Department of Nuclear Physics and Radiation Safety, Facility of Physics and Applied Informatics, University of Lodz, Pomorska 149/153, 90-236 Lodz, Poland.
Department of Radiological Protection, Nofer Institute of Occupational Medicine, Teresy 8, 91-348 Lodz, Poland.
Phys Med. 2018 Oct;54:117-120. doi: 10.1016/j.ejmp.2018.10.006. Epub 2018 Oct 8.
Individual dosimetry is undoubtedly one of the best methods of assessing the exposure of personnel to ionizing radiation, however in case of nuclear medicine, the method applied to measure the dose does not always present a picture of the worker's actual exposure. The highly non-homogeneous dose distribution on the hand means that the ring dosimeter, routinely used to measure the Hp(0.07), provides only approximate dose values received by fingertips, the body part most exposed to ionizing radiation. This paper is an attempt to answer the question whether the wrist dosimeter used as a replacement for the ring dosimeter is able to provide information on doses for the most exposed fragments of the hand of an employee during handling procedures with the use of radiopharmaceuticals.
Throughout measurements performed in five nuclear medicine facilities, high-sensitivity thermoluminescent detectors were used.
Correction coefficients have been determined, which constitute an amendment to be made to move from the dose recorded by the wrist dosimeter to the doses received by the most exposed hand fragments. The fingertips received on average 25 times higher doses, compared to the values recorded by the wrist dosimeter.
A wrist dosimeter can be used to measure the Hp(0.07) in nuclear medicine, including as a gauge of the most exposed parts of the hand - the fingertips. However, the applicability of correction coefficients makes it necessary to ensure a stable position of the wrist dosimeter during routine procedures.
个人剂量测定无疑是评估人员接触电离辐射的最佳方法之一，然而在核医学中，用于测量剂量的方法并不总是能反映工作人员的实际照射情况。由于手部的剂量分布极不均匀，因此通常用于测量 Hp(0.07)的指环式剂量计只能提供指尖（最容易受到电离辐射的身体部位）接收到的近似剂量值。本文试图回答一个问题，即在使用放射性药物进行操作过程中，腕式剂量计是否能够提供有关最易受辐照手部碎片的剂量信息，以此替代指环式剂量计。
在五个核医学设施中进行的整个测量过程中，使用了高灵敏度的热释光探测器。
确定了校正系数，该系数构成了从腕式剂量计记录的剂量向最易受辐照手部碎片接收的剂量的修正。与腕式剂量计记录的值相比，指尖平均接收到的剂量要高出 25 倍。
腕式剂量计可用于测量核医学中的 Hp(0.07)，包括作为手部最易受辐照部位（指尖）的指标。然而，校正系数的适用性使得在常规程序中必须确保腕式剂量计的稳定位置。
