Changes in Dose-Area Product, Entrance Surface Dose, and Lens Dose to the Radiologist in a Vascular Interventional Laboratory when an Old X-ray System Is Exchanged with a New System
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The aim of this study was to compare dose-area product (DAP), entrance surface dose (ESD), and lens dose to radiologists for an old and a new X-ray system in a vascular interventional laboratory.
Materials and Methods
DAP, ESD, fluoroscopy time, number of images, and patient weight were recorded for patients undergoing the following four procedures: percutaneous transluminal angioplasty (PTA) and stenting (divided into two subgroups, lower extremities and pelvis), nephrostomy, and treatment for varicocele. Halfway through the registration period, the 9-year-old X-ray equipment was exchanged with a new system. Lens doses to the radiologist were measured.
There was a reduction in DAP for all procedures: PTA lower extremities 31% (12–8 Gy cm2), PTA/stenting pelvis 67% (134–44 Gy cm2), nephrostomy 39% (7–4 Gy cm2), and varicocele 70% (37–11 Gy cm2). The reduction in number of images was 17% (158–131), 23% (153–118), 68% (2–1), and 31% (50–35), explaining a part of the dose reduction. The reduction in ESD was 33, 60, 38, and 46%. The differences in measured lens doses indicate a dose reduction in three procedures (19–53%) and an increase in one (56%), but differences are not statistically significant.
DAP and ESD from the X-ray system were reduced for all procedures. The reduction was greater in the more radiation-demanding procedures.
KeywordsRadiation protection Dosimetry Fluoroscopy DAP ESD Lens doses Vascular intervention PTA Nephrostomy Varicocele
Conflict of interest
The authors declare that they have no conflict of interest. This study was performed independently of the manufacturer of the devices used.
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