Scanning changing interpolation method and device of ultrasonic linear-array deflexion imaging
An interpolation method and ultrasonic line technology, which are applied in measurement devices, re-radiation of sound waves, ultrasonic/sonic/infrasonic diagnosis, etc., can solve the problems of inconsistency and the interpolation result is not the most accurate, and achieve the effect of accurate interpolation result data.
Active Publication Date: 2009-06-10
SHENZHEN MINDRAY BIO MEDICAL ELECTRONICS CO LTD
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[0012] The disadvantage of the existing technology is that it uses a bilinear interpolation method, which uses the closest four points in depth for interpolation, but in fact, for ultrasound imaging, it should be used along the point spread function The interpolation data obtained by interpolation in the main direction is more accurate
Generally speaking, the main direction of the point spread function (PSF) is perpendicular to the depth direction. Therefore, for non-deflection linear array, convex array, and phased array imaging, since the PSF direction is perpendicular to the depth direction (that is, the same Depth direction) is the same, so coordinate transformation and value interpolation can be regarded as carried out in the main direction of PSF; however, for deflected line array imaging, the main direction of PSF is inconsistent with the same depth direction, if Using the conventional bilinear interpolation method, only the interpolation along the same depth direction is used instead of the interpolation along the main direction of the PSF, and the resulting interpolation results are not the most accurate
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[0024] Such as figure 2 Shown is the point spread function diagram of linear array non-deflected imaging. In the figure, the coordinate system R direction is the scanning line receiving direction (in the non-deflected case, it is equivalent to the depth direction), the θ direction is the probe direction, and the transmitting and receiving direction is along the depth Directional. Assuming that there is a point in space, then the point spread function (two-dimensional) of this point should be like figure 2 The white dot shown, because the resolution in the θ direction of general ultrasound imaging is lower than that in the R direction, the point spread function graph is a flat ellipse, and the main direction of the point spread function can be defined as the length of the ellipse. Axis direction. The point spread function describes the shape of a point in space after ultrasound imaging. It also describes the area affected by a point in space in the ultrasound image. Such as image...
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The present invention provides a method and device for transforming interpolation based on scanning of linear deflecting imaging in an ultrasonic system, the method can calculate a point most related to the point to be interpolated in the point spreading function main direction and can interpolate along the point spreading function main direction according to the deflecting angle of the scanning line, thereby obtaining more accurate interpolation result data.
Description
Technical field [0001] The present invention relates to a scan conversion interpolation method for ultrasonic imaging, and in particular to a scan conversion interpolation method for linear array deflection imaging in an ultrasonic imaging system and a device adopting the method. Background technique [0002] Medical ultrasonic imaging diagnostic equipment uses the propagation of ultrasonic waves in the human body to perform various modes of imaging by transmitting ultrasonic waves and receiving ultrasonic information scattered or reflected by human tissues. The imaging information is displayed on the display in real time. [0003] Conventional ultrasound imaging devices obtain the final image data displayed on the display through a scan conversion system. This is because the data received by the ultrasound imaging device is generally not received and synthesized according to the display pixel coordinates (that is, rectangular coordinates) on the display. The obtained ultrasound ...
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Login to View More IPC IPC(8): A61B8/00G06F17/10
CPCG01S15/8915G01S15/8918G01S7/52044G01S15/8977
Inventor 姚斌蒋勇黄勇胡勤军
Owner SHENZHEN MINDRAY BIO MEDICAL ELECTRONICS CO LTD