Investigation of a MOSFET dosimetry system for midpoint dose verification in prostate 3D CRT/IMRT

被引：0
作者：
T. Wiese
E. Bezak
R. Nelligan
机构：
[1] Royal Adelaide Hospital,Department of Medical Physics
[2] University of Adelaide,Department of Physics
来源：
Australasian Physics & Engineering Sciences in Medicine | 2008年 / 31卷
关键词：
in-vivo dosimetry; MOSFET; prostate treatment; IMRT;
D O I：
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学科分类号：
摘要：
The suitability of MOSFETs (Metal Oxide Semiconductor Field Effect Transistors) for use in in-vivo dosimetry for IMRT prostate treatment and patient setup errors has been investigated in this work. MOSFETs were placed on entrance and exit surfaces of a number of different phantoms (with varying complexities from homogeneous to anthropomorphic). Dose measurements were then used to calculate a midpoint dose, which was compared with an IC placed at the isocentre. The agreements found between the calculated (MOSFETs) and the measured midpoint dose (IC) was: 0.7 % for a prostate treatment verification and 3.5 % for an IMRT treatment. MOSFETs placed on entry and exit surfaces can detect patient setup offsets of 2 cm, but do not have the sensitivity to confidently detect offsets of 1 cm or smaller.
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页码：180 / 190
页数：10
相关论文
共 22 条
  • [1] Varadhan R.(2006)In vivo prostate IMRT dosimetry with MOSFET detectors using brass buldup caps Jnl. Appl. Clin. Med. Phys. 7 22-32
  • [2] Miller J.(2002)Investigation of the use of MOSFET for clinical IMRT dosimetric verification Med. Phys. 29 1109-1115
  • [3] Garrity B.(2001)A simple and robust method for in-vivo midline dose map estimations using diodes and portal detectors Radiother Oncol. 58 169-78
  • [4] Weber M.(2003)Patient setup and verification for intensity modulated radiation therapy (IMRT) Medical Dosimetry 28 175-183
  • [5] Chuang C.F.(2003)Total ionizing dose effects in MOS Oxides and devices IEEE Transactions on Nuclear Science 50 483-483
  • [6] Verhey L.J.(2002)MOSFET dosimetry on modern radiation oncology modalities Radiation Protection Dosimetry 101 393-398
  • [7] Xia P.(1994)Midplane dose determination using in-vivo dose measurements in combination with portal imaging Phys. Med. Biol. 39 1089-1101
  • [8] Broggi S.(1994)A method for dose calculation for high energy photon beams based on measurements performed at reference depth Med. Phys., July 15 254-307
  • [9] Fiorino C.(1993)undefined Acta Oncol. 32 525-533
  • [10] Calandrino R.(undefined)undefined undefined undefined undefined-undefined
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