MOSAIQ User's Guide - UCSF Radiation Oncology

CHAPTER 6: MLC Fit
The display may be affected by the current image state: If you change the gantry angle, couch
angle, or couch top using edit controls, capture settings, or import, the Reference Image
becomes unavailable.
Geometry display in Image: Check to show the treatment geometry on the image, and uncheck
to hide the treatment geometry layer. This check box is only available when the
following ten conditions occur:
The image is for the currently selected patient.
The image is a Simulator or DRR image.
The image is not an image series.
The image is enabled for Tx Definition.
The image is a reference image and is reticle-scaled and has square pixels.
The image is associated with the currently selected field, and the treatment machine
assigned to the field is characterized. The treatment geometry comes from the
associated treatment field definition.
The Shadow filter is not applied.
The image does not have an incomplete Re-Image change request.
The image is not voided.
The image is not archived.
MOSAIQ alerts you when the image is archived.
MOSAIQ alerts you when you manually display reference image for the first time because it
did not automatically appear.
MOSAIQ alerts you when another user edits the image between the time you opened the
Beam’s Eye View dialog box and attempt to save, aborting the save and keeping the Beam’s
Eye View dialog box open. You can only close the dialog box by canceling.
You can change the Vertical, Lateral, and Longitudinal couch
parameters, and the reference image remains available.
Beam’s Eye View Calibration Point Digitization
The Beam’s Eye View Calibration Point Digitization dialog box prompts you to digitize a
point and gives the coordinates of the point digitized. After digitizing each point, a “beep”
sounds and you are prompted to enter the next point. Upon digitizing the second point the
transformation parameters are computed. After digitizing the third and fourth points, the
scaled digitized values are compared with the specified values. If the scaled value is not
within the specified tolerance of the desired value, the calibration process terminates.
Beam’s Eye View Shape Rotation
This dialog box enables you to enter a new angle to rotate the treatment shape. If the
orientation of the reticle angle was incorrect when you digitized the treatment shape, you can
simply rotate the shape using this dialog box instead of digitizing a new shape.
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LUGMSQ0002/4.0/23-Sep-2010