MOSAIQ User's Guide - UCSF Radiation Oncology

Localization Trend Review
CHAPTER 7: Image Management-ViewStation & Photos and Diagrams
Localization Trend Review lets you examine the patient setup correction and session offset
history. When you complete an image registration and click OK in the Image Review
window, the Localization Trend Review dialog box opens. The Localization Trend Review
dialog box shows active patient offset data. You can quickly examine the history of recorded
setup corrections for past treatment sessions and not open a series of images. You can open
the Localization Trend Review dialog box from the Treatment Delivery table, Diagnoses and
Interventions window, and the Localization Review Worklist.
Interfraction setup variation, as measured with setup imaging, consists of random and
systematic components. You can examine Session Offsets for patterns and correct systematic
setup variation during setup prior to verification imaging. When you remove systematic error
from treatment setup, the daily workflow efficiency increases and may reduce dependency on
daily setup imaging for many treatment sites. The systematic component of a treatment
course is equal to the average setup variation over a course of treatment. You can closely
determine this variation with measurements from the first several treatment sessions.
Setup Intelligence refers to systematic variation correction as a Localization Offset. You
include only the initial Session Offset for a series of treatment sessions when you calculate a
Localization Offset. The constant is the isocenter position relative to the localization
references (tattoos). You should assign any offsets you record when you verify a new couch
position after positional verification a status of Inactive or Excluded.
The Localization Trend Review dialog box opens, and shows offsets with an Active status
only. The Localization Trend Review Report lets you select filters such as Show History. The
report can show the current and/or historic offset information. Refer to Figure 59.
Figure 59: Localization Trend Review Dialog Box
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