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Reduction of Operator Hand Exposure in Interventional Radiology With a Novel Finger Sack Using Tungsten-containing Rubber

Kosaka, Hiroyuki1; Monzen, Hajime1; Matsumoto, Kenji1; Tamura, Mikoto1; Nishimura, Yasumasa2

doi: 10.1097/HP.0000000000000992

The purpose of this study was to evaluate the x-ray shielding ability of a novel tungsten-particle-containing rubber-based finger sack for use in interventional radiology. Shielding rates for the air kerma (mGy m−1) were measured using a semiconductor dosimeter with and without the finger sack and commercial lead gloves, at a 20 cm distance from the field of view. A C-arm digital angiography system was used with x-ray tube voltages of 60, 80, 100, and 120 kVp. In addition, the 70 μm dose equivalent to the operator’s finger was measured using fluorescent glass dosimeters with and without the finger sack during interventional radiology examinations. The x-ray shielding rates for 60, 80, 100, and 120 kV x rays were 98.0 ± 0.03%, 94.8 ± 0.05%, 92.3 ± 0.12%, and 90.1 ± 0.03%, respectively, with the finger sack and 69.8 ± 0.39%, 61.0 ± 0.53%, 52.3 ± 0.52%, and 47.0 ± 0.69% with the lead gloves. The x-ray shielding rates for the fluoroscopy and cine mode with the finger sack were 91.3 ± 0.21% and 56.5 ± 0.58%, respectively, while with the lead gloves they were 96.5 ± 0.04% and 67.6 ± 0.33%. The 70 μm dose equivalent for the operator’s finger exposure dose was reduced by approximately 39.4% using the finger sack. The finger shields were more user friendly, had excellent radiation shielding ability against x rays, and should reduce finger exposure in interventional radiology.

1Department of Medical Physics, Graduate School of Medical Science, Kindai University, Osaka, Japan;

2Faculty of Medicine, Department of Radiation Oncology, Kindai University, Osaka, Japan.

For correspondence contact Hajime Monzen, Department of Medical Physics, Graduate School of Medical Science, Kindai University, 377-2 Ohno-higashi, Osaka-Sayama, Osaka 589-8511, Japan, or email at

(Manuscript accepted 7 September 2018)

The authors declare no conflicts of interest; Hajjme Monzen received a research donation from Hayakawa Rubber Co., Ltd.

© 2019 by the Health Physics Society