Philips CARDIOMD, Service Manual

Page: 340 / 466

NEMA Multiple Window Spatial Registration (MWSR)
10-12
„
CardioMD Service Manual
1MAN0158-H11 04-2005 CSIP Level 1
10.5 NEMA Multiple Window Spatial Registration (MWSR)
10.5.1 Test Requirements
Detector: Phantoms. One detector at a time.
Source: 4 sources, Ba-133, Ga-67 or Tl-201 ~ 7–20 MBq or 200–
500
µ
Ci, yielding a total of 20 kcps or less.
Source holder: 4 point holders for the GEOCAL mask.
Phantoms: GEOCAL mask
Total test time: Approximately 10 minutes per detector.
10.5.2 Test Procedure
Note . If the CardioMD system is equipped with the AC Option, the transmission scanners must be
removed before the NEMA MWSR test can be performed. See Chapter 12 CardioMD AC Option
for instructions.
Procedure Details
1. In the NEMA menu, select MWSR.
The MWSR page appears.
2. Enter isotope energies as follows:
For Ba enter:
81 in the Energy low field.
155 in the Energy high field.
For Ga enter:
92 in the Energy low field
185 in the Energy high field.
For Tl enter:
72 in the Energy low field
167 in the Energy high field.
3. Click Continue.
4. Click OK to accept automated motions.
Automated motions will now position the de-
tectors for measuring MWSR.
Note . Automated motions must be started from patient load position.
Note . The position used for MWSR measurement is the same for both detectors. In this position
the detectors are raised above the patient table and rotated to +135°.