open access

Vol 9, No 2 (2004)
Original papers
Published online: 2004-01-01
Submitted: 2003-12-11
Get Citation

MOSFET detectors as a tool for dose verification in photon beam radiotherapy

Marcin Dybek, Włodzimierz Łobodziec, Tomasz Iwanicki, Aneta Kawa–Iwanicka, Sebastian Markisch, Wiktor Zipper
DOI: 10.1016/S1507-1367(04)71009-3
·
Rep Pract Oncol Radiother 2004;9(2):45-50.

open access

Vol 9, No 2 (2004)
Original papers
Published online: 2004-01-01
Submitted: 2003-12-11

Abstract

Purpose

Application of MOSFET detectors in photon beam dose measurements in vivo in radiotherapy.

Materials and methods

Before measuring doses in vivo the following parameters such as: the dosimeter response to dose absorption, temperature, gantry angles and field side changes were determined using 6MV and 15MV photon beams. All measurements were made in a phantom to investigate the MOSFET accuracy, in electron equilibrium with a 0.6 cm3 Farmer ionization chamber.

Results

MOSFET parameters are presented in graphs. The conformity between the planned dose and the dose measured in vivo within ±5% was observed in 86% of patients treated with 6MV photon beams and 91% patients treated with 15MV, respectively (SD=3.5%).

Conclusions

MOSFET detectors are a useful tool for verifying the planned dose in external photon radiotherapy.

Abstract

Purpose

Application of MOSFET detectors in photon beam dose measurements in vivo in radiotherapy.

Materials and methods

Before measuring doses in vivo the following parameters such as: the dosimeter response to dose absorption, temperature, gantry angles and field side changes were determined using 6MV and 15MV photon beams. All measurements were made in a phantom to investigate the MOSFET accuracy, in electron equilibrium with a 0.6 cm3 Farmer ionization chamber.

Results

MOSFET parameters are presented in graphs. The conformity between the planned dose and the dose measured in vivo within ±5% was observed in 86% of patients treated with 6MV photon beams and 91% patients treated with 15MV, respectively (SD=3.5%).

Conclusions

MOSFET detectors are a useful tool for verifying the planned dose in external photon radiotherapy.

Get Citation

Keywords

MOSFET detector; in vivo dosimetry

About this article
Title

MOSFET detectors as a tool for dose verification in photon beam radiotherapy

Journal

Reports of Practical Oncology and Radiotherapy

Issue

Vol 9, No 2 (2004)

Pages

45-50

Published online

2004-01-01

DOI

10.1016/S1507-1367(04)71009-3

Bibliographic record

Rep Pract Oncol Radiother 2004;9(2):45-50.

Keywords

MOSFET detector
in vivo dosimetry

Authors

Marcin Dybek
Włodzimierz Łobodziec
Tomasz Iwanicki
Aneta Kawa–Iwanicka
Sebastian Markisch
Wiktor Zipper

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