title: Physician-received scatter radiation with angiography systems used for interventional radiology: comparison among many X-ray systems.
abstract: Radiation protection for interventional radiology (IR) physicians is very important. Current IR X-ray systems tend to use flat-panel detectors (FPDs) rather than image intensifiers (IIs). The purpose of this study is to test the hypothesis that there is no difference in physician-received scatter radiation (PRSR) between FPD systems and II systems. This study examined 20 X-ray systems in 15 cardiac catheterisation laboratories (11 used a FPD and 9 used an II). The PRSR with digital cineangiography and fluoroscopy were compared among the 20 X-ray systems using a phantom and a solid-state-detector electronic pocket dosemeter. The maximum PRSR exceeded the minimum PRSR by ~12-fold for cineangiography and ~9-fold for fluoroscopy. For both fluoroscopy and digital cineangiography, the PRSR had a statistically significant positive correlation with the entrance surface dose (fluoroscopy, r = 0.87; cineangiography, r = 0.86). There was no statistically significant difference between the average PRSR of FPDs and IIs during either digital cineangiography or fluoroscopy. There is a wide range of PRSR among the radiography systems evaluated. The PRSR correlated well with the entrance surface dose of the phantom in 20 X-ray units used for IR. Hence, decreasing the dose to the patient will also decrease the dose to staff.
authors: Department of Radiological Technology, Faculty of Medicine, School of Health Sciences, Tohoku University, 2-1 Seiryo, Aoba, Sendai 980-8575, Japan. chida@mail.tains.tohoku.ac.jp
authors: Koichi
authors: K
authors: Chida
authors: Yoshiaki
authors: Y
authors: Morishima
authors: Youhei
authors: Y
authors: Inaba
authors: Masaaki
authors: M
authors: Taura
authors: Ayako
authors: A
authors: Ebata
authors: Ken
authors: K
authors: Takeda
authors: Hirotaka
authors: H
authors: Shimura
authors: Masayuki
authors: M
authors: Zuguchi
mesh_terms: D006328:Cardiac Catheterization / Q000295:instrumentation* / Q000379:methods; D002932:Cineangiography / Q000295:instrumentation* / Q000379:methods; D005471:Fluoroscopy / Q000295:instrumentation* / Q000379:methods; D006801:Humans; D016273:Occupational Exposure / Q000032:analysis* / Q000517:prevention & control; D019047:Phantoms, Imaging; D010820:Physicians; D011829:Radiation Dosage; D015641:Radiography, Interventional; D015642:Radiology, Interventional / Q000295:instrumentation / Q000379:methods; D012542:Scattering, Radiation