Scanning device and scanning method for ultrasonic elastography

Abstract

The invention discloses a scanning device and method of ultrasound elasticity imaging. The scanning device comprises a computer, an ultrasound probe connected to the computer, a support for fixing the ultrasound probe, a motion control device and a depth sensor. The motion control device and the depth sensor are respectively connected to the computer. The support is arranged on the motion control device comprising a three-dimensional motion control mechanism for controlling the ultrasound probe to perform three-dimensional motions and a rotating motion control mechanism for controlling the ultrasound probe to rotate. The three-dimensional motion control mechanism and the rotating motion control mechanism are respectively connected to the computer. The ultrasound probe can be controlled through the three-dimensional motion control mechanism and the rotating motion control mechanism to tightly fit the tissue surface and to be parallel to normal vectors of scanning points during each scanning, so that the ultrasound probe is guaranteed being perpendicular to the scanned tissue surface, and pressure beard by each scanning point is guaranteed being even and constant before and after compressing.

Description

technical field [0001] The invention belongs to the technical field of medical three-dimensional ultrasonic elastography, and in particular relates to a scanning device for ultrasonic elastography and a scanning method thereof. Background technique [0002] Elasticity is an important parameter to characterize the physical properties of a substance. Measuring the elasticity of a certain substance or imaging its distribution of elastic properties is a very important means for understanding the properties and structure of the substance. Among them, tissue elasticity plays an important role in diseases. The diagnosis has important reference value. Ultrasound elastography can provide tissue elasticity information that is closely related to the pathological state of tissue abnormalities. Ultrasound elastography obtains the waveforms of ultrasonic echo signals under two different pressures at the same position in the region of interest through the probe, and uses the two echo signa...

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Problems solved by technology

When scanning based on these two scanning methods, it is difficult to keep the pressure of the probe on the scanned tissue uniform and constant, and the speed and direction of the probe movement will also change, so it has a great impact on the generated elastic image

Although the traditional mechanical positioning scanning method can ensure the constant moving speed and direction of the probe, because the surface depth information of the detected tissue cannot be obtained accurately in advance, there will be two problems: no contact with the tissue or excessive pressure on the tissue during the scanning process. situation, that is, it is still impossible to ensure that the pressure of the probe on the tissue being scanned is uniform and constant

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