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 consists of an ultrasonic parameter measuring unit, a sensor unit and a bone densitometer mechanical driving unit. The ultrasonic parameter measuring unit comprises a control communication module, a time measurement module, an ultrasonic transmitting / receiving switching module, an ultrasonic excitation module, an ultrasonic receiving module and a transmitting and receiving probe set module. Two transmitting and receiving probes are adopted for measuring the widths of soft tissues on the two sides of the calcaneus respectively, and a timing chip is adopted for timing; and the width difference of the soft tissues of the calcaneus and the error of the sound velocity difference of the soft tissues and the calcaneus are eliminated. A temperature sensor measures the body surface temperature of the calcaneus part, the sound velocity of the soft tissues of the calcaneus is corrected according to the body surface temperature, and the measuring precision is improved. Each transmitting and receiving probe is provided with a thin film pressure sensor, and the consistency of the clamping force of the calcaneus is guaranteed. A ball screw pair and a two-way guide rail transmission structure are adopted, and the central symmetry of the motion of the transmitting and receiving probes is guaranteed. A solid-state coupling auxiliary probe generates an ultrasonic transmission channel, and the measuring precision is further improved.

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

Images