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Title:
METHOD FOR DETECTING AND LOCATING METAL NEEDLE IN X-RAY CT IMAGE
Document Type and Number:
WIPO Patent Application WO/2020/244098
Kind Code:
A1
Abstract:
The invention specifically relates to the technical fields of medical CT imaging and image processing and discloses a method for detecting and locating a metal needle in an X-ray CT image. In the detecting and locating method, firstly, an image artifact caused by a metal needle is corrected to acquire a high-quality CT image, and then the morphological information of the metal needle is detected. The detecting and locating method mainly comprises: firstly, reconstructing multi-energy projection data of a detection region acquired by a CT device and comprising a detected metal needle, acquiring, by means of segmentation, a prior image comprising only soft tissue and bones, and the metal needle, performing a layering processing on the multi-energy projection data, interpolating a metal projection region, and performing reconstruction to obtain a corrected image; preprocessing the corrected image to acquire a binary image; using an area classification method to perform a Radon transform and perform line detection; and finally, using a DBSCAN clustering method to locate a needle point of the metal needle. The method quickly and accurately detects and locates a needle-shaped instrument in clinical diagnosis and treatment guided by a CT image.

Inventors:
CHEN MING (CN)
LI GANG (CN)
XIA DIMENG (CN)
HAN JINGQI (CN)
LIU KAIJIA (CN)
ZHENG YONGGUO (CN)
Application Number:
CN2019/106877
Publication Date:
December 10, 2020
Filing Date:
September 20, 2019
Export Citation:
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Assignee:
UNIV SHANDONG SCIENCE & TECH (CN)
International Classes:
G06T7/00; G06T7/13; G06T7/62; G06T7/73
Domestic Patent References:
WO2016158138A12016-10-06
Foreign References:
CN104992409A2015-10-21
CN103190928A2013-07-10
CN103310432A2013-09-18
Other References:
LI, MING ET AL.: "Determination of Location and Shape of Metallic Object in CT Based on Tangent Back-Projection", CHINESE JOURNAL OF LIQUID CRYSTALS AND DISPLAYS, vol. 28, no. 2, 30 April 2013 (2013-04-30), ISSN: 1007-2780, DOI: 20200115124709Y
Attorney, Agent or Firm:
QINGDAO ZHIDILINGCHUANG PATENT AGENCY CO., LTD (CN)
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