High-precision full-dry ultrasonic bone densitometer and measurement method

Abstract

The invention discloses a high-precision full-dry ultrasonic bone densitometer. The bone densitometer is composed of an ultrasonic parameter measurement unit, a sensor unit, and a mechanical drive unit of the bone densitometer; the ultrasonic parameter measurement unit includes control communication, time measurement, ultrasonic transmit / receive switching, ultrasonic excitation, ultrasonic receiving, and transmitting & receiving probe group modules. Two transmitting & receiving probes were used to measure the width of the soft tissue on both sides of the calcaneus, and the timing chip timed; the error of the difference in the width of the soft tissue of the calcaneus and the difference in the speed of sound between the soft tissue and the calcaneus was eliminated. The temperature sensor measures the body surface temperature of the calcaneus, and corrects the sound velocity of the calcaneal soft tissue with reference to the body surface temperature to improve the measurement accuracy. The transmitting & receiving probe is equipped with a thin film pressure sensor to ensure the consistency of the calcaneal clamping force; the ball screw pair + bidirectional guide rail transmission structure ensures the center symmetry of the transmitting & receiving probe movement. The solid-state coupling auxiliary probe generates an ultrasonic transmission channel, which further improves the measurement accuracy.

Description

technical field [0001] The invention belongs to the field of ultrasonic transmission bone densitometer. In particular, it refers to the bone densitometer and measurement method that use transmitting & receiving probes, timing chips, temperature and pressure sensors, ball screw pairs of bidirectional guide rails, and solid-state coupling auxiliary probes. Background technique [0002] Osteoporosis (Osteoporosis, OP) is a common degenerative disease, especially a disease that is prevalent in the elderly population. The bone loss of OP patients is systemic. Once the bone loss occurs, there is no effective treatment to restore the bone quality under the current medical level. The only way to treat it is to rely on the early diagnosis of osteoporosis. OP is characterized by the decline of bone density and quality. Among many inspection methods, bone mineral density (BMD: bone mineral density) measurement is the first choice in the industry. [0003] BMD measurement methods incl...

AI Technical Summary

Problems solved by technology

[0007] 2. Uncertainty in temperature

[0009] 4. Coupling uncertainty

Regrettably, for the shortcomings of the measurement accuracy of the full-dry ultrasonic transmission bone densitometer, no one has paid attention to the solution from the concept of system engineering; the demand for improving measurement accuracy has not been met for a long time

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