TLD Correction Factor for Dose Delivery Verification on Gamma Radiation Cobalt-60 on Clinical Treatment

Prasetio, Heru; Milvita, Dian; Djarwani, S. S.

doi:10.1007/978-3-642-03474-9_103

Cited by 2 publications

(2 citation statements)

References 2 publications

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“…A pattern of increased responses was noticed for the shallow dose, where Hp (10) and Hp (0.07) for the Cs-137 source were 3.72x10 -6 and 5.97x10 -6 mGy/count and for the X-ray source were 3.44x10 -6 and 4.05x110 -6 mGy/count respectively. To support this point, a study by Prasetio et al investigated two calibration methods that showed that dose at surface (84.365cGy/µC) was considerably higher than dose in phantom (56.158cGy/µC) at 5cm depth with an exposure dose of 100-4000mGy (16). It was observed that irrespective of the dose applied, CF response of skin or surface dose is higher in terms of numerical values compared to those of the deep dose.…”

Section: Discussionmentioning

confidence: 99%

Determination of Calibration Factors and Uncertainties Associated with the Irradiation of MTS-N (LiF: Mg, Ti) Chips with Cesium-137 and X-ray Sources Under Low Doses for Personal Dosimetry in Diagnostic Radiology

Omojola¹,

Akpochafor

Adeneye

et al. 2021

JGR

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Purpose: The purpose of this study was to compare calibration factors for deep dose equivalent Hp (10) and shallow dose equivalent Hp (0.07) between Cesium (Cs)-137 and X-ray sources when they are exposed to same dose and to determine uncertainties with MTS-N (LiF: Mg, Ti) chips when they are exposed to low dose ≤ 2mGy. Material and Methods: Thermoluminescent (TL) chips were annealed at 400oC for one hour and allowed to cool and were subjected to a temperature of 100oC for another two hours using a TLD Furnace Type LAB-01/400. They were then taken to a Secondary Standard Dosimetry Laboratory (SSDL) for irradiation using a Cs-137 source at known doses (0.2-2mGy). A RadPro Cube 400 manual TLD Reader was used to determine corresponding TL signal. The above process was replicated but with a calibrated X-ray unit as the source for calibration. Results: The calibration factors (CF) from the line graph of dose (mGy) against TL signal (count) for Cs-137 source with Hp (10) and Hp (0.07) were 3.72 x 10-6 and 5.97x10-6 mGy/count respectively. Those with X-ray source for Hp (10) and Hp (0.07) were 3.44x10-6 and 4.05x10-6 mGy/count respectively with an overall coefficient of determination (R2) = 0.99. The adjusted maximum percentage deviation between the actual and calculated dose for both sources was -2.74%. The percent (%) deviation of the mean with both sources for Hp (10) and Hp (0.07) was 3.9% and 19% respectively. Conclusion: Adjusted percent deviation from both sources were within the recommended dose limit of ±30% by the Radiological Protection Institute of Ireland (RPII) and within the International Commission on Radiological Protection (ICRP) limit respectively. Better accuracy was seen for Hp (10) with both sources compared to Hp (0.07). Calibration of the MTS-N chips using both sources was successful and can be used for personal dosimetry.

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Section: Discussionmentioning

confidence: 99%

Determination of Calibration Factors and Uncertainties Associated with the Irradiation of MTS-N (LiF: Mg, Ti) Chips with Cesium-137 and X-ray Sources Under Low Doses for Personal Dosimetry in Diagnostic Radiology

Omojola¹,

Akpochafor

Adeneye

et al. 2021

JGR

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“…Thermoluminescence dosimeter (TLD) is characterized by its ability of measure superficial dose even with electron beam [12], and Cobalt 60 using SSD technique [13], either with external beam radiotherapy [14] , dose to anterior rectal wall in prostate cancer through proton therapy [15], high dose rate (HDR) brachytherapy to minimize positional uncertainty [16].…”

Section: Introductionmentioning

confidence: 99%

Dose Verification with diode versus TLD as in-vivo dosimeters for external radiotherapy

Yassin

Shahat

Attalla

et al. 2020

Egypt. J. Biophys. Biomed. Engng.

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TLD Correction Factor for Dose Delivery Verification on Gamma Radiation Cobalt-60 on Clinical Treatment

Cited by 2 publications

References 2 publications

Determination of Calibration Factors and Uncertainties Associated with the Irradiation of MTS-N (LiF: Mg, Ti) Chips with Cesium-137 and X-ray Sources Under Low Doses for Personal Dosimetry in Diagnostic Radiology

Determination of Calibration Factors and Uncertainties Associated with the Irradiation of MTS-N (LiF: Mg, Ti) Chips with Cesium-137 and X-ray Sources Under Low Doses for Personal Dosimetry in Diagnostic Radiology

Dose Verification with diode versus TLD as in-vivo dosimeters for external radiotherapy

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