Characteristics and Limitations of Photographic Films Used in Subtraction Radiography

Michael G. Ort; Earle C. Gregg

doi:10.1117/12.7971991

Abstract

An investigation was made to evaluate currently used subtraction radiography techniques. The first order subtraction technique was found to be adequate for conventional clinical use. However when using fine-grain high contrast films for the originals, the second order technique gave a more accurate subtraction image. The limiting factor in the sensitivity of the radiographic subtraction technique for detecting small contrast changes over an area of about 2 cm in diameter was found to be film noise and not quantum statistics. Extra-fine-grain films were compared with conventionally used films. While these extra-fine-grain films gave slightly better results, they also required x-ray exposures which would be too high for routine clinical use.

Citation Download Citation

Michael G. Ort, Michael G. Ort, Earle C. Gregg, Earle C. Gregg, } "Characteristics and Limitations of Photographic Films Used in Subtraction Radiography," Optical Engineering 15(4), 154349 (1 August 1976). https://doi.org/10.1117/12.7971991 . Submission:

ACCESS THE FULL ARTICLE

PERSONAL SIGN IN
Full access may be available with your subscription

Email or Username Forgot your username?

Password Forgot your password?

Show

Remember Email/Username on this computer

Remember Password

No SPIE account? Create an account
or Institutional Sign In via Shibboleth

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

Members: $20.00

Non-members: $25.00 ADD TO CART

Keywords/Phrases

Search In:

Publication Years