SU1308319A1 - Method of ultrasonic diagnosis of condition of bone tissues - Google Patents

Abstract

This invention relates to ultrasound medical diagnostics, intended for traumatology, orthopedics, and endocrinology. The purpose of the invention is to reduce the time of localization of the disease and eliminate the influence of the thickness of soft tissues. The device with the help of which the proposed method is implemented contains a generator 1 connected to an ultrasound emitter 2 in an ultrasonic head 3. Receivers 4 are located in the nose with the ends located in the same plane. The receivers are connected to a switch 5 connected by several wires to a meter with 6 time intervals, the output of which is connected through the shift register 7 to the indicator 8. To diagnose the condition of bone tissues, they are sounded by ultrasonic signals, received by the transmitters equal distance from each other, determined from the conditions of y / n-1, where X is the distance between adjacent receivers; y is the change in the thickness of soft tissues; n is the number of receivers. Diagnostics is performed based on the time difference between the propagation of signals between adjacent receivers. 1 il. Ati + Atj-t-At 3 (O

Description

This invention relates to ultrasound medical diagnostics and can be used in traumatology, orthotics and endocrinology.,

The purpose of the invention is to reduce the time of localization of the disease and eliminate the influence of the thickness of soft tissues.

The drawing shows a device that implements the proposed method of ultrasound diagnosis.

the head wave, formed in bone tissue, propagates along the longitudinal part of its surface. During the propagation of the front of the head wave, due to the bulk elasticity of the bone tissue, continuous emission of ultrasonic energy into soft tissue occurs at a critical angle relative to the direction of propagation, which is perceived by receivers 4, which convert it into electrical signals. The CeSposing method consists in the fact that, for the diagnosis of a forest-like device, apply a device such as

so that the alleged location of the defect in the bone is under the receivers 4. Due to the small distance between the adjacent receivers 4, the change in the thickness of the soft tissues is insignificant and represents

 constant value. The signals from receivers 4 arrive at the switch 5, which selects a group consisting, for example, of four neighboring receivers 4, and transmits the signals of this group to the meter 6 time intervals. The selected group at each signal from generator 1 varies. In the 6 time slot meter, the time shifts of received signals between adjacent receivers 4 are measured and averaged. The averaged values of the time shifts are entered into the shift register 4 and indicated on the indicator 8.

The bones of the state of the bone tissue are sounded by ultrasound signals, they receive the most advanced signals by receivers installed at a straight line at the same distance from each other, determined from the condition

X -at y / p-1

where X is the distance between adjacent receivers;

y is the change in the thickness of soft tissues;

n is the number of receivers. The input ends of the receivers lie in the same plane. Diagnostics is performed based on the time difference between the propagation of signals between adjacent receivers.

The device, with which the proposed method is implemented, contains a generator 1 connected to an ultrasound emitter 2 installed in an ultrasonic head 3. Receivers 4 are also located in an ultrasonic head 3, and they are installed on a straight line at the same distance. from the friend (see the formula), their ends are located in one plane. Piezo receivers 4 are connected with com25

Claims (1)

Invention Formula The method of ultrasound diagnostics of bone tissue conditions is soft by sounding ultrasound signals and measuring the time difference between signals propagating between adjacent receivers, characterized in that Mutator 5, which is connected by several 35 shortening disease localization times with a 6 time interval meter, the output of which is connected via shift register 7 to indicator 8. The signal from the second output of generator 1 is fed to the control inputs of switch 5, the meter 6 time intervals, shift register 7 and indicator 8. Example. The proposed device is placed on the patient's soft tissues at an arbitrary angle to the bone under study and includes a generator 1. The generator 1, using 45 ultrasonic radiator 2, excites ultrasonic vibrations, and and excluding the influence of the thickness of soft tissues, the reception of signals is carried out by receivers mounted on a straight line at the same distance from each other, determined from the condition X f. y / n-1, where X is the distance between adjacent receivers; y is the change in the thickness of soft tissues; n is the number of receivers, and the input ends of the receivers lie in the same plane. the head wave, formed in bone tissue, propagates along the longitudinal part of its surface. During the propagation of the front of the head wave, due to the bulk elasticity of the bone tissue, continuous emission of ultrasonic energy into soft tissue occurs at a critical angle relative to the direction of propagation, which is perceived by receivers 4, which convert it into electrical signals. It is advisable to impose a device so Invention Formula The method of ultrasound diagnostics of bone tissue conditions is soft by sounding ultrasound signals and measuring the time difference between signals propagating between adjacent receivers, characterized in that  reducing the time of localization of the disease reducing the time of localization of the disease and excluding the influence of the thickness of soft tissues, the reception of signals is carried out by receivers mounted on a straight line at the same distance from each other, determined from the condition X f. y / n-1, where X is the distance between adjacent receivers; y is the change in the thickness of soft tissues; n is the number of receivers, and the input ends of the receivers lie in the same plane.