This study provides the first insight into the problem of the induced radioactivity of the construction materials of the new-generation cardiac implantable electronic devices (CIEDs). Its aim was to identify nuclear reactions and the resulting radioisotopes induced in the CIEDs by high-energy X-ray therapeutic beams generated by medical linear accelerators. The presented results allow to verify the rightness of choice of materials for investigated CIEDs. Such analysis is currently available only for the older types of the CIEDs, but not for those of the new generation. Gamma spectrometry measurements have been performed using a high-purity germanium detector (HPGe). The identification and activities of the generated radioisotopes were obtained from the measured spectra of gamma - rays from decays of the produced unstable radioisotopes. 21 radioisotopes originating from 24 nuclear reactions were identified. For all considered models of CIEDs the highest activities are from the tin isomer ^117mSn. The induced activities were relatively small, not exceeding 3.1 Bq per a 1 Gy X-ray dose to a target volume.

这项研究首次揭示了新一代心脏植入式电子设备 (CIED) 的构造材料的诱导放射性问题。其目的是确定核反应以及由医用直线加速器产生的高能 X 射线治疗束在 CIED 中诱发的放射性同位素。所呈现的结果可以验证所研究的 CIED 材料选择的正确性。这种分析目前仅适用于旧类型的 CIED，但不适用于新一代的 CIED。伽马光谱测量已使用高纯度锗检测器 (HPGe) 进行。产生的放射性同位素的鉴定和活性是从产生的不稳定放射性同位素衰变产生的伽马射线的测量光谱中获得的。确定了源自 24 次核反应的 21 种放射性同位素。对于所有考虑的 CIED 模型，最高活性来自锡异构体^117m锡。诱导的活动相对较小，每 1 Gy X 射线剂量对目标体积不超过 3.1 Bq。