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THE APPLICABILITY OF RADIOPHOTOLUMINESCENCE DOSEMETER (RPLD) FOR MEASURING MEDICAL RADIATION (MR) DOSES

机译:放射光剂量计(RPLD)在测量医疗辐射(MR)剂量中的适用性

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摘要

The applicability of radiophotoluminescence dosimetry was determined by assessing various radiophotoluminescence dose-meter (RPLD) properties for measuring medical radiation doses from radiation sources of a continuous spectrum. The RPLD was found to be accurate for measuring doses in diagnostics (50-125 keV) and radiation therapy (6, 10 and 18 MV photons, 6 and 15 MeV electrons). The RPLD shows excellent dose linearity (R~2 > 0.99), reproducibility and batch uniformity, and minimal fading and accurate accumulated dose measurement. The dosemeter material is independent of photon energy in the diagnostic range; however, the dosemeter requires additional calibration in the mammography energy range and also for accurate dose measurement with photon or electron energies in radiation therapy. RPLD measurements with a tin filter show considerable angular dependence at angles exceeding 50° between the photon beam and the normal to the long axis of the dosemeter. The RPLD measurement accuracy at high doses can be improved with optimised pre-heating schemes.
机译:通过评估各种用于测量来自连续光谱辐射源的医学辐射剂量的放射光致发光剂量计(RPLD)属性,确定放射光致发光剂量法的适用性。发现RPLD在诊断(50-125 keV)和放射治疗(6、10和18 MV光子,6和15 MeV电子)中测量剂量是准确的。 RPLD具有出色的剂量线性(R〜2> 0.99),重现性和批次均匀性,并且褪色最小,并且累积剂量测量准确。剂量计材料与诊断范围内的光子能量无关;但是,剂量计需要在乳房X线照相能量范围内进行额外校准,并且还需要在放射治疗中使用光子或电子能量进行准确的剂量测量。用锡滤光片进行的RPLD测量表明,在光子束与剂量计长轴法线之间的角度超过50°时,角度依赖性很大。优化的预热方案可以提高高剂量下的RPLD测量精度。

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  • 来源
    《Radiation Protection Dosimetry》 |2012年第1期|p.1-9|共9页
  • 作者单位

    Physical Sciences, Biophysics, University of Oulu, Oulu, Finland,Department of Diagnostic Radiology, Oulu University Hospital, Oulu, Finland;

    Department of Oncology and Radiotherapy, Oulu University Hospital, Oulu, Finland;

    Department of Diagnostic Radiology, Oulu University Hospital, Oulu, Finland,Department of Medical Technology, Box 5000, FIN-90014 University of Oulu, Finland;

  • 收录信息 美国《科学引文索引》(SCI);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
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