Order of magnitude reduction of fluoroscopic x-ray dose

Abhinav Bal; Normand Robert; Lindsay Machan; Meir Deutsch; David Kisselgoff; Paul Babyn; John A. Rowlands

doi:10.1117/12.912760

23 February 2012 Order of magnitude reduction of fluoroscopic x-ray dose

Abhinav Bal, Normand Robert, Lindsay Machan, Meir Deutsch, David Kisselgoff, Paul Babyn, John A. Rowlands

Proceedings Volume 8313, Medical Imaging 2012: Physics of Medical Imaging; 831356 (2012) https://doi.org/10.1117/12.912760
Event: SPIE Medical Imaging, 2012, San Diego, California, United States

Abstract

The role of fluoroscopic imaging is critical for diagnostic and image guided therapy. However, fluoroscopic imaging can require significant radiation leading to increased cancer risk and non-stochastic effects such as radiation burns. Our purpose is to reduce the exposure and dose to the patient by an order of magnitude in these procedures by use of the region of interest method. Method and Materials: Region of interest fluoroscopy (ROIF) uses a partial attenuator. The central region of the image has full exposure while the image periphery, there to provide context only, has a reduced exposure rate. ROIF using a static partial attenuator has been shown in our previous studies to reduce the dose area product (DAP) to the patient by at least 2.5 times. Significantly greater reductions in DAP would require improvements in flat panel detectors performance at low x-ray exposures or a different x-ray attenuation strategy. Thus we have investigated a second, dynamic, approach. We have constructed an x-ray shutter system allowing a normal x-ray exposure in the region of interest while reducing the number of x-ray exposures in the periphery through the rapid introduction, positioning and removal of an x-ray attenuating shutter to block radiation only for selected frames. This dynamic approach eliminates the DQE(0) loss associated with the use of static partial attenuator applied to every frame thus permitting a greater reduction in DAP. Results: We have compared the two methods by modeling and determined their fundamental limits.

Citation Download Citation

Abhinav Bal, Normand Robert, Lindsay Machan, Meir Deutsch, David Kisselgoff, Paul Babyn, and John A. Rowlands "Order of magnitude reduction of fluoroscopic x-ray dose", Proc. SPIE 8313, Medical Imaging 2012: Physics of Medical Imaging, 831356 (23 February 2012); https://doi.org/10.1117/12.912760

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available