Ultrasonic probe calibration phantom and system as well as ultrasonic probe calibration method

Abstract

The invention provides an ultrasonic probe calibration phantom and system. A concaved groove is formed in the middle position of the upper surface of the ultrasonic probe calibration phantom, a plurality of taper holes are formed in the side surface of the ultrasonic probe calibration phantom, a two-dimensional ultrasonic probe is fixedly connected in the concave groove, NDI puncture probes are inserted into the taper holes, and tip ends of the NDI puncture probes can be acquired through ultrasound images. According to the ultrasonic probe calibration system adopting the structure, a neutral surface of the ultrasonic plane can just pass by the neutral surface of the ultrasonic probe calibration phantom along the middle seams, and the neutral surface of the ultrasonic plane just uses the tip ends of the NDI puncture probes, and the problem that a ''dot-type'' phantom and a two-dimensional ''surface-type'' phantom cannot be aligned to the ultrasonic plane is well solved. Besides, the invention further provides an ultrasonic probe calibration method.

Description

technical field [0001] The invention relates to the technical field of ultrasonic images, in particular to an ultrasonic probe calibration phantom, a system and a calibration method thereof. Background technique [0002] Ultrasound imaging has been widely used in ultrasound image-guided interventional surgery and reconstruction of three-dimensional volume data. However, ordinary two-dimensional ultrasound probes do not have peripheral positioning equipment, so ultrasound image data cannot be directly used in surgery. Therefore, there must be a positioning device capable of establishing a corresponding transformation relationship with the ultrasound imaging plane. The ultrasonic probe calibration is the process of determining the transformation relationship between the position sensor coordinate system fixed on the ultrasonic probe and the two-dimensional ultrasonic imaging plane coordinate system. [0003] In the calibration algorithm of the ultrasonic probe, the design an...

AI Technical Summary

Problems solved by technology

However, the sound field of the ultrasonic probe diffuses as the scanning depth increases, and the ultrasonic imaging plane is not an ideal geometric plane

The imaging surface with a certain thickness intersects the linear target, and the projection of the emitting target on the ideal imaging plane is not comparable to a point, thus forming a linear or even arc-shaped bright spot feature point. However, this spot is picked up manually or automatically. There are large errors and uncertainties in the coordinates of the mark points, which causes the error in the three-dimensional coordinate reconstruction calculation of the N-shaped target to increase, resulting in the loss of the original coplanarity in this process, which in turn causes the decline in calibration accuracy.

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