计算机工程与应用
計算機工程與應用
계산궤공정여응용
COMPUTER ENGINEERING AND APPLICATIONS
2009年
31期
215-217
,共3页
阈值处理%形态学重构%CT血管造影(CTA)%肋骨和脊椎骨分割
閾值處理%形態學重構%CT血管造影(CTA)%肋骨和脊椎骨分割
역치처리%형태학중구%CT혈관조영(CTA)%륵골화척추골분할
thresholding%morphological reconstruction%Computed Tomography Angiography(CTA)%spines and ribs segmentation
肋骨和脊椎骨的分割是从肝脏CTA(即肝脏CT血管造影)图像中准确分割出肝脏的重要预处理工作,一般考虑阈值分割方法,但该方法常常导致分割不全或过分割.提出了一种将形态学方法和阈值法结合起来的肋骨和脊椎骨分割方法.利用局部解剖学知识,构建四种图像边界特征线,然后通过二值形态学处理方法实现肋骨和脊椎骨的分割.这样既适应了由于不同图像的肋骨和脊椎骨灰度值不同的复杂性,也消除了由于其他器官灰度值相近的影响.实验结果表明,该方法能够高效准确地分割出肝脏CTA图像中的肋骨和脊椎骨.
肋骨和脊椎骨的分割是從肝髒CTA(即肝髒CT血管造影)圖像中準確分割齣肝髒的重要預處理工作,一般攷慮閾值分割方法,但該方法常常導緻分割不全或過分割.提齣瞭一種將形態學方法和閾值法結閤起來的肋骨和脊椎骨分割方法.利用跼部解剖學知識,構建四種圖像邊界特徵線,然後通過二值形態學處理方法實現肋骨和脊椎骨的分割.這樣既適應瞭由于不同圖像的肋骨和脊椎骨灰度值不同的複雜性,也消除瞭由于其他器官灰度值相近的影響.實驗結果錶明,該方法能夠高效準確地分割齣肝髒CTA圖像中的肋骨和脊椎骨.
륵골화척추골적분할시종간장CTA(즉간장CT혈관조영)도상중준학분할출간장적중요예처리공작,일반고필역치분할방법,단해방법상상도치분할불전혹과분할.제출료일충장형태학방법화역치법결합기래적륵골화척추골분할방법.이용국부해부학지식,구건사충도상변계특정선,연후통과이치형태학처리방법실현륵골화척추골적분할.저양기괄응료유우불동도상적륵골화척추골회도치불동적복잡성,야소제료유우기타기관회도치상근적영향.실험결과표명,해방법능구고효준학지분할출간장CTA도상중적륵골화척추골.
The segmentation of the spines and ribs is an important preprocessing work in the segmentation of liver from liver CTA images.Usually thresholding is chosen,but this method will result in integrant or over-segmentation.To solve this problem,the paper proposes a method combining regional anatomy with threshold to remove the spine and ribs.Based on the basic theory of regional anatomy,the method first builds four border characteristics lines,and then removes the spine and ribs through binary morphological reconstruction.The proposed method not only adapts to different images of the spine and ribs with different gray values,but also eliminates the impact of adjacent tissues with the similar gray scale.The experimental results show that the proposed method can segment the spines and ribs from liver CTA images efficiently and accurately.
