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Subtraction radiography and computer assisted densitometric analyses of standardized radiographs
Author(s) -
Ortman L. F.,
Dunford R.,
McHenry K.,
Hausmann E.
Publication year - 1985
Publication title -
journal of periodontal research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.31
H-Index - 83
eISSN - 1600-0765
pISSN - 0022-3484
DOI - 10.1111/j.1600-0765.1985.tb00849.x
Subject(s) - radiography , subtraction , densitometry , nuclear medicine , medicine , dental alveolus , radiology , conventional radiography , dentistry , mathematics , arithmetic
A standardized radiographic series of incrementally increasing alveolar crestal defects in skulls were subjected to analyses by subtraction radiography and computer assisted quantitative densitometric analysis. Subjects were able to detect change using subtraction radiography in alveolar bone defects with bone loss in the range of 1–5 percent as measured by 125 I absorptiometry. Quantitative densitometric analyses utilizing radiographic pairs adjusted for differences in contrast (gamma corrected) can be used to follow longitudinal changes at a particular alveolar bone site. Such measurements correlate with change observed by 125 I absorptiometry (r= 0.82–0.94).