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.

Abstract

PURPOSE:

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.

RESULTS:

There was a reduction in DAP for all procedures: PTA lower extremities 31% (12-8 Gy cm(2)), PTA/stenting pelvis 67% (134-44 Gy cm(2)), nephrostomy 39% (7-4 Gy cm(2)), and varicocele 70% (37-11 Gy cm(2)). 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.

CONCLUSION:

DAP and ESD from the X-ray system were reduced for all procedures. The reduction was greater in the more radiation-demanding procedures.

• Authors: Kristin Jensen, Livia Zangani, Anne Catrine Martinsen, Gunnar Sandbæk
• Journal: Cardiovascular and interventional radiology (Cardiovasc Intervent Radiol) Vol. 34 Issue 4 Pg. 717-22 (Aug 2011) ISSN: 1432-086X [Electronic] United States
• PMID: 21069332 (Publication Type: Comparative Study, Journal Article)

Topics

• Angioplasty (instrumentation)
• Embolization, Therapeutic
• Fluoroscopy (instrumentation)
• Humans
• Lens, Crystalline (radiation effects)
• Male
• Nephrostomy, Percutaneous
• Occupational Exposure
• Phantoms, Imaging
• Radiation Dosage
• Radiology, Interventional (instrumentation)
• Radiometry (methods)
• Stents
• Time and Motion Studies
• Varicocele (therapy)