发明名称 |
Ultrasonic image processing method and device, and ultrasonic image processing program |
摘要 |
An ultrasonic image processing method and device, and an ultrasonic image processing program which can correspond to analytical methods different depending on a region or the purpose of a diagnosis or treatment. The ultrasonic image processing method comprises an image data creation step which stores a detection result obtained by irradiating a subject with ultrasonic waves by an irradiating section and detecting an ultrasonic signal from the subject by a detecting section and creates at least two-frame image data different in detection timing on the basis of the stored detection result, a motion vector distribution image creation step which creates a motion vector distribution image on the basis of a predetermined motion vector analysis through the use of a plurality frames of the image data, and a conversion step which converts a vector distribution image to a scalar distribution image on the basis of a plurality of established regions of interest (ROI). |
申请公布号 |
US9119557(B2) |
申请公布日期 |
2015.09.01 |
申请号 |
US200913128350 |
申请日期 |
2009.10.29 |
申请人 |
HITACHI MEDICAL CORPORATION |
发明人 |
Masui Hironari;Azuma Takashi |
分类号 |
A61B8/00;A61B8/08;G06T7/20 |
主分类号 |
A61B8/00 |
代理机构 |
Brundidge & Stanger, P.C. |
代理人 |
Brundidge & Stanger, P.C. |
主权项 |
1. An ultrasonic image processing method comprising:
an irradiation step of irradiating ultrasonic waves to a subject; a detection step of detecting an ultrasonic signal of the subject; an image data production step of storing a result of the detecting the ultrasonic signal, and producing a plurality of frames of image data items, detection timings of which are different from each other, from the stored result of the detecting the ultrasonic signal; a motion-vector distribution image production step of producing a motion-vector distribution image of a plurality of motion vectors using at least two of the plurality of frames through predetermined motion-vector analysis processing; a selection step of selecting a conversion method for converting the motion-vector distribution image into a scalar-distribution image; and a conversion step of converting the motion-vector distribution image into the scalar-distribution image according to the selected conversion method, wherein the conversion step is executed in accordance with directions of the plurality of motion vectors produced in the motion-vector distribution image production step, and wherein at the conversion step:
a small region of interest (ROI) to be noted is set within a motion-vector distribution, beam-direction components and azimuthal-direction components within the ROI are permuted with real-number components and imaginary-number components respectively, and the motion-vector distribution within the ROI is converted into a complex matrix,a first-order spatial differential filter is applied to each of a beam direction and an azimuthal direction within the ROI in order to calculate derivative information, a rotation operation is implemented based on the derivative information in order to determine a scalar value, and a scalar distribution is produced from scalar values determined for a plurality of ROls within the motion-vector distribution, andthe motion-vector distribution in the ROI is decomposed into a beam-direction component scalar distribution and an azimuthal-direction component scalar distribution, a similarity filter is applied to each of the beam-direction component and azimuthal-direction component scalar distributions in respective directions, a smoothed vector distribution is constructed from each of the beam-direction component azimuthal-direction component scalar distributions resulting from the similarity filter application. |
地址 |
Tokyo JP |