A pulse‐echo technique for measuring the velocity of ultrasound in the cortex of the femur in
vivo is presented. The average result for 27 asymptomatic volunteers is 3250±190 m/s. The …

The velocity of ultrasound in human cortical bone has been measured in vivo by a pulse
echo technique. The velocity is reduced in a small group of older females, compared with a …

… Coolidge Award was presented to Moses A. Greenfield for his distinguished contributions
to the field of Medical Physics. Professor Greenfield responded with a scientific address which …

The modulus of elasticity was derived by combining the velocity of ultrasound measurements
and photon absorption (Norland-Cameron method) in human cortical bone (proximal radius…

Two series of animal experiments are reported. In the first of these, the disappearance rates
of intravenously injected radioactive boluses were monitored over the heart and from a …

Trabecular bone mineral density (TBMD) was measured in vivo in the calcaneus by a new
method that uses the ratio of coherent to Compton-scattered photons arising from irradiation …

In the past our laboratory has reported a method of measuring trabecular bone mineral density
(TBMD) in the calcaneus in vivo by using the coherent‐to‐Compton scattering ratio. In the …

METHODS Twenty normal white male rats (200 & 25 gm.) of the Wistar strain were used. They
were placed in cages located in the general animal room, fed a routine Rockland rat diet …

An accurate, in vivo Am-241 excited x-ray fluorescence technique was investigated for exploring
the correlation between thyroid iodine content (TIC) and various thyroid disorders. The …

Measurements have been made of the cadmium ratios of indium foils for thicknesses ranging
from 0.012 mg/cm 2 to approximately 100 mg/cm 2 . Correction factors are presented both …