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Vol 70, No 2 (2020)
Original article
Published online: 2020-04-07
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Testicular dose contributed by X-ray volume image-(XVI)-guided intensity-modulated radiotherapy (IMRT) in prostate cancer patients

Dominika Hempel, Robert Chrenowicz, Tomasz Filipowski, Marek Z. Wojtukiewicz, Ewa Sierko
DOI: 10.5603/NJO.2020.0012
·
Nowotwory. Journal of Oncology 2020;70(2):47-53.

open access

Vol 70, No 2 (2020)
Original article
Published online: 2020-04-07

Abstract

Introduction: To assess the dose received by testes during XVI-guided IMRT in prostate cancer patients (PCPs).

Material and methods: Testes dose was calculated in 56 PCPs who underwent definitive IMRT using 6 MV or 15 MV photon energies. The dose was measured by thermoluminescent dosimeters (TLDs) MTS-N attached to the scrotum during the first three fractions of IMRT. Testicular concomitant exposure from XVI was measured using a PTW DIADOS E diagnostic dosimeter in ten randomly chosen patients.

Results: The mean and standard deviation values of the average calculated testes dose was 123 ± 117 cGy comprising 1.6% of the prescribed total irradiation dose (Dt). A testicular dose measured by TLDs was 303 ± 110.5 cGy (4% of Dt) and depended on the distance from isocenter to testes (r = –0.8). From one XVI scan, the detected testicular mean dose was 4.3 mGy. Mean XVI scan numbers for all patients was 10.4 so mean concomitant dose in testes was 44.7 mGy (0.06% of Dt).

Conclusions: Testicular dose may be significant in the aspect of fertility during IMRT in PCPs. Kilovoltage XVI-contributed dose to testes seems to be clinically negligible.

Abstract

Introduction: To assess the dose received by testes during XVI-guided IMRT in prostate cancer patients (PCPs).

Material and methods: Testes dose was calculated in 56 PCPs who underwent definitive IMRT using 6 MV or 15 MV photon energies. The dose was measured by thermoluminescent dosimeters (TLDs) MTS-N attached to the scrotum during the first three fractions of IMRT. Testicular concomitant exposure from XVI was measured using a PTW DIADOS E diagnostic dosimeter in ten randomly chosen patients.

Results: The mean and standard deviation values of the average calculated testes dose was 123 ± 117 cGy comprising 1.6% of the prescribed total irradiation dose (Dt). A testicular dose measured by TLDs was 303 ± 110.5 cGy (4% of Dt) and depended on the distance from isocenter to testes (r = –0.8). From one XVI scan, the detected testicular mean dose was 4.3 mGy. Mean XVI scan numbers for all patients was 10.4 so mean concomitant dose in testes was 44.7 mGy (0.06% of Dt).

Conclusions: Testicular dose may be significant in the aspect of fertility during IMRT in PCPs. Kilovoltage XVI-contributed dose to testes seems to be clinically negligible.

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Keywords

prostate cancer; testes doses; XVI; IMRT

About this article
Title

Testicular dose contributed by X-ray volume image-(XVI)-guided intensity-modulated radiotherapy (IMRT) in prostate cancer patients

Journal

Nowotwory. Journal of Oncology

Issue

Vol 70, No 2 (2020)

Pages

47-53

Published online

2020-04-07

DOI

10.5603/NJO.2020.0012

Bibliographic record

Nowotwory. Journal of Oncology 2020;70(2):47-53.

Keywords

prostate cancer
testes doses
XVI
IMRT

Authors

Dominika Hempel
Robert Chrenowicz
Tomasz Filipowski
Marek Z. Wojtukiewicz
Ewa Sierko

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