kV/MV FPI Flashcards
1
Q
Isocentre check (quick)
A
Standard: +/- 2 mm
High precision: +/- 1 mm
2
Q
FPI calibration check
A
No uncorrected defective pixels or gross artefacts
3
Q
General imaging performance
A
Within specification
4
Q
Imaging scaling
A
+/- 1 mm over 100 mm
5
Q
Image centre alignment
A
+/- 2 mm
6
Q
System ‘flex map’ or ‘IsoCal’ calibration
A
Standard: +/- 2 mm
High precision: +/- 1 mm
7
Q
Isocentre coincidence (detailed)
A
Standard: +/- 2 mm
High precision: +/- 1 mm
8
Q
X-ray beam collimation- variable collimators
A
+/- 2 mm over 100 mm
9
Q
Ghosting
A
< +5% of baseline
10
Q
Geometric distortion
A
+/- 2 mm over detector
11
Q
Detector rotation
A
Within specification
12
Q
X-ray beam collimation- fixed collimators
A
+/- 2 mm of baseline
13
Q
Source and detector position
A
+/- 2 mm
14
Q
Radiographic tests including dosimetry measurements
A
Within specification
