The measurement of optical density by use of a densitometer(noun)
The measurement of body density(noun)
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Use "densitometry" in a sentence
"Osteoporosis thinning of the bones: Have a bone density test, also called a densitometry or DXA scan, beginning at age sixty-five to screen for osteoporosis."
"The Center is the onlypediatric bone center in the Delaware Valleyproviding both clinicalcare and bone densitometry (DXA) interpretation."
"Simulated moving bed forms effects on real-time in-stream sediment concentration measurement with densitometry."