Radiation dose for normal organs by helical tomotherapy for lung cancer

Tseng, Hsien-Chun; Liu, Wen-Shan; Tsai, Huei‐Ting; Chu, Hsin-Yi; Lin, Jye-Bin; Chen, Chien-Yi

doi:10.1016/j.apradiso.2015.04.007

Cited by 5 publications

(35 citation statements)

References 29 publications

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“…Dose conformity can increase to the tumor during faster delivery time, fewer monitor units and superior dose distribution. [3] Between 9500 and 10,500 patients who with various pathologies, NPC, have been treated at CSMUH in 2014. Unfortunately, no previous studies have addressed the secondary environment radiations in the vault rooms that can occur as a result of Axesse linac use.…”

Section: Axesse Linacmentioning

confidence: 99%

“…A detailed survey of environment radiations in vault rooms is important to both patients and the public. [3,4] However, these secondary X-ray radiations minor are a health consideration for both patients and the publics. [5] The Rando phantom (Alderson Radiation Therapy Phantom) (Radiology Support Devices Inc., Long Beach, CA) with height 175 cm and weight 73.5 kg.…”

Section: Axesse Linacmentioning

confidence: 99%

“…However, Axesse generates high-energy radiations that exposed patients to undesirable radiations during oncology therapy treatments. [1][2][3][4] Patients are exposed to significant radiations due primarily to out-of-field 6 MV X-rays. These radiations are not discussed in ordinary treatment plan, and few researches have focused on the spread of secondary radiations into the environment around the Department of Radiation Oncology (DRO).…”

Section: Introductionmentioning

confidence: 99%

“…These radiations are not discussed in ordinary treatment plan, and few researches have focused on the spread of secondary radiations into the environment around the Department of Radiation Oncology (DRO). [3] In addition, a detailed survey is needed to measure the secondary radiations around the vault room of medical university. The problem of 6 MV photons spread into the vault room may require additional attention.…”

Section: Introductionmentioning

confidence: 99%

“…The problem of 6 MV photons spread into the vault room may require additional attention. Thermoluminescent dosimetry (TLD-100H), 3.0 Â 3.0 Â 1.0 mm 3 (Harshaw Chemical Company, Solon, OH) has been employed to measure threedimensional distributions of environment radiations. [5,6] Intensive effort can allow quantitative measurement of environment radiations, as well as the effective provision of data to elaborate radiation safety.…”

Section: Introductionmentioning

confidence: 99%

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Evaluating environment radiations at Axesse linac undergoing NPC treatment of VMAT

Chen

Tseng

Pan

et al. 2016

Computer Assisted Surgery

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Environment radiations in vault rooms resulting from Axesse linac use was assessed at Medical University Hospital using Thermoluminescent dosimeters (TLDs) during the use of the new radiation treatment known as volumetric modulated arc therapy (VMAT) in the treatment of nasopharyngeal cancer (NPC). The TLD-100H was calibrated using linac 6 MV photons. A total of 75 measurement points of the TLD-100H were utilized for environmental monitoring. The measured environment radiations were then visualized as three-dimensional graphical representations. Environment radiations were visualized using colored three-dimentional graphical representations. The radiations in NPC treatment of Rando phantom was found to reach levels up to 370 mSv/treatment. Many researchers consider TLD, which is the most cost-effective method to environment radiations. The minimum detectable dose (MDD) was also identified to demonstrate the reliability of the TLD approach. Quantitative results that provide practical guidance with regarded radiation protections. Potentially hazardous of secondary radiations from the operating linac is evaluated with regard to its potential health effects on both patients and the public. KEY POINTSThis work tried to evaluate the environment radiation and minimal detectable limit of TLD inside the LINAC maze.

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Section: Axesse Linacmentioning

confidence: 99%

Section: Axesse Linacmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Evaluating environment radiations at Axesse linac undergoing NPC treatment of VMAT

Chen

Tseng

Pan

et al. 2016

Computer Assisted Surgery

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Radiation doses with various body weights of phantoms in brain 128-slice MDCT examination

Lin

Lai

Tseng

et al. 2019

Journal of Radiation Research

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The effective dose (HE) and organ or tissue equivalent dose (HT) for use in brain computed tomography (CT) examinations with various body weights were evaluated. Thermoluminescent dosimeters (TLD-100H) were inserted into Rando and five anthropomorphic phantoms. These phantoms were made of polymethylmethacrylate (PMMA), according to the specifications of ICRU 48, with masses from 10 to 90 kg. Brain CT examinations were conducted, scanning the maxillae from the external auditory meatus to the parietal bone using a 128-slice multi-detector CT (MDCT) scanner. To reduce errors, three independent trials were conducted. Calculated HE,TLD, based on the weighting factor recommended by ICRP 103, was 1.72 ± 0.28 mSv, which slightly exceeds the HE,DLP of 1.70 mSv, that was calculated from the dose–length product (DLP) of the Rando phantom. This experiment yielded HE,TLD values of ICRP 103 from the highest 1.85 ± 0.28 (90 kg) to the lowest 1.47 ± 0.22 (10 kg) mSv. HE,TLD (mSv) = 5.45×10−3 W(kg) + 1.361, with an R2 of 0.87667. Using the DLP protocol, HE,DLP was estimated from CTDIvol that was recorded directly from the console display of the CT unit and multiplied by the conversion coefficient (k) recommended by the ICRP 103. Finally, the experimental results obtained herein are compared with those in the literature. Physicians should choose and adjust protocols to prevent the exposure of patients to unnecessary radiation, satisfying the as low as reasonably achievable (ALARA) principle. These findings will be valuable to patients, physicians, radiologists and the public.

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Extra radiation dose of lungs in male examinees during cardiac computed tomography

et al. 2017

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ag ing, The Af fil i ated Hos pi tal (group) of Putian Uni ver sity, Fujian, China 3 De part ment of Radiologic On col ogy, Chung Shan Med i cal Uni ver sity Hos pi tal, Chung Shan Med i cal Uni ver sity, Tai wan, Re pub lic of China 4 School of Med i cine, Chung Shan Med i cal Uni ver sity, Tai wan, Re pub lic of China, 5 De part ment of Nu clear Med i cine, Landseed Hos pi tal, Ping-jen, Tao-Yuan City, Tai wan, Re pub lic of China 6 De part ment of Med i cal Im ag ing and Ra dio log i cal Sci ences, Chung Shan Med i cal Uni ver sity, Tai wan, Re pub lic of China Sci en tific pa per

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Radiation dose for normal organs by helical tomotherapy for lung cancer

Cited by 5 publications

References 29 publications

Evaluating environment radiations at Axesse linac undergoing NPC treatment of VMAT

Evaluating environment radiations at Axesse linac undergoing NPC treatment of VMAT

Radiation doses with various body weights of phantoms in brain 128-slice MDCT examination

Extra radiation dose of lungs in male examinees during cardiac computed tomography

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