Vergleichende Messung des Knochenmineralgehaltes mit DPA und DPX - Erste klinische Erfahrungen

Autor:	B. Kempers, M. Fischer, J. Spitz, M. Stoecker, N. Clemenz
Rok vydání:	1990
Předmět:	medicine.medical_specialty Reproducibility Materials science Bone density Radiation dose medicine Bone mineral content Radiology Nuclear Medicine and imaging Whole body Imaging phantom Surgery Biomedical engineering
Zdroj:	RöFo - Fortschritte auf dem Gebiet der Röntgenstrahlen und der bildgebenden Verfahren. 152:340-344
ISSN:	1438-9010 1438-9029
DOI:	10.1055/s-2008-1046880
Popis:	A technically satisfactory method with adequate precision and reproducibility is necessary for accurate determination of bone mineral content. To the previously described techniques (SPA, DPA, QCT and SQCT) a new method has been added based on the absorption of a filtered x-ray beam (DPX). Comparison of DPA/DPX measurements of the mineral contents of vertebrae and femora in 126 patients showed a high correlation between the results (r = 0.97 for vertebrae and 0.93 for femoral necks). Ten measurements of a vertebral phantom and ten measurements of a normal male showed significantly higher accuracy of the DPX method. Other advantages of the DPX method are increased speed of the procedure by a factor 3-5, lower radiation dose and better spatial resolution. Measurements of the upper and lower extremities are possible in addition to whole body scans. In summary, the DPX technique is a significant improvement on the conventional DPA method, whereas the data obtained from DPA measurements remain valid.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::df9faf54819a2a0f2ee6e9d1eaef558c https://doi.org/10.1055/s-2008-1046880 Zobrazit plný text záznamu