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Automatic evaluation method of image quantitation of medical magnetic resonance model body

An evaluation method and image quantification technology, applied in application, medical science, diagnostic recording/measurement, etc., can solve problems such as error, time-consuming, measurement repeatability and poor accuracy

Inactive Publication Date: 2017-05-10
NAT INST OF METROLOGY CHINA
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Problems solved by technology

Due to the differences in the vision of different inspectors, the measurement results obtained by this method often have certain errors, and the measurement repeatability and accuracy are relatively poor.
In addition, the existing methods are time-consuming and the detection efficiency is not high

Method used

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  • Automatic evaluation method of image quantitation of medical magnetic resonance model body
  • Automatic evaluation method of image quantitation of medical magnetic resonance model body
  • Automatic evaluation method of image quantitation of medical magnetic resonance model body

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Embodiment Construction

[0157] In order to further explain the technical means and effects of the present invention to achieve the intended purpose of the invention, in conjunction with the accompanying drawings and preferred embodiments, a quantitative automatic evaluation method for a medical magnetic resonance phantom image proposed according to the present invention includes the following Steps: the first importing image; the second screening image; the third image tilt correction; the fourth, the screened and image tilt-corrected image of the uniformity layer of the phantom to be detected, the image of the high-contrast resolution layer of the phantom to be detected, and the image of the phantom to be detected Detect the image of the low-contrast resolution layer of the phantom and the image of the space linear layer of the phantom to be detected. The detection of the uniformity layer image of the phantom includes image uniformity detection, thick layer detection, signal-to-noise ratio detection, ...

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Abstract

The invention relates to an automatic evaluation method of image quantitation of a medical magnetic resonance model body. The automatic evaluation method comprises the following steps: by adopting image skewing correction, performing two-dimensional rotation to images, and interpolating images by adopting a bicubic interpolation method to ensure that the images are in normotopia; calculating FWHM of each layer thickness area by using a method of calculating the average of a plurliayt of profile lines, so as not to be influenced by subjective factors; increasing image uniformity profile curves, so as to enable the distribution uniformity of images to be clear; extracting the profile of step edges of an ROI area in high-contrast resolution detection by using a watershed method, accurately positioning the position areas of a plurality of line pair sets, so as to accurately draw profile lines; accurately positioning the maximum circular spot in each set of low-contrast resolution detection area by using an image segmentation algorithm of a horizontal set, and automatically and accurately positioning the centroid of all the ROI areas of geometric distortion detection layer by using a centroid method, to guarantee the geometric distortion rate and aspect ratio accuracy. The automatic evaluation method does not rely on individual experiences, the detection speed is fast, and the detection efficiency and the detection accuracy can be greatly promoted.

Description

technical field [0001] The invention relates to a medical magnetic resonance phantom image evaluation method in the field of radiological medical measurement and detection, in particular to an automatic evaluation method for medical magnetic resonance phantom image quantification. Background technique [0002] Because of the characteristics of no ionizing radiation, no harm to the human body, and strong soft tissue resolution ability, nuclear magnetic resonance equipment is widely used in imaging examinations in different departments of hospitals and has become one of the important diagnostic methods for doctors. Ensuring the good performance of medical magnetic resonance equipment, so as to ensure the quality of medical magnetic resonance images, has become the focus of metrology and inspection work. [0003] In order to measure the performance of magnetic resonance imaging equipment, the Magphan SMR 100 / 170 phantom produced by the American phantom laboratory is generally u...

Claims

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Application Information

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IPC IPC(8): A61B5/055
CPCA61B5/055A61B5/0033
Inventor 张璞李成伟刘文丽
Owner NAT INST OF METROLOGY CHINA
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