Evaluation Of The Contrast Ratio Of Intensified Fluoroscopic Imaging Systems

Raymond P. Rossi; Neil Bromberg

doi:10.1117/12.933833

29 December 1982 Evaluation Of The Contrast Ratio Of Intensified Fluoroscopic Imaging Systems

Raymond P. Rossi, Neil Bromberg

Proceedings Volume 0347, Application of Optical Instrumentation in Medicine X; (1982) https://doi.org/10.1117/12.933833
Event: Application of Optical Instrumentation in Medicine X, 1982, New Orleans, United States

Abstract

Large area contrast loss in image intensifiers results in reduced performance at low spatial frequencies and may limit the imaging capabilities of such systems for structures of clinical interest having inherently low subject contrast. The contrast ratio of image intensifiers is a measure of large area contrast loss which may be evaluated under laboratory conditions by photometric techniques. Unfortunately such techniques are not readily extended to clinically installed systems. A technique for the measurement of contrast ratio on clinically installed systems, incorporating a film recording camera, is proposed which eliminates the requirement of having a precise knowledge of the film's characteristic curve. The results of measurements obtained with this technique on clinical systems, as well as comparison of this technique to photometric measurements under laboratory conditions are presented, along with a discussion of the associate problems and pitfalls.

Citation Download Citation

Raymond P. Rossi and Neil Bromberg "Evaluation Of The Contrast Ratio Of Intensified Fluoroscopic Imaging Systems", Proc. SPIE 0347, Application of Optical Instrumentation in Medicine X, (29 December 1982); https://doi.org/10.1117/12.933833

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