Experimental Comparison of Automatic TLD Readout Systems

Casal, E.; jongwon, Gil; Lorca, N.; Martínez, José María Sainz

doi:10.1093/oxfordjournals.rpd.a080596

Cited by 3 publications

(1 citation statement)

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“…Be sides out door mea sure ments, pas sive do sim e ters are also used for mea sure ments in in door en vi ron ments [9][10][11]. Many de vel op ments in TLD ma te ri als and in TL read ers (e.g., au tom a ti za tion) [12] have led to in creased use of this type of do sim e ters in en vi ron men tal do sim e try.…”

Section: Introductionmentioning

confidence: 99%

Review of the thermoluminescent dosimetry method for the environmental dose monitoring

et al. 2021

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Passive solid state dosimeters, such as thermoluminescence dosimeters, provide integrated measurement of the total dose and are widely used in environmental monitoring programs. The objective of this paper is to provide a comprehensive review on the use of thermoluminescent dosimetry methods for monitoring radiation dose in the environment. The article presents the part of the research results of the project PREPAREDNESS (EMPIR 2016 call for Metrology for Environment joint research project) with a particular objective to harmonize procedures used by dosimetry services, relevant authorities and Institutes across the Europe. To achieve this, different monitoring routines that are based on passive environ mental dosimetry methods are investigated. Differences in performing specific steps such as preheating, reading, annealing, minimizing fading, and others, are analyzed. The investigation was performed by means of qualitative literature review that showed the lack of information about specific steps. The conclusion of this work is that thermoluminescent dosimetry measurement system has to be type-tested even though the testing procedure is complicated. In addition to this, control dosimeters should be introduced, International Organization for Standardization protocols should be followed during calibration, and finally, parameters influencing the measurement uncertainty have to be identified and well understood in order to pro duce ac cu rate dose measurement results.

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Section: Introductionmentioning

confidence: 99%

Review of the thermoluminescent dosimetry method for the environmental dose monitoring

et al. 2021

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“PCL” a new automatic fast reader suitable for in vivo dosimetry

Marinello

Barthe

Pollack

et al. 1992

Radiotherapy and Oncology

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Radiation doses to patients undergoing standard radiographic examinations: a comparison between two methods

Tsapaki

Tsalafoutas²,

Chinofoti³

et al. 2007

BJR

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The objective of the study was to derive a mathematical method for calculating the entrance surface dose (ESD) from exposure factors for all tube potentials used in clinical practice and to compare the calculated ESDs (ESD(C)) with those measured (ESD(TLD)) using thermoluminescent dosemeters (TLDs). The exposure parameters of 43 patients who underwent (a) posteroanterior (PA) and lateral (LAT) chest examination (13 patients), (b) supine abdomen (10 patients), (c) erectus abdomen (10 patients), or (d) urinary tract examination (10 patients) were recorded. Patient ESD was directly measured by TLDs and calculated from exposure factors. The differences between ESD(C) and ESD(TLD) were quite small and could be explained by the uncertainties involved in both methods, in all but the PA chest examination where the ESD(C) was about 50% larger than ESD(TLD). However, in PA chest the ESD(TLD) was close to the minimum detectable dose of TLDs, questioning the accuracy of ESD(TLD). Further investigation showed that using the high tube potential technique (130 kV) in the PA chest examination resulted in very short exposure times, in the region of 4 ms. In such short exposure times, the X-ray generator operation presented stability problems that led to loss of output linearity and consequently to false calculation of ESD. The calculation method offers a reliable and cheap alternative to the measurement of ESD by TLD, provided that the exposure times are not as short as in the PA chest examinations recorded in this study, so that the output linearity with tube current-time product (mAs) is maintained.

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Experimental Comparison of Automatic TLD Readout Systems

Cited by 3 publications

References 0 publications

Review of the thermoluminescent dosimetry method for the environmental dose monitoring

Review of the thermoluminescent dosimetry method for the environmental dose monitoring

“PCL” a new automatic fast reader suitable for in vivo dosimetry

Radiation doses to patients undergoing standard radiographic examinations: a comparison between two methods

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