Photodensitometer measurements of images on radiographs
Abstract
An X-ray photodensitometer provided accurate and precise measurements of linear dimensions on radiograph images. These measurements helped to infer the hidden dimensions of objects radiographed. Systematic errors caused the errors in absolute value to be considerably higher in some cases. Many deterrents to successful measurement arose, including film grain noise, excessive density range and edge penetration, blurring, interfering structures, and scattered radiation. Film grain noise, in particular, limited the resolution of small details in a radiograph. Because of so many deterrents, the applicability of the measurement method used appeared quite limited.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- March 1976
- Bibcode:
- 1976STIN...7717441T
- Keywords:
-
- Densitometers;
- Photometers;
- Radiography;
- X Ray Analysis;
- Blurring;
- Error Analysis;
- Resolution;
- X Ray Density Measurement;
- Instrumentation and Photography