Recent Changes

Standard Imaging BeamChecker Plus - http://www.standardimaging.com/product_home.php?id=13
Tolerances (expected):
Dosimetry:Dosimetry:1
X-ray output constancy - 3%
Electron output constancy - 3%
Procedure / Tolerances
Daily quality assurance (QA) on a linear accelerator requires some basic steps before suggested specifications can be tested. First, on a Varian Clinac 2100C, the key must be turned to the on position. The Gantry is then turned to the upright 180o or straight down 0o location and temperature and pressures are checked. The temperature should read 40o, the gas should read 35 psi, and the pump pressure reading should be 80 psi. If any of the temperature or pressures are off the desired values QA is placed on hold and an engineer is contacted. After turning on the 4DTC computer, the multileaf collimation system (MLC) is turned on. Upon completion of testing all 60 MLC, the daily Linac QA may start.
and output tests.1tests.2
Safety checks:
a) Door interlock
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References
1.Kutcher1. Khan FM. The Physics of Radiation Therapy. 4th ed. Philadelphia, PA: Lippincott Williams & Wilkins; 2010(398).
2.Kutcher G, Coia
Monthly Treatment Machine QA:
Brandon and Bret

Merrill R, Miller M. Treatment planning system quality assurance. American Association of Medical Dosimetrists Web site. http://medicaldosimetry.org/meetings/2012Presentations/061012/Merrill.pdf. Accessed Sep. 26, 2013.
Able CM. Treatment planning system QA in the era of image guided radiotherapy. Able Medical Physics Web site. http://www.ablemedicalphysics.com/uploads/TPS_QA_in_the_Era_of_IGRT.pdf. Accessed Sep. 26, 2013.
treatment planning systemssystems: practical examples beams. 1st Ed.ed. Brussels, Belgium:

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References
radiation oncology. Medical Physics. 1994; 21(4):587-592.Med Phys. 1994;21(4):587-592.
Monthly Treatment Machine QA:
Brandon and Bret
Sun Nuclear Map Check
References:
Sun Nuclear Corporation. Available at:Corporation Web site. http://www.sunnuclear.com/home.asp. Accessed 2013.
2. IMRT QA II. The American Physicists in Medicine. Available at:Medicine Web site. http://www.aapm.org/meetings/05AM/pdf/18-2601-49028-323.pdf. Accessed
Conventional Simulator QA:
Becky Holly Dustin
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References:
Simulator. Nucletron Website.Web site. http://www.nucletron.com/en/ProductsAndSolutions/Pages/SimulixEvolution.aspx
2013. Accessed September 25, 2013.
2. Khan FM. The Physics of Radiation Therapy. 4th ed. Philadelphia, PA: Lippincott, Williams and Wilkins; 2010.
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References:
quality assurance. American Association of Medical Dosimetrists Web site. http://medicaldosimetry.org/meetings/2012Presentations/061012/Merrill.pdf. Accessed
Able CM. Wake Forest University school of Medicine. Treatment planning guided radiotherapy. Able Medical Physics Web site. http://www.ablemedicalphysics.com/uploads/TPS_QA_in_the_Era_of_IGRT.pdf. Accessed
Mijinheer B, Olszewska A, Fiorino C, et al. Quality assurance of treatment planning systems practical examples for non-IMRT photon beams. 1st Ed. Brussels, Belgium: ESTRO; 2004.

2. The American Association of Physicists in Medicine. Available at: http://www.aapm.org/meetings/05AM/pdf/18-2601-49028-323.pdf. Accessed October 2, 2013.
Conventional Simulator QA:
Becky Holly Dustin
Procedures:
{Nucletron Simplicity.JPG}

{New Picture (4).png} Image of an electron density phantom used to test accuracy of CT data transfer
{New Picture (1).png} Image of a Quasar body phantom used to test area and volumetric accuracy
Picture (2).png} Figure 3. Image showing
{New Picture (3).png} Image showing DVH determination on a Quasar phantom
Eclipse QA Sample Form:

- Tolerances are site specific
Images:
Picture (4).png} Figure 1. Image of Picture (1).png} Figure 2. Image of
{New Picture (2).png} Figure 3. Image showing axial CT slice of a Quasar body phantom
Picture (3).png} Figure 4. Image showing
Eclipse QA Sample Form:
{New Picture (5).png} {New Picture (6).png}

{New Picture (3).png} Figure 4. Image showing DVH determination on a Quasar phantom
Eclipse QA Sample Form:
6MV
5x5
10x10
Dose
100
Dose
100
ISC
1
ISC
1
OF
0.946
OF
1
Expected
105.7
Expected
100
Eclipse
105
Eclipse
100
Diff
0.7%
Diff
0.0%
PDD
PDD
Depth
Expected
Eclipse
Diff
Depth
Expected
Eclipse
Diff
1.6
100
100
0.0%
1.6
100
100
0.0%
5
84.2
84.1
0.1%
5
86
86
0.0%
10
62.8
62.3
0.8%
10
66.9
66.3
0.9%
20
34.8
33.7
3.2%
20
38.7
38
1.8%
20x20
30x30
Dose
100
Dose
100
ISC
1
ISC
1
OF
1.048
OF
1.077
Expected
95.4
Expected
92.9
Eclipse
95
Eclipse
93
Diff
0.4%
Diff
-0.2%
PDD
PDD
Depth
Expected
Eclipse
Diff
Depth
Expected
Eclipse
Diff
1.6
100
100
0.0%
1.6
100
100
0.0%
5
87.2
87.2
0.0%
5
88.1
87.7
0.5%
10
69.5
69.4
0.1%
10
70.9
70.8
0.1%
20
42.5
41.8
1.6%
20
44.6
43.8
1.8%
Note:
plan in Eclipse
Patient name
Eclipse
ID
QA-2010
16MV
5x5
10x10
Dose
100
Dose
100
ISC
1
ISC
1
OF
0.946
OF
1
Expected
105.7
Expected
100
Eclipse
105
Eclipse
101
Diff
0.7%
Diff
-1.0%
PDD
PDD
Depth
Expected
Eclipse
Diff
Depth
Expected
Eclipse
Diff
3
100
100
0.0%
3
100
100
0.0%
5
93.9
94.3
-0.4%
5
94.3
94.7
-0.4%
10
74.8
74.6
0.3%
10
76.6
76.6
0.0%
20
47.2
46.5
1.5%
20
50
49.3
1.4%
20x20
30x30
Dose
100
Dose
100
ISC
1
ISC
1
OF
1.049
OF
1.076
Expected
95.3
Expected
92.9
Eclipse
96
Eclipse
93
Diff
-0.7%
Diff
-0.1%
PDD
PDD
Depth
Expected
Eclipse
Diff
Depth
Expected
Eclipse
Diff
3
100
100
0.0%
3
100
100
0.0%
5
93.4
94
-0.6%
5
92.6
93.9
-1.4%
10
77
77.2
-0.3%
10
76.7
77.7
-1.3%
20
51.8
51.2
1.2%
20
52.3
52.2
0.2%{New Picture (5).png} {New Picture (6).png}
{New Picture (7).png}
References:
Merrill R, Miller M. Treatment planning system quality assurance. http://medicaldosimetry.org/meetings/2012Presentations/061012/Merrill.pdf. Accessed Sep. 26, 2013.