[DEXA (dual-energy x-ray absorptiometry) and DPA (dual photon absorptiometry) in densitometry of the femoral neck: correlation of the measurements of three commercially available instruments].
The bone mineral density measurements of three different instruments at the femoral head were compared using 12 cadaver specimens. Two of these instruments were operated by x-rays (dual energy x-ray absorptiometry = DEXA), whereas one system was based on a gadolinium source (dual photon absorptiometry = DPA). Although excellent correlation between the measurements was obtained (r greater than 0,9), the measurements of one of the DEXA-instruments were significantly higher than the measurements of the two other systems. We conclude that a comparison of bone mineral density measurements obtained on different densitometry instruments may pose problems. Follow-up examinations should be done on one single densitometry unit.
Hübsch
P
P
Abteilung für Diagnostische Radiologie, II. Medizinische Universitätsklinik Wien.
Schneider
B
B
Seidl
G
G
Kalchhauser
G
G
Klaushofer
K
K
Popovic
R
R
D015502:Absorptiometry, Photon / Q000295:instrumentation*; D015519:Bone Density / Q000502:physiology*; D005272:Femur Neck / Q000000981:diagnostic imaging / Q000502:physiology*; D006801:Humans; D066298:In Vitro Techniques; D011877:Radionuclide Imaging
DEXA und DPA zur Densitometrie des Schenkelhalses: Korrelation der Messwerte dreier handelsüblicher Geräte.