eyes plus a few cm superior and inferior to the orbits. It is important that both eyes are included because ocular symmetry will be leveraged to help compensate for head rotations in the scanner. Slice spacing must be consistent and slice thickness as thin as possible (e.g. < 1mm). Image data must be 16-bit monochrome. Individual image size is anticipated to be 512x512 pixels.
The status line just below the toolbar provides information about the currently selected layout pane.
In addition to the buttons in this window, other reconstruction parameters and access to DICOM meta-data are adjustable from the MPR menu which is added to the menu bar any time this window is frontmost.
The MPR window defaults to single pane layout mode. In this layout you can load an image series by dragging and dropping a folder of images. In version 6.8.6 the image series must be prepared using OsiriX. The folder must be named Raw and it must contain all of the image data in RAW file format using the Export->Raw... menu of OsiriX. There must also be a file containing the DICOM meta-data, exported from OsiriX's Meta-Data window in .xml file format (e.g. PatientName.xml).
Planar reconstructions are created by switching to 6 pane layout using the Layout control in the toolbar. The six planar reconstructions are:
- Upper left pane (Sa): Sagittal reconstruction.
- Lower left pane (Ax): Axial reconstruction.
- Upper middle pane (Eq): Equator reconstruction.
- Lower middle pane (TM): Tumor-meridian reconstruction.
- Upper right pane (Ne): Nerve-coronal reconstruction.
- Lower right pane (TC): Tumor-coronal reconstruction.
The meridian angle and coronal planar offsets from the equator automatically track those planes as they are defined and set in the
Planar Dosimetry window. The crosshair displayed in the axial, sagittal and equator is used to
find the geometric center (as defined by Plaque Simulator) of the eye. Fine tuning of the eye model will be accomplished by capturing these MPR window reconstructions (using the
Auto Capture control) to Plaque Simulator's
Image window and proceeding as usual in that window.
The orthogonal MPR crosshairs includes 1 mm tick marks and an optional histogram of the gray levels of the pixels beneath the histogram axes. The outer sclera is designated by a dashed green oval. The surface for oblate-spheroid reconstructions (e.g. the inner surface of the sclera to map the tumor base) is designated by a dashed red oval. The basic dimensions of the eye and spherical reconstruction surface can be adjusted using the control handles found on the crosshair axes. In the example below you can see in the nerve-coronal reconstruction (upper-right pane) that the center of the optic nerve connects to the eye about 1 mm superior to the geometric axial bisecting plane.