An initial investigation of a wireless patient radiation dosimeter for use in interventional radiology
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An initial investigation of a wireless patient radiation dosimeter for use in interventional radiology Yohei Inaba1,2 · Koichi Chida1,2 · Yuuki Murabayashi1 · Mime Endo1 · Kazuki Otomo1 · Masayuki Zuguchi1 Received: 20 March 2020 / Revised: 9 July 2020 / Accepted: 10 July 2020 © Japanese Society of Radiological Technology and Japan Society of Medical Physics 2020
Abstract Radiation exposure during interventional radiology (IR) procedures is a critical issue. We have developed a wireless realtime dosimeter for IR patients that use nontoxic phosphor (four sensors). We evaluated the basic performance parameters (such as dose linearity, batch uniformity, reproducibility, and wireless-communication conditions) of the developed system using an IR X-ray system. Further, we investigated the influence of noise from other medical equipment on our wireless realtime dosimeter in the IR X-ray room. Overall, our wireless system exhibited excellent performance in terms of uniformity, reproducibility, and linearity; moreover, the wireless communication performance was better. The developed system enabled real-time visualization of patient radiation dose, without noise contamination from other medical equipment. In addition, the wireless system can be easily installed in a location where the PC screen (display) can be readily viewed by the IR physician. Hence, we developed a wireless system that can display the patient radiation dose data in real time; the system performed satisfactorily upon application in radiation dosimetry. Therefore, our wireless system will facilitate the real-time monitoring/ management of patient radiation dose during IR. Keywords Interventional radiology (IR) · Radiation safety · Dosimetry · Radiation protection · Radiation dose · Fluoroscopy
1 Introduction Medical procedures can expose patients and medical staff to risks associated with medical radiation procedures that involve ionizing radiations [1–8]. Radiation exposure during interventional radiology (IR) procedures is a critical issue, and we must perform the radiation dose monitoring for both patients and staff [9–17]. Passive dosimeters, such as thermoluminescent dosimeters (TLDs) and radiophotoluminescent glass dosimeters (RGDs) can accurately measure patients’ skin radiation doses in IR [18, 19]. However, real-time measurements are not feasible using such dosimeters (TLDs and RGDs). * Koichi Chida [email protected] 1
Department of Radiological Technology, Tohoku University Graduate School of Medicine, 2‑1 Seiryo, Aoba, Sendai 980‑8575, Japan
Division of Disaster Medicine, International Research Institute of Disaster Science, Tohoku University, 6‑6‑4, Aoba, Sendai 980‑8579, Japan
2
The skin dose monitor (SDM™; McMahon Medical) and MIDSOF™ (AcroBio Corporation) devices can measure patients’ skin radiation doses in real-time during IR procedures, but they have only a single radiation sensor [20]. Furthermore, the SDM™ is no longer produced because it uses a zinc–cadmium sensor that contains a toxic substance. Although the PSD™ (Unf
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