NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Linear Calibration of Radiographic Mineral Density Using Video-Digitizing MethodsRadiographic images can provide quantitative as well as qualitative information if they are subjected to densitometric analysis. Using modern video-digitizing techniques, such densitometry can be readily accomplished using relatively inexpensive computer systems. However, such analyses are made more difficult by the fact that the density values read from the radiograph have a complex, nonlinear relationship to bone mineral content. This article derives the relationship between these variables from the nature of the intermediate physical processes, and presents a simple mathematical method for obtaining a linear calibration function using a step wedge or other standard.
Document ID
19970023978
Acquisition Source
Ames Research Center
Document Type
Reprint (Version printed in journal)
Authors
Martin, R. Bruce
(California Univ. Davis, CA United States)
Papamichos, Thomas
(California Univ. Davis, CA United States)
Dannucci, Greg A.
(California Univ. Davis, CA United States)
Date Acquired
August 17, 2013
Publication Date
January 1, 1990
Publication Information
Publication: Calcified Tissue International
Publisher: Springer-Verlag
Volume: 47
Subject Category
Aerospace Medicine
Report/Patent Number
NASA-CR-204905
NAS 1.26:204905
Accession Number
97N72228
Funding Number(s)
CONTRACT_GRANT: NAG2-455
Distribution Limits
Public
Copyright
Public Use Permitted.
Document Inquiry

Available Downloads

There are no available downloads for this record.
No Preview Available