23.07.2013 Views

Dosimetrist/Physicist Training Guide - UCSF Radiation Oncology

Dosimetrist/Physicist Training Guide - UCSF Radiation Oncology

Dosimetrist/Physicist Training Guide - UCSF Radiation Oncology

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

Lesson 3: Adding Simulation and Treatment Fields<br />

Copyright 2009, IMPAC Medical Systems 99<br />

LTGRAD0005A/2.0/26-Feb-2009<br />

Notes Using the Apply Limits Option<br />

The Apply Limits option lets you correct out-of-bounds parameters for the Gantry<br />

angle, Collimator angle, MLC, Field size X/Y, and Jaws X1, X2, Y1, and Y2. If one or<br />

more of these field parameters exceeds the machine limits as defined in the Machine<br />

Characterization in MOSAIQ, the Positional Limits Exceeded message opens. In this<br />

exercise, you will apply the Apply Limits option.<br />

The Positional Limit Exceeded message shows different<br />

messages based on the task you are doing when you exceed<br />

the positional limits.<br />

If you use the Apply Limits option, make sure that your<br />

clinical staff verifies all changes.<br />

1. In the Diagnoses and Interventions window, double-click 1 - Lt. AP Lung.<br />

Opens the Treatment Field Definition dialog box for the selected treatment field.<br />

2. Change one or two geometric settings so that they are out of bounds.<br />

Makes sure that the message box appears.<br />

3. Right-click in the Treatment Field Definition dialog box or press F4.<br />

Opens the Treatment Field Definition Options menu, shown in Figure 80.<br />

4. Click Apply Limits.<br />

Figure 80: Treatment Field Definition Options Menu<br />

Closes the Treatment Field Definition Options menu and opens the Positional<br />

Limit Exceeded message box, shown in Figure 81.

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!