Interventional procedures in radiology and cardiology are associated with high dose to the patient. Accurate dosimetry is essential and calibration of the equipment is a means to provide the necessary accuracy of dose assessment.

The objective of this work is to investigate the performance of dosimeters used in interventional procedures in different standard and non-standard X-ray radiation qualities, and to investigate potential uncertainties related to dose measurements, thus improving accuracy of patient dosimetry in interventional procedures.

Four new reference radiation qualities dedicated to interventional cardiology applications have been established, allowing calibration of dosimeters used in clinical conditions with appropriate traceability to primary standards. Testing of solid-state semiconductor detectors and thermoluminescent dosimeter properties, e.g. influence of photon energy, angle of incidence and dose rate, was performed in the standard and non-standard radiation qualities.

Both dosimeter types showed good performance in the non-standard beams during all performance tests. Solid-state dosimeters displayed weak dependence on energy, angle of incidence and dose rate, in the range defined by the manufacturer and requirements of the international standard. Thermoluminescent dosimeters displayed excellent linearity and angular dependence. The influence of energy dependence on measurement uncertainty can be reduced if appropriate radiation quality is selected for calibration.

放射科和心脏病科的介入治疗与患者的高剂量有关。准确的剂量测定是必不可少的，设备的校准是提供必要的剂量评估准确性的手段。

这项工作的目的是调查在不同标准和非标准X射线辐射质量下介入程序中使用的剂量计的性能，并调查与剂量测量相关的潜在不确定性，从而提高介入程序中患者剂量测定的准确性。

已经建立了四种专门用于介入心脏病学的新参考辐射质量，从而可以对临床条件下使用的剂量计进行校准，并且可以溯源到主要标准。在标准和非标准辐射质量下，测试了固态半导体探测器和热发光剂量计的性能，例如光子能量，入射角和剂量率的影响。

在所有性能测试期间，两种剂量计类型在非标准光束中均显示出良好的性能。固态剂量计显示出对能量，入射角和剂量率的微弱依赖性，处于制造商和国际标准要求的范围内。热发光剂量计显示出极好的线性和角度依赖性。如果选择适当的辐射质量进行校准，则可以减少能量依赖性对测量不确定度的影响。