PMID: 8971977Dec 1, 1996Paper

TLD array for precise dose measurements in stereotactic radiation techniques

Physics in Medicine and Biology
A ErtlW Griffitt

Abstract

We developed a new TLD array for precise dose measurement and verification of the spatial dose distribution in small radiation targets. It consists of a hemicylindrical, tissue-equivalent rod made of polystyrene with 17 parallel moulds for an exact positioning of each TLD. The spatial resolution of the TLD array was evaluated using the Leskell spherical phantom. Dose planning was performed with KULA 4.4 under stereotactic conditions on axial CT images. In the Leksell gamma unit the TLD array was irradiated with a maximal dose of 10 Gy with an unplugged 14 mm collimator. The doses delivered to the TLDs were rechecked by diode detector and film dosimetry and compared to the computer-generated dose profile. We found excellent agreement of our measured values, even at the critical penumbra decline. For the 14 mm and 18 mm collimator and for the 11 mm collimator combination we compared the measured and calculated data at full width at half maximum. This TLD array may be useful for phantom or tissue model studies on the spatial dose distribution in confined radiation targets as used in stereotactic radiotherapy.

References

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Citations

Apr 7, 2000·Medical Dosimetry : Official Journal of the American Association of Medical Dosimetrists·J Kalef-EzraC Kappas
Apr 1, 2010·Physics in Medicine and Biology·Einar WaldelandEirik Malinen
Sep 2, 1998·Physics in Medicine and Biology·P O KellermannE Gornik
Jul 3, 1998·Physics in Medicine and Biology·A ErtlP Kindl
Dec 12, 1997·Physics in Medicine and Biology·A ErtlR Hartl
Mar 10, 1999·Physics in Medicine and Biology·L Xiaowei, Z Chunxiang
Jan 12, 2021·Radiation Protection Dosimetry·Tomas KronEduardo G Yukihara

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