Radiation Eye Dose for Physicians in CT Fluoroscopy-Guided Biopsy

Abstract

It is important to evaluate the radiation eye dose (3 mm dose equivalent, Hp (3)) received by physicians during computed tomography fluoroscopy (CTF)-guided biopsy, as physicians are close to the source of scattered radiation. In this study, we measured the radiation eye dose in Hp (3) received by one physician during CTF in a timeframe of 18 months using a direct eye dosimeter, the DOSIRISTM. The physician placed eye dosimeters above and under their lead (Pb) eyeglasses. We recorded the occupational radiation dose received using a neck dosimeter, gathered CT dose-related parameters (e.g., CT-fluoroscopic acquisition number, CT-fluoroscopic time, and CT-fluoroscopic mAs), and performed a total of 95 procedures during CTF-guided biopsies. We also estimated the eye dose (Hp (3)) received using neck personal dosimeters and CT dose-related parameters. The physician eye doses (right and left side) received in terms of Hp (3) without the use of Pb eyeglasses for 18 months were 2.25 and 2.06 mSv, respectively. The protective effect of the Pb eyeglasses (0.5 mm Pb) on the right and left sides during CTF procedures was 27.8 and 37.5%, respectively. This study proved the existence of significant correlations between the eye and neck dose measurement (right and left sides, R2 = 0.82 and R2 = 0.55, respectively) in physicians. In addition, we found significant correlations between CT-related parameters, such as CT-fluoroscopy mAs, and radiation eye doses (right and left sides, R2 = 0.50 and R2 = 0.52, respectively). The eye dose of Hp (3) received in CTF was underestimated when evaluated using neck dosimeters. Therefore, we suggest that the physician involved in CTF use a direct eye dosimeter such as the DOSIRIS for the accurate evaluation of their eye lens dose.

Evaluation of a New Real-Time Dosimeter Sensor for Interventional Radiology Staff

“…Dosimeters placed in the vicinity of the lens, such as the Eye-D and DOSIRIS, can also be used [ 26 , 48 , 49 , 50 , 51 , 52 ]; the passive DOSIRIS dosimeter, which does not provide real-time monitoring, was designed to measure the lens dose, but the real-time i3 system may be more effective for reducing occupational doses. The use of dosimeters such as the i3 will be valuable in situations such as IVR, in which exposure doses are high and instantaneous monitoring is required [ 53 , 54 , 55 , 56 , 57 , 58 ].…”

Precision Imaging Guidance in the Era of Precision Oncology: An Update of Imaging Tools for Interventional Procedures

“…The main concern of CT guidance is the radiation dose to the interventional radiologist and the patients [ 70 ] even if some studies reported values in line with recommended dose limits for occupational radiation exposure [ 71 ]. To reduce the time needed for placing the probe/needle and therefore the radiation dose, some navigation systems have been developed to assist lung biopsies and thermal ablation therapies, and studies demonstrated that CT assisted with stereotactic navigation reduces the time for ablation probe placement, the number of needle adjustments, skin punctures, and fluoroscopy time [ 72 , 73 ].…”

Fundamental study on diagnostic reference level quantities for endoscopic retrograde cholangiopancreatography using a C-arm fluoroscopy system

“…Fluoroscopy guided interventional procedure is associated with the risk of radiation exposure to patients and medical staff [1][2][3][4][5][6][7][8][9]. Therefore, it is important to optimise radiation protection for patients and medical staff [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28]. Endoscopic retrograde cholangiopancreatography (ERCP) is an essential procedure in the diagnosis and treatment of hepatobiliary diseases, but with the development of treatment devices and techniques, increased radiation exposure to patients and medical staff is a critical issue [29][30][31][32][33][34][35][36][37][38][39][40].…”