Experimental evaluation of out-of-field dose for different high-energy electron beams and applicators used in external beam radiotherapy

Gul, Osman Vefa

doi:10.1016/j.radphyschem.2023.111345

Cited by 9 publications

(4 citation statements)

References 23 publications

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“…While out-of-eld electron doses may seem less signi cant than photon beams, they should be considered in electron therapy due to the absence of a secondary cancer threshold, with dose values dependent on energy, applicator dimensions, and depth [27].…”

Section: Peripheral Dosementioning

confidence: 99%

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Peripheral doses outside the electron applicators in an Elekta Versa HD Linac

Maharaj,

Goodall,

Sabet

et al. 2024

Preprint

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Background Radiotherapy is an essential component of cancer treatment, but healthy tissues can be exposed to out-of-field doses, potentially causing adverse effects and secondary cancers. This study investigates peripheral doses outside the electron beam applicator in an Elekta Versa HD linear accelerator. Methods Peripheral doses outside the electron applicator were measured using 6, 9, and 12 MeV beams at their respective maximum dose depths while maintaining a 100 cm source-to-surface distance. Measurements employed EBT3 films within solid water phantoms. The influence of field size on penumbra width and peripheral doses were examined using various cutouts (6 x 6 cm², 10 x 10 cm², and a 5 cm diameter circle) within a 10 × 10 cm² applicator, with gantry and collimator angles set to 0 degrees. Additionally, the impact of collimator angles on penumbra width and peripheral doses was explored, enhancing the understanding of dose distribution. Measured profiles were also compared with those calculated using Monaco treatment planning system. Results Findings showed that both penumbra width and peripheral dose values increased with energy across different field sizes and collimator angles. Root Mean Square Deviation (RMSD) analysis indicated deviations of 1.8 mm for penumbra and 1.1% for peripheral doses between measured profiles and Treatment Planning System (TPS) predictions for all field sizes. Notably, peripheral doses remained below 5% of the maximum dose at distances ranging from 10 to 15 mm away from the field edges, suggesting the potential for implementation of supplementary shielding strategies. Conclusion This study highlights the critical importance of considering peripheral doses in radiotherapy, emphasizing the need to evaluate the impact on healthy tissues outside the primary treatment area to ensure patient safety and mitigate long-term treatment-related side effects. The findings underscore the necessity of implementing appropriate measures to minimize peripheral doses.

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Section: Peripheral Dosementioning

confidence: 99%

“…Physical penumbra was determined based on the International Commission on Radiation Units and Measurements (ICRU) Report 62 guidelines which de nes it as the distance between the 20% and 80% isodose curves (Fig. 1-6) at the depth of the maximum dose (D max ) [27].…”

Section: Calculation Of Physical Parametersmentioning

confidence: 99%

Peripheral doses outside the electron applicators in an Elekta Versa HD Linac

Maharaj,

Goodall,

Sabet

et al. 2024

Preprint

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“…Numerous studies have been conducted on radiation dosage calculation [17][18][19][20][21][22][23][24][25]. There are studies that determine the amount of radiation to which hospital personnel are exposed during surgeries in which fluoroscopy is actively used [26] or the radiation value to which the patient's oral mucosa is exposed during CT [27].…”

Section: Evaluation Of Radiation Exposure Of the Oral Cavity In C-arm...mentioning

confidence: 99%

Evaluating Radiation Exposure to Oral Tissues in C-Arm Fluoroscopy A Dose Analysis

YAZICI,

GÜNAY,

TUNÇMAN

et al. 2024

IJCESEN

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This study investigates the radiation dose to oral mucosal tissues during C-arm fluoroscopy imaging using an Alderson Rando phantom and thermoluminescent dosimeters (TLD-100) for precise measurements. The aim is to assess the potential risks for patients and healthcare personnel exposed to ionising radiation during these procedures. The Alderson Rando phantom, a human-equivalent model, was utilized to simulate radiation exposure in a controlled environment. TLD-100 dosimeters were strategically positioned in the 6th section of the phantom and exposed to radiation at intervals of 0.5, 1, 2, 4, and 8 minutes. The experiments were carried out at Hisar Hospital Intercontinental and the dosimeter readings were then evaluated at Çekmece Nuclear Research Centre. The study demonstrated that the mean radiation doses affecting the internal tissue of the oral mucosa were 0.912 mSv (0.5 minutes), 1.604 mSv (1 minute), 2.719 mSv (2 minutes), 6.763 mSv (4 minutes), and 13.811 mSv (8 minutes). The mean radiation doses affecting the lip skin tissue were 1.423 mSv (0.5 minutes), 2.435 mSv (1 minute), 5.2 mSv (2 minutes), 10.195 mSv (4 minutes), and 17.404 mSv (8 minutes). Results indicate a direct relationship between radiation dose and exposure time, with increasing doses observed at longer exposure times. This research aims to improve patient safety during C-arm scope imaging procedures by determining precise radiation dosage levels for oral mucosal tissues and addressing the lack of published reference values in the literature.

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“…The distinction between artificial and natural ionizing radiation holds significant importance for human health, thus prompting extensive academic exploration in this domain. These investigations have utilized diverse methodologies [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. Artificially generated radiation finds extensive applications in diverse sectors, including nuclear technology and healthcare.…”

Section: Introductionmentioning

confidence: 99%

Determining the Radiation Dose Levels the Kidney is Exposed to in Kidney Stone Fragmentation Procedures

Sengul,

Gunay,

Kekeç

et al. 2024

IJCESEN

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This study examines the radiation dose levels to which the kidney is exposed during kidney stone fragmentation procedures that utilize scopy imaging. The assessment was conducted using the Alderson Rando phantom and Thermoluminescent Dosimeter (TLD). The study examined various exposure parameters and measured the radiation dose to the kidney over time. The results suggest a direct correlation between exposure duration and radiation dose, emphasizing the need to monitor radiation levels during fluoroscopic interventions, especially due to the kidneys' sensitivity to radiation. Future research should concentrate on optimizing scopy settings to minimize radiation exposure while ensuring diagnostic accuracy and patient safety.

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Experimental evaluation of out-of-field dose for different high-energy electron beams and applicators used in external beam radiotherapy

Cited by 9 publications

References 23 publications

Peripheral doses outside the electron applicators in an Elekta Versa HD Linac

Peripheral doses outside the electron applicators in an Elekta Versa HD Linac

Evaluating Radiation Exposure to Oral Tissues in C-Arm Fluoroscopy A Dose Analysis

Determining the Radiation Dose Levels the Kidney is Exposed to in Kidney Stone Fragmentation Procedures

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