Evaluation of Peak Skin Doses and Lens Doses during Interventional Neuroradiology Using a Direct Measurement System

Satoru Kawauchi; Koichi Chida; Takashi Moritake; Yusuke Hamada; Shogo Yoda; Hideyuki Sakuma; Wataro Tsuruta; Yuji Matsumaru

doi:10.5797/jnet.oa.2022-0024

Evaluation of Peak Skin Doses and Lens Doses during Interventional Neuroradiology Using a Direct Measurement System

J Neuroendovasc Ther. 2022;16(10):491-497. doi: 10.5797/jnet.oa.2022-0024. Epub 2022 Jul 14.

Authors

Satoru Kawauchi^{1

2

3}, Koichi Chida², Takashi Moritake⁴, Yusuke Hamada¹, Shogo Yoda¹, Hideyuki Sakuma¹, Wataro Tsuruta⁵, Yuji Matsumaru⁶

Affiliations

¹ Department of Radiology, Toranomon Hospital, Tokyo, Japan.
² Department of Radiological Technology, Tohoku University Graduate School of Medicine, Sendai, Miyagi, Japan.
³ Okinaka Memorial Institute for Medical Research, Tokyo, Japan.
⁴ Department of Radiation Regulatory Science Research, National Institute of Radiological Sciences, National Institute for Quantum Science and Technology, Chiba, Chiba, Japan.
⁵ Department of Endovascular Neurosurgery, Toranomon Hospital, Tokyo, Japan.
⁶ Division for Stroke Prevention and Treatment, Department of Neurosurgery, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan.

Abstract

Objective: In interventional neuroradiology (INR), the evaluation of the peak skin dose (PSD) and lens dose is important because the patient radiation dose increases in cases in which the procedure is more difficult and complex. This study evaluated the radiation doses during INR procedures using a direct measurement system.

Methods: Radiation dose measurements during INR were performed in 332 patients with unruptured aneurysm (URAN), dural arteriovenous fistula (DAVF), and arteriovenous malformation (AVM). The PSD and bilateral lens doses were analyzed for each disease. The Pearson correlation test was used to determine whether the PSD and lens doses were linearly related to the reference air kerma (K_a,r).

Results: In all cases, the PSD and right and left lens doses were 2.36 ± 1.28 Gy, 114.2 ± 54.6 mGy, and 189.8 ± 160.3 mGy, respectively. The PSD and lens doses of the DAVF and AVM cases were significantly higher than those of the URAN case. The Pearson correlation test revealed statistically significant positive correlations between K_a,r and PSD, K_a,r and right lens dose, and K_a,r and left lens dose.

Conclusion: The characteristics of radiation dose in INR were clarified. Owing to the concern of increased radiation doses exceeding the threshold values in DAVF and AVM cases, protection from radiation is required. Simple regression analysis revealed the possibility of precisely predicting PSD using K_a,r.

Keywords: interventional neuroradiology; lens dose; peak skin dose; radiophotoluminescent glass dosimeter; reference air kerma.