Measurement of bone density by gas displacement.
Small bone volumes, porous and irregular structured objects with volumes 0.05-2 cm3, were measured by differential pressure of displaced air. The differential air pressure was measured by a piezoelectric resistor pressure gauge. The gas-displacement system was used to measure the volumes of 234 bone specimens for calculation of bone density. The operation of the system, calibration, sensitivity, and errors of measurement are described.
D000818:Animals; D001842:Bone and Bones / Q000033:anatomy & histology*; D004285:Dogs; D005740:Gases; D008365:Manometry / Q000379:methods*; D011312:Pressure
D005740:Gases