Curvature measurement method and device for medical images
A medical image and curvature measurement technology, applied in the field of curvature measurement of medical images, can solve the problems of low measurement accuracy and inability to reflect the pathological characteristics of medical images well.
Active Publication Date: 2018-04-27
NEUSOFT MEDICAL SYST CO LTD
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[0004] Obviously, the approximate curvature of each point on the shape A measured in this way is the same, the measurement accuracy is low, and in many cases it cannot better reflect the pathological features in the medical image
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[0084] At present, when measuring the curvature of medical images, the method of approximating an ideal circle is usually used. This measurement method can only measure the approximate curvature, and the approximate curvature cannot reflect the pathological features in the medical image well in many cases. Therefore, how to more accurately measure the curvature of a point in a medical image and better reflect pathological features is an urgent problem to be solved.
[0085] In order to be able to calculate the curvature of a point to be measured in the medical image, it is necessary to fit the expression of the trajectory where the point to be measured is located, and then obtain the curvature of the point to be measured according to the fitted expression of the trajectory . When fitting the expression of the trajectory, a cubic spline interpolation algorithm can be used. A conventional idea of fitting the expression of the trajectory by the cubic spline interpolation algo...
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Embodiments of the invention provide a curvature measurement method and apparatus for a medical image. The method comprises: obtaining a track where a to-be-measured point is in the medical image; dividing the track into at least two sections; obtaining values of Mi and Mi+1 according to a three-bending-moment algorithm, wherein Mi is a second derivative of the track in a first section point, and Mi+1 is a second derivative of the track in a second section point; obtaining expressions of S'(x) and S''(x) according to the values of Mi and Mi+1; obtaining a first derivative and a second derivative of the track at the to-be-measured point according to the expressions of S'(x) and S''(x); and obtaining the curvature of the to-be-measured point according to the first derivative and the second derivative. According to the curvature measurement method and apparatus, the curvature of the to-be-measured point in the medical image can be measured more accurately, so that pathological features are reflected better.
Description
technical field [0001] The invention relates to the field of image processing, in particular to a curvature measurement method and device for medical images. Background technique [0002] Medical images refer to images used for medical purposes, for example, ultrasound images and nuclear magnetic resonance images are common medical images. For some medical images, the curvature of the medical image can reflect certain pathological features. For example, the curvature of an ultrasound image of the heart can reflect the diastole and contraction of the heart. [0003] At present, when measuring the curvature of medical images, the method of approximating an ideal circle is usually used. The specific measurement process is: in order to measure figure 1 The curvature of a point on the shape A, the ideal circle B is obtained with the geometric center of the shape A as the center, and the area of the shape A is the same as that of the ideal circle B. After obtaining the ideal...
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IPC IPC(8): G06T7/60G06T7/00
CPCG06T7/0012G06T7/60G06T2207/30004
Inventor 赵璐璐司岳鹏
Owner NEUSOFT MEDICAL SYST CO LTD