Physics of accelerators for radiation therapy

Khan, Faiz M.

doi:10.1016/0360-3016(84)90618-7

Cited by 92 publications

(157 citation statements)

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“…Nominal values for d max ranges from 0 to 5 cm (orthovoltage X-ray beams to 25 MV photon beams) were extensively reported in literature. 1,2 This study presents d max for a reference FS 10 cm × 10 cm at SSD 100 cm, for both FF and FFF of 6 and 10 MV photon beams.…”

Section: Depth Of Dose Maximum (D Max )mentioning

confidence: 99%

“…This is due to the forward moving nature of high energy photons. 1,2 In general, field size for FF photon beams is defined at 50% of intensity level along the central axis. In FFF beam the 50% intensity level occurs at high gradient region (sharply descending part) of the beam profile.…”

Section: 7mentioning

confidence: 99%

“…It is introduced into the path of the beam to reduce excess radiation intensity of bremsstrahlung radiations originating from the transmission target. 1,2 In the recent past, linear accelerators have been manufactured without flattening filters as additional option known as Flattening Filter Free (FFF) beams. The removal of a flattening filter results in increased dose rate, reduced mean energy, reduction in head leakage and lateral scattering, which have all shown advantageous in special treatment procedures.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of physical parameters and determination of inflection point for Flattening Filter Free beams in medical linear accelerator

Pichandi

Ganesh

Amalraj

et al. 2014

Reports of Practical Oncology & Radiotherapy

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Section: Depth Of Dose Maximum (D Max )mentioning

confidence: 99%

Section: 7mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Analysis of physical parameters and determination of inflection point for Flattening Filter Free beams in medical linear accelerator

Pichandi

Ganesh

Amalraj

et al. 2014

Reports of Practical Oncology & Radiotherapy

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“…Além disso, são apresentados os dados de comissionamento desta modalidade no Hospital das Clínicas de São Paulo utilizando a comparação de três tipos de detectores para medidas de dose de entrada durante tratamentos de irradiação de corpo inteiro. (Khan, 1984). A função do TBI é destruir as células tumorais e a medula óssea dos receptores e imunosuprimir os pacientes suficientemente para evitar rejeição da medula óssea transplantada.…”

Section: Introductionunclassified

“…O TBI tem ação no corpo inteiro incluindo as áreas santuário onde a quimioterapia pode não ser efetiva. Além disso, partes selecionadas do corpo tais como pulmão, rins, e cabeça podem ser protegidas se necessário (Khan, 1984).…”

Section: Introductionunclassified

Implementação da irradiação de corpo inteiro em radioterapia

Habitzreuter¹

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Neste trabalho estão descritos todos os parâmetros e medidas necessárias para a implementação da irradiação de corpo inteiro numa instalação projetada para tratamentos convencionais, e que faz uso de geometrias não convencionais para gerar os tamanhos de campos alargados. Além disso, são apresentados os dados de comissionamento desta modalidade no Hospital das Clínicas de São Paulo utilizando a comparação de três tipos de detectores para medidas de dose de entrada durante tratamentos de irradiação de corpo inteiro. 4 IMPLEMENTATION OF TOTAL BODY IRRADIATION IN RADIOTHERAPY Ângela Beatriz Habitzreuter ABSTRACTBefore implementing a treatment technique, the characteristics of the beam under irradiation conditions must be well acknowledged and studied. Each one of the parameters used to calculate the dose has to be measured and validated before its utilization in clinical practice. This is particularly necessary when dealing with special techniques.In this work, all necessary parameters and measurements are described for the total body irradiation implementation in facilities designed for conventional treatments that make use of unconventional geometries to generate desired enlarged field sizes. Furthermore, this work presents commissioning data of this modality at Hospital das Clínicas of São Paulo using comparison of three detectors types for measurements of entrance dose during total body irradiation treatment.

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Clinical in vivo dosimetry using optical fibers

Gripp

Haesing

Bueker

et al. 1998

Radiat. Oncol. Investig.

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Discoloring of glass due to ionizing radiation depends on the absorbed dose. The radiation‐induced light attenuation in optical fibers may be used as a measure of the dose. In high‐energy photon beams (6 MV X rays), a lead‐doped silica fiber can be calibrated. A dosimeter based on an optical fiber was developed for applications in radiation therapy. The diameter of the mounted fiber is 0.25 mm, whereas the length depends on the sensitivity required. To demonstrate the applicability, a customized fiber device was used to determine scattered radiation close to the lens of the eye. Measurements were compared with TLDs (LiF) in an anthropomorphic phantom. The comparison with TLD measurements shows good agreement. In contrast to TLD, optical fibers provide immediate dose values, and the readout procedure is much easier. Owing to its small size and diameter, interesting invasive dose measurements are feasible. Radiat. Oncol. Invest. 6:142–149, 1998. © 1998 Wiley‐Liss, Inc.

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Physics of accelerators for radiation therapy

Cited by 92 publications

References 0 publications

Analysis of physical parameters and determination of inflection point for Flattening Filter Free beams in medical linear accelerator

Analysis of physical parameters and determination of inflection point for Flattening Filter Free beams in medical linear accelerator

Implementação da irradiação de corpo inteiro em radioterapia

Clinical in vivo dosimetry using optical fibers

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