PMID: 9539580Apr 16, 1998Paper

Phantoms for IMRT dose distribution measurement and treatment verification

International Journal of Radiation Oncology, Biology, Physics
D A LowJames A Purdy

Abstract

The verification of intensity-modulated radiation therapy (IMRT) patient treatment dose distributions is currently based on custom-built or modified dose measurement phantoms. The only commercially available IMRT treatment planning and delivery system (Peacock, NOMOS Corp.) is supplied with a film phantom that allows accurate spatial localization of the dose distribution using radiographic film. However, measurements using other dosimeters are necessary for the thorough verification of IMRT. We have developed a phantom to enable dose measurements using a cylindrical ionization chamber and the localization of prescription isodose curves using a matrix of thermoluminescent dosimetry (TLD) chips. The external phantom cross-section is identical to that of the commercial phantom, to allow direct comparisons of measurements. A supplementary phantom has been fabricated to verify the IMRT dose distributions for pelvis treatments. To date, this phantom has been used for the verification of IMRT dose distributions for head and neck and prostate cancer treatments. Designs are also presented for a phantom insert to be used with polymerizing gels (e.g., BANG-2) to obtain volumetric dose distribution measurements. The phantoms have proven us...Continue Reading

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Citations

Jan 1, 2009·Radiological Physics and Technology·Tetsunori ShimonoHiroshi Okuda
Mar 19, 2004·Radiotherapy and Oncology : Journal of the European Society for Therapeutic Radiology and Oncology·Daniel LétourneauJohn W Wong
Jun 18, 2002·Radiotherapy and Oncology : Journal of the European Society for Therapeutic Radiology and Oncology·Nadine LinthoutGuy Storme
Mar 13, 1999·Radiotherapy and Oncology : Journal of the European Society for Therapeutic Radiology and Oncology·D A LowJ A Purdy
May 23, 2002·International Journal of Radiation Oncology, Biology, Physics·Daniel A LowJames A Purdy
Sep 25, 1998·International Journal of Radiation Oncology, Biology, Physics·S Mutic, D A Low
Nov 7, 1998·International Journal of Radiation Oncology, Biology, Physics·D A LowJ A Purdy
Sep 7, 1999·International Journal of Radiation Oncology, Biology, Physics·D A LowJ A Purdy
Apr 12, 2000·International Journal of Radiation Oncology, Biology, Physics·N DoganB Emami
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Jun 22, 2001·Medical Dosimetry : Official Journal of the American Association of Medical Dosimetrists·C B SawC A Enke
Jun 22, 2001·Medical Dosimetry : Official Journal of the American Association of Medical Dosimetrists·M Al-GhaziR Yakoob
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