Application of stereo X-ray photogrammetry (SRM) in the determination of absorbed dose values during intracavitary radiation therapy

Kleffens, H.J. van; Star, Willem M.

doi:10.1016/0360-3016(79)90821-6

Cited by 23 publications

(7 citation statements)

References 9 publications

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“…Tissue attenuation and scattering are corrected for using the formula given by Van Kleffens and Star. 74 For the renormalization of dose specifications presented here, optimized dwell times are calculated using the same treatment planning system, with optimization on dose points placed at prescription distances from the source center for a treated length of 4.5 cm with nine dwell positions, with a dwell position step size of 5 mm. These dwell times are used to calculate the renormalized dose distribution, corrected for dose distribution anisotropy using the data from Williamson 75 The diameter of the treated vessel is assumed to be 6 mm.…”

Section: Catheter-based Intravascular Brachytherapy For Peripheral Vementioning

confidence: 99%

Intravascular brachytherapy physics: Report of the AAPM Radiation Therapy Committee Task Group No. 60

et al. 1999

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Recent preclinical and clinical studies indicate that irradiation using ionizing radiation in the dose range of 15 to 30 Gy may reduce the occurrence of restenosis in patients who have undergone an angioplasty. Several delivery systems of intravascular brachytherapy have been developed to deliver radiation doses in this range with minimal normal tissue toxicity. In late 1995 the American Association of Physicists in Medicine (AAPM) formed a task group to investigate these issues and to report the current state of the art of intravascular brachytherapy physics. The report of this task group is presented here.

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Section: Catheter-based Intravascular Brachytherapy For Peripheral Vementioning

confidence: 99%

Intravascular brachytherapy physics: Report of the AAPM Radiation Therapy Committee Task Group No. 60

et al. 1999

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“…42 The technology has been used for many years in radiotherapy to obtain surface contours, and now it is being used to register surface contours. [43][44][45][46] The current photogrammetry types used in radiation therapy are based on video or visible light, infrared, or laser detection. 47 The technologies of the cameras may be different, but the theory of operation falls in the following three categories based on the geometry of the systems: Stereo or binocular imaging which uses two cameras or receivers; Single Camera or cyclopedian/monocular imaging which uses a single camera or imager; or interferometry which can use either one or two cameras or detectors but relies on wave interference principals.…”

Section: Ib Theory Of Localization and Tracking Systemsmentioning

confidence: 99%

Quality assurance for nonradiographic radiotherapy localization and positioning systems: Report of Task Group 147

Willoughby

Lehmann

Bencomo³

et al. 2012

Medical Physics

108

126

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New technologies continue to be developed to improve the practice of radiation therapy. As several of these technologies have been implemented clinically, the Therapy Committee and the Quality Assurance and Outcomes Improvement Subcommittee of the American Association of Physicists in Medicine commissioned Task Group 147 to review the current nonradiographic technologies used for localization and tracking in radiotherapy. The specific charge of this task group was to make recommendations about the use of nonradiographic methods of localization, specifically; radiofrequency, infrared, laser, and video based patient localization and monitoring systems. The charge of this task group was to review the current use of these technologies and to write quality assurance guidelines for the use of these technologies in the clinical setting. Recommendations include testing of equipment for initial installation as well as ongoing quality assurance. As the equipment included in this task group continues to evolve, both in the type and sophistication of technology and in level of integration with treatment devices, some of the details of how one would conduct such testing will also continue to evolve. This task group, therefore, is focused on providing recommendations on the use of this equipment rather than on the equipment itself, and should be adaptable to each user's situation in helping develop a comprehensive quality assurance program.

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“…He fitted the f(r) data to a third-order polynomial function, f(r) = A+ Br +Cr 2 +Dr 3 (valid up to 10 cm from the source), with coefficients A = 0.99423, B = -5.318×10 -3 / cm, C=- 2.610×10 -3 /cm 2 and D = 13.27 × 10 -5 /cm 3 . Van Kleffens and Starr[ 23 ] provided an expression, f(r) = (1+ ar 2 ) / (1+br 2 ), with a= 10×10 -3 /cm 2 and b=14.50×10 -3 /cm 2 . Kornelson and Young[ 24 ] have given a functional form for the build-up factor, B ( r )=1+ k a (m r ) k b where μ is the linear attenuation coefficient at 60 Co energies, k a = 0.896 and k b = 1.063.…”

Section: Methodsmentioning

confidence: 99%

An analytic approach to the dosimetry of a new BEBIG ⁶⁰ Co high-dose-rate brachytherapy source

et al. 2012

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We present a simple analytic tool for calculating the dose rate distribution in water for a new BEBIG high-dose-rate (HDR) 60Co brachytherapy source. In the analytic tool, we consider the active source as a point located at the geometric center of the 60Co material. The influence of the activity distribution in the active volume of the source is taken into account separately by use of the line source-based geometric function. The exponential attenuation of primary 60Co photons by the source materials (60Co and stainless-steel) is included in the model. The model utilizes the point-source-based function, f(r) that represents the combined effect of the exponential attenuation and scattered photons in water. We derived this function by using the published radial dose function for a point 60Co source in an unbounded water medium of radius 50 cm. The attenuation coefficients for 60Co and the stainless-steel encapsulation materials are deduced as best-fit parameters that minimize the different

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Application of stereo X-ray photogrammetry (SRM) in the determination of absorbed dose values during intracavitary radiation therapy

Cited by 23 publications

References 9 publications

Intravascular brachytherapy physics: Report of the AAPM Radiation Therapy Committee Task Group No. 60

Intravascular brachytherapy physics: Report of the AAPM Radiation Therapy Committee Task Group No. 60

Quality assurance for nonradiographic radiotherapy localization and positioning systems: Report of Task Group 147

An analytic approach to the dosimetry of a new BEBIG ⁶⁰ Co high-dose-rate brachytherapy source

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Application of stereo X-ray photogrammetry (SRM) in the determination of absorbed dose values during intracavitary radiation therapy

Cited by 23 publications

References 9 publications

Intravascular brachytherapy physics: Report of the AAPM Radiation Therapy Committee Task Group No. 60

Intravascular brachytherapy physics: Report of the AAPM Radiation Therapy Committee Task Group No. 60

Quality assurance for nonradiographic radiotherapy localization and positioning systems: Report of Task Group 147

An analytic approach to the dosimetry of a new BEBIG 60 Co high-dose-rate brachytherapy source

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An analytic approach to the dosimetry of a new BEBIG ⁶⁰ Co high-dose-rate brachytherapy source