Radiographic Densitometry Research Articles

The relationship of dietary calcium intake to radiographic bone density in normal and osteoporotic persons.

Lifetime daily calcium intake was estimated through interview of 398 individuals from 15 to 90 years of age. The correlation of calcium intake with vertebral mineralization as determined by quantitative radiographic densitometry was low but persistently significant.

Estimation of changes in bone calcium content by radiographic densitometry.

A point of conflict often arises when investigators of calcium mobility (as determined by metabolic balance studies) meet with investigators of radiographic bone densitometry (1–6). This is the apparent inability to explain the magnitude of change sometimes observed by densitometry with that thought physiologically possible by proponents of metabolic balance technics. The opinion has often been expressed that changes detectable by quantitative x-ray densitometry are unexplainable on the basis of metabolic balance studies in which a daily negative calcium balance on the order of 500 mg is considered to be high while 500 mg of calcium represents only 0.03 per cent of the entire skeleton. How then can reported changes in radiographic density on the order of 5 to 10 per cent within a single bone (7) be explained on the basis of metabolic balance studies? The described investigation was carried out in an attempt to reconcile the apparent discrepancies between the two methods of measuring bone turnover rate. Th...

In vivo assessment of skeletal morphology by radiographic densitometry.

The Journal of PeriodontologyVolume 38, Issue 6P2 p. 667-673 In Vivo Assessment of Skeletal Morphology by Radiographic Densitometry Harry Israel, Harry IsraelSearch for more papers by this author Harry Israel, Harry IsraelSearch for more papers by this author First published: 01 November 1967 https://doi.org/10.1902/jop.1967.38.6_part2.667Citations: 6AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat Citing Literature Volume38, Issue6P2November-December 1967Pages 667-673 RelatedInformation

QUANTITATIVE ASSESSMENT OF THE MINERAL CONTENT OF BONE: PRELIMINARY INVESTIGATION.

A number of methods for determining the quantity of mineral in bones have been considered. The use of radioisotopes of calcium and strontium in uptake studies of bone lesions has been briefly reviewed. Comparative sensitivities of the radiographic and radioisotopic methods have been indicated, and the use of 47Ca for sequential studies on skeletal tumours has been mentioned as a possibility. High accuracy in determining bone mineral concentration can be achieved by the use of transmission dose techniques provided that low energy X rays are used, but measurements are restricted to regions with only small quantities of overlying soft tissue. The morphological technique affords the simplest approach to an assessment of the patient's clinical condition, but the technique cannot be considered to give a reliable estimate of the quantity of bone mineral present. Microradiography eliminates the effect of soft tissue by the use of biopsy and a low X-ray kilovoltage, but evaluation at the same site at successive time intervals is not possible. Some problems encountered in the radiographic densitometry technique, and their solution by a suitable experimental method, have been described. The possible use of a double kilovoltage technique (currently under investigation) in bypassing the limitations of a single kilovoltage method has been outlined, and future applications of the technique have been proposed.