Contralateral breast dose with electronic compensators and conventional tangential fields – A clinical dosimetric study

Prabhakar, R; Smith, Amanda M.; Hagekyriakou, Jim; Hughes, Jeremy; Lonski, Peta; Howard, Beth; Osbourne, Glen; Orr, Kylie; Kaur, Ravneet; Kron, Tomas

doi:10.1016/j.zemedi.2021.04.003

Cited by 3 publications

(1 citation statement)

References 30 publications

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“…The use of ionization chambers, calibrated against primary standards,[ 3 , 4 ] ensures the precise measurement of absolute dose delivered to the tumor volume. Complementing this approach, thermoluminescent dosimeters,[ 5 ] metal–oxide–semiconductor field-effect transistors,[ 6 ] semiconductor detectors such as diodes,[ 7 ] and diamond detectors[ 8 ] have been used. In addition, optically stimulated luminescence dosimeters,[ 9 ] calorimeters,[ 10 ] and alanine-based dosimeters[ 11 ] contribute to the quantification of the dose administered to cancer patients.…”

Section: Introductionmentioning

confidence: 99%

Design and Development of a Low-cost Integrated Dosimeter for External Beam Dosimetry in Radiation Oncology

Chant,

Ramachandran

2023

Journal of Medical Physics

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Radiation dosimeters play a crucial role in radiation oncology by accurately measuring radiation dose, ensuring precise and safe radiation therapy. This study presents the design and development of a low-cost printed circuit board (PCB) dosimeter and an integrated electrometer with sensitivity optimized for dose rates intended for use in megavoltage radiation therapy. The PCB dosimeter was designed in KiCad, and it uses a low-cost S5MC-13F general-purpose 1 kV 5A power diode as a radiation detector. The dosimeter is calibrated against a known dose derived from an ionization chamber and tested for dose linearity, dose rate dependence, field size dependence, and detector orientation dependence. The observed average dose differences between the delivered and measured doses for most measurements were found to be < 1.1%; the dose rate linearity between 100 MU/min and 1400 MU/min was found to be within 1.3%. This low-cost architecture could successfully be adapted further for a scalable, cost-effective dosimetry solution through firmware or circuit design.

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Section: Introductionmentioning

confidence: 99%

Design and Development of a Low-cost Integrated Dosimeter for External Beam Dosimetry in Radiation Oncology

Chant,

Ramachandran

2023

Journal of Medical Physics

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Evaluation of the effect of silicone implants in a breast radiotherapy treatment: A Monte Carlo approach

de Cássia Justino,

Neves,

Belinato

et al. 2023

Radiation Physics and Chemistry

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Thyroid and contralateral breast surface dose variation in mammography: a phantom study on the role of breast tissue composition

Ekinci,

Aşlar

2024

Eur. Phys. J. Plus

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The organs of the thyroid and contralateral breast can be exposed to radiation because of scattered x-rays during mammography. It is important to determine the dose values of these quantities in terms of the risk of triggering a second cancer induction for both organs. In the present study, thyroid and contralateral breast surface doses were investigated with LiF:Mg,Ti (TLD-100) dosimeters for three types of BR-12 phantoms with glandularity/fat tissue ratios (70%/30%, 50%/50% and 30%/70%) over four views as in the real patient situation in Mo/Mo and Mo/Rh anode/filter combinations in each phantom thickness as opposed to a single glandular/fat tissue commonly used in the literature. Both thyroid and contralateral surface doses increased with increasing both phantom thickness and glandularity/fat ratio. The thyroid surface doses changed within 0.06–0.18 mGy and 0.05–0.14 mGy according to phantom thickness of 2 to 6 cm for the glandularity/adipose of 50%/50% in the Mo/Mo and Mo/Rh, respectively. On the other hand, the contralateral breast surface doses were within 0.35–1.39 mGy and 0.40–0.99 mGy for 50%/50% in the Mo/Mo and Mo/Rh, respectively. Based on a 70%/30% breast composition with a phantom thickness of 6 cm, the thyroid and contralateral breast surface doses increased by approximately 40% compared with 50%/50% for both Mo/Mo and Mo/Rh. These results showed that both thyroid and contralateral breast surface doses significantly depend on the glandularity/fat composition of the breast. Therefore, the outputs of this study may contribute to future studies aimed at reducing the doses received by organs during examination.

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Contralateral breast dose with electronic compensators and conventional tangential fields – A clinical dosimetric study

Cited by 3 publications

References 30 publications

Design and Development of a Low-cost Integrated Dosimeter for External Beam Dosimetry in Radiation Oncology

Design and Development of a Low-cost Integrated Dosimeter for External Beam Dosimetry in Radiation Oncology

Evaluation of the effect of silicone implants in a breast radiotherapy treatment: A Monte Carlo approach

Thyroid and contralateral breast surface dose variation in mammography: a phantom study on the role of breast tissue composition

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