MOSAIQ User's Guide - UCSF Radiation Oncology

Setup Alerts
CHAPTER 7: Image Management-ViewStation & Photos and Diagrams
When you set up the patient, Setup Intelligence can alert you if you need to shift the beam
isocenter (also called the zero point) from initial setup marks.
1. Click the first treatment field associated with a prescription site that contains an offset
value (Prescribed Relative Offset and/or Localization Offset) to open the Setup Alert
dialog box and show the offset.
Session Offsets
Or, if you have the Treatment Delivery Table window open, right-click or press F4, then
click View Setup Alert… to open the Setup Alert dialog box.
Refer to Figure 52.
Figure 52: Setup Alert Dialog Box
After you set up the patient and align his/her setup references with the lasers and light
field, you then apply the Total Offset. You should apply these offsets before treating or
imaging.
MOSAIQ collects setup error data during each treatment session that you can use patient
positioning before treatment. MOSAIQ also records Session Offsets calculated with images
on the Isocenter Offset tab of the Image Review window. You can record Session Offsets
from external systems in the Third Party Offset dialog box.
MOSAIQ Image Review and Session Offsets
Setup Intelligence lets you register stereoscopic and 3D CBCT images. The planes of a
stereoscopic pair of images must be separated by at least 30°. ELEKTA/Impac recommends a
separation between 50° and 90°. A 90° (orthogonal) separation always gives the most
accurate results when using planar imaging for setup verification. Refer to Figure 53.
Copyright 2010, Elekta Impac Software 207
LUGMSQ0002/4.0/23-Sep-2010