MOSAIQ User's Guide - UCSF Radiation Oncology

MOSAIQ User’s Guide
Typically, you analyze the Session Offset trends from the same setup position. When you
complete the setup correction, you now have a new setup position. You would usually not
want to include Session Offsets from an older starting position in trend analysis with offsets
calculated from new landmarks. If you change the site setup after you recorded a positioning
verification from new landmarks, you could click the No button and manually select which
session offsets to exclude.
CBCT Acquisition
Importing Reference Structure Sets and CT Data
You must import the patient's reference CT, Structure Set, DRRs, and the RT Plan via DCM
(this is done automatically if the CT and Structure Set are sent from your TPS to the
configured ELEKTA/Impac DCM workstation on your network).
All CTs, MRs, and Structure Sets are sent to DCM and saved directly
to the DB. They do not go through Namer.
The RT Plan goes through DCM and is available for RTP Import. A raw copy is stored in the
\\MOSAIQ_app\nonimage folder. DRRs go through DCM and then to NAMER for import.
You can also import acquired CBCT images into MOSAIQ using a mapped network drive.
All Treatment Calendar Sessions, for which you want to perform CT based matching, must
include the CT field, along with the desired treatment fields. All these fields must have the
exact same couch parameters.
Acquiring the CBCT Data
1. Import the RTP plan. Double-click the Site Setup that is available for import. The
isocenter values of the plan and the structure set UID show (there will not be any data
for Frame Of Reference UID). If there are no Isocenter values, you must manually type
them to acquire a CBCT.
2. Open the Diagnoses and Interventions window and open the Site Setup. Make sure that
the Patient Orientation, structure sets, and isocenter are specified, and then approve the
Site Setup.
3. Open the image list to view the reference CT. When highlighted, it lists the number of
images (slices) in the lower left. It does not show a thumbnail view. You can delete the
reference CT. The reference CT always has Review Required selected.
4. Click Open or Review to open the reference CT. This opens the 3D Image Review
window. Your hardware, specifically the video card, must meet the requirements
specified in the MOSAIQ System Requirements under Workstation Requirements; Image
Review. An isocenter error appears if the CT is not associated with the site. The
Structure Set list is not available if the site setup for the Rx is not specified and approved.
5. Click in the 3D Image Review window to open the Image Information dialog box.
6. Change the review status if desired.
218 Copyright 2010, Elekta Impac Software
LUGMSQ0002/4.0/23-Sep-2010