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IMRT commissioning: Multiple institution planning and dosimetry comparisons, a report from AAPM Task Group 119
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10.1118/1.3238104
/content/aapm/journal/medphys/36/11/10.1118/1.3238104
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/36/11/10.1118/1.3238104

Figures

Image of FIG. 1.
FIG. 1.

Dose profile through central plane for bands. The lower curves are the individual contributions from each subfield (band); the upper curve is the summation.

Image of FIG. 2.
FIG. 2.

Multitarget structures: Central target, superior target, and inferior target. These three cylindrical targets are stacked along the axis of rotation. Each has a diameter of approximately 4 cm and length of 4 cm. Coronal and transverse views are shown.

Image of FIG. 3.
FIG. 3.

Mock prostate Structures: The prostate CTV, PTV, rectum, and bladder. The prostate CTV is roughly ellipsoidal with RL, AP, and SI dimensions of 4.0, 2.6, and 6.5 cm, respectively. The prostate PTV is expanded 0.6 cm around the CTV. The rectum is a cylinder with diameter of 1.5 cm that abuts the indented posterior aspect of the prostate. The PTV includes about 1/3 of the rectal volume on the widest PTV slice. The bladder is roughly ellipsoidal with RL, AP, and SI dimensions of 5.0, 4.0, and 5.0 cm, respectively, and is centered on the superior aspect of the prostate. Transverse and coronal views are shown.

Image of FIG. 4.
FIG. 4.

Mock head/neck structures: HN PTV, cord, and parotid glands. The PTV is retracted from the skin by 0.6 cm. There is a gap of about 1.5 cm between the cord and the PTV. The parotid glands are to be avoided and are at the superior aspect of the PTV. Transverse and 3D views are shown.

Image of FIG. 5.
FIG. 5.

CShape structures: CShape PTV and core. The center core is a cylinder 1 cm in radius. The gap between the core and the PTV is 0.5 cm, so the inner arc of the PTV is 1.5 cm in radius. The outer arc of the PTV is 3.7 cm in radius. The PTV is 8 cm long and the core is 10 cm long. Transverse and 3D views are shown.

Tables

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TABLE I.

List of participating institutions and the systems utilized. Manufacturer’s identifications are listed below the table. “DMLC” refers to dynamic MLC, sometimes called “sliding window.” “SMLC” refers to static MLC, sometimes called “step and shoot” (Varian, ECLIPSE: Varian Medical Systems, Milpitas, CA; Siemens: Siemens AG, Healthcare Sector, Erlangen, Germany; Elekta, CMS: Elekta Inc., Norcross, GA; PINNACLE: Philips Healthcare, Andover, MA; TOMOTHERAPY: TomoTherapy Inc., Madison, WI).

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TABLE II.

Treatment plan statistics for multitarget.

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TABLE III.

Treatment plan statistics for mock prostate.

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TABLE IV.

Treatment plan statistics for mock head and neck.

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TABLE V.

Treatment plan statistics for CShape (easier).

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TABLE VI.

Treatment plan statistics for CShape (harder).

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TABLE VII.

High dose point in the PTV measured with ion chamber: , averaged over the institutions, with associated confidence limits.

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TABLE VIII.

High dose point in the PTV measured with ion chamber: , averaged over all the test plans measured at each institution, with associated confidence limits.

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TABLE IX.

Low dose point in the avoidance structure measured with ion chamber: , averaged over the institutions, with associated confidence limits.

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TABLE X.

Low dose point in the avoidance structure measured with ion chamber: , averaged over all the test plans measured at each institution, with associated confidence limits.

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TABLE XI.

Composite film: Percentage of points passing gamma criteria of 3%/3 mm, averaged over the institutions, with associated confidence limits.

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TABLE XII.

Composite film: Percentage of points passing gamma criteria of 3%/3 mm, averaged over the test plans, with associated confidence limits.

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TABLE XIII.

Per-field measurements: Average percentage of points passing the gamma criteria of 3%/3 mm, averaged over the institutions, with associated confidence limits.

Generic image for table
TABLE XIV.

Per-field measurements: Average percentage of points passing the gamma criteria of 3%/3 mm, averaged over the test plans, with associated confidence limits.

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/content/aapm/journal/medphys/36/11/10.1118/1.3238104
2009-10-27
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: IMRT commissioning: Multiple institution planning and dosimetry comparisons, a report from AAPM Task Group 119
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/36/11/10.1118/1.3238104
10.1118/1.3238104
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