用于低剂量X射线测量的热释光剂量计。

Thermoluminescent dosimeters for low dose X-ray measurements.

作者信息

Del Sol Fernández S, García-Salcedo R, Sánchez-Guzmán D, Ramírez-Rodríguez G, Gaona E, de León-Alfaro M A, Rivera-Montalvo T

机构信息

Centro de Investigación en Ciencia Aplicada y tecnología avanzada-Legaria, del IPN, Av. Legaria 694, Col. Irrigación, 11500 México D.F., México.

Hospital Juárez de México, Av. Instituto Politécnico Nacional 5160, Col. Magdalena de las Salinas, 07760 México D.F., México.

出版信息

Appl Radiat Isot. 2016 Jan;107:340-345. doi: 10.1016/j.apradiso.2015.11.021. Epub 2015 Nov 11.

DOI:10.1016/j.apradiso.2015.11.021

PMID:26609683

Abstract

The response of TLD-100, CaSO4:Dy and LiF:Mg,Cu,P for a range of X-ray low dose was measured. For calibration, the TLDs were arranged at the center of the X-ray field. The dose output of the X-ray machine was determined using an ACCU-Gold. All dosimeters were exposed at the available air kerma values of 14.69 mGy within a field 10×10 cm(2) at 80 cm of SSD. Results of LiF:Mg,Cu,P X-ray irradiated showed 4.8 times higher sensitivity than TLD-100. Meanwhile, TL response of CaSO4:Dy exposed at the same dose was 5.6 time higher than TLD-100. Experimental results show for low dose X-ray measurements a better linearity for LiF:Mg,Cu,P compared with that of TLD-100. CaSO4:Dy showed a linearity from 0.1 to 60 mGy.

摘要

测量了TLD - 100、硫酸钙:镝（CaSO4:Dy）和氟化锂:镁、铜、磷（LiF:Mg,Cu,P）在一系列X射线低剂量下的响应。为进行校准，将热释光剂量计（TLD）置于X射线场的中心。使用ACCU - Gold测定X射线机的剂量输出。所有剂量计在SSD为80 cm的10×10 cm² 射野内，以14.69 mGy的可用空气比释动能值进行照射。LiF:Mg,Cu,P经X射线照射的结果显示其灵敏度比TLD - 100高4.8倍。同时，在相同剂量下硫酸钙:镝的热释光响应比TLD - 100高5.6倍。实验结果表明，对于低剂量X射线测量，LiF:Mg,Cu,P比TLD - 100具有更好的线性度。硫酸钙:镝在0.1至60 mGy范围内呈现线性。