Mechanical pressure sensing ultrasonic probe for elasticity imaging

Abstract

The invention relates to a mechanical pressure sensing ultrasonic probe for elasticity imaging, which comprises a probe core part, a handle, a probe seat, a sliding shaft, a sliding bearing, a pressure sensor and a spring. The lower end of the sliding shaft is connected with the probe core part; both ends of the spring are respectively connected with the probe seat and the upper end of the pressure sensor; the lower end of the pressure sensor is connected with the probe core part; and the handle is arranged at the top of the probe seat. The spring is arranged between the probe core part and the handle for carrying out buffering, so that the probe core part is always adhered to a checked part to carry out low-amplitude vibration, and thus, the problem of interruption of elasticity imaging, which is caused by the case that the probe core part is separated from the checked part, is avoided; the force application direction is more easily kept perpendicular to the surface of the probe core part, so that quality of elasticity imaging is improved; and moreover, the pressure sensor is arranged at the back of the probe core part, so that the stress condition of the checked part is more accurately detected and the elastic modulus of the checked part is better reflected, and thus, elasticity difference of the checked part and the surroundings thereof is more accurately judged.

Description

technical field [0001] The invention relates to an ultrasonic probe, in particular to a mechanical pressure-sensing ultrasonic probe for elastography. Background technique [0002] In the process of ultrasound elastography, it is usually necessary to use a hand-held ultrasound probe. The current hand-held ultrasound probe generally includes a probe core and a handle, and one end of the handle is connected to the probe core. When performing ultrasound elastography, depending on the experience of the examiner, hold the handle with your hand to make the core of the probe vibrate with a small amplitude to meet the requirements of elastography. Because the probe core is directly connected to the handle, it is difficult to control. When the probe core is vibrated in a small range, the probe core is easy to separate from the inspection site, resulting in intermittent elastography and affecting the quality of elastography. In addition, when the probe core is detached from the inspec...

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Problems solved by technology

[0004] Although the above-mentioned ultrasonic probe can measure the pressure of the probe core, it still has the following defects: (1) The contact area of ​​the inspection part is larger than the area of ​​the probe core. When the area of ​​the inspection part is small, the inspection part cannot be accurately judged. Elasticity difference with the surrounding; (2) Once the pressure deviates from the direction perpendicular to the surface of the probe core, the pressure at some points on the inspection site cannot be detected, and there is a pressure blind zone

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