TG40 Summary


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Monthly QA of Multi-Mode Linear Accelerator

TG-40 Checklist Summary

Date:_____________________________________________________

Physicist:__________________________________________________

Machine:___________________________________________________

 

Test Procedure

Tolerance

Satisfactory

Unsatisfactory [1]

 

Dosimetry:

 

 

 

1.

X-ray output constancy

2%

q

q

2.

Electron output constancy

2%

q

q

3.

Backup monitor constancy

2%

q

q

4.

X-ray central axis dosimetry (PDD, TAR) constancy

2%

q

q

5.

Electron central axis dosimetry parameter constancy (PDD)

2mm @ therapeutic depth

q

q

6.

X-ray beam flatness constancy

2%

q

q

7.

Electron beam flatness constancy

3%

q

q

8.

X-ray and electron symmetry

3%

q

q

 

Safety Interlocks:

 

 

 

9.

Emergency Off Switches

Functional

q

q

10.

Electron Cone Interlocks

Functional

q

q

 

Mechanical Checks:

 

 

 

11.

Light/Radiation Field Coincidence

2mm or 1% per side

q

q

12.

Gantry/Collimator Angle Indicators

1 degree

q

q

13.

Wedge Position

2mm

q

q

14.

Tray Position

2mm

q

q

15.

Applicator Position

2mm

q

q

16.

Field Size Indicators

2mm

q

q

17.

Cross Hair Centering

2mm diameter

q

q

18.

Latching of Blocking Tray

Functional

q

q

19.

Jaw Symmetry

2mm

q

q

20.

Field Light Intensity

Functional

q

q

21.

Diodes

In Range

q

q

 



[1] If any item is marked Unsatisfactory, please attach an explanatory sheet

 

 
 

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Last modified: March 12, 2013

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