کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1761442 | 1019648 | 2006 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Segmentation of elastographic images using a coarse-to-fine active contour model
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کلمات کلیدی
Elastography - الستوگرافیImage segmentation - بخش بندی تصویر یا قطعه بندی تصویرAblation - تخریبElasticity imaging - تصویربرداری الاستیکBreast tumor - تومور پستانGradient vector flow - جریان بردار گرادیان3-D ultrasound - سونوگرافی 3 بعدیSnakes - مارهاActive contour models - مدل های کنترلی فعالStrain - نژادMultiresolution - چند راه حل
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
آکوستیک و فرا صوت
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Delineation of radiofrequency-ablation-induced coagulation (thermal lesion) boundaries is an important clinical problem that is not well addressed by conventional imaging modalities. Elastography, which produces images of the local strain after small, externally applied compressions, can be used for visualization of thermal coagulations. This paper presents an automated segmentation approach for thermal coagulations on 3-D elastographic data to obtain both area and volume information rapidly. The approach consists of a coarse-to-fine method for active contour initialization and a gradient vector flow, active contour model for deformable contour optimization with the help of prior knowledge of the geometry of general thermal coagulations. The performance of the algorithm has been shown to be comparable to manual delineation of coagulations on elastograms by medical physicists (r = 0.99 for volumes of 36 radiofrequency-induced coagulations). Furthermore, the automatic algorithm applied to elastograms yielded results that agreed with manual delineation of coagulations on pathology images (r = 0.96 for the same 36 lesions). This algorithm has also been successfully applied on in vivo elastograms. (E-mail: wuliu@wisc.edu)
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ultrasound in Medicine & Biology - Volume 32, Issue 3, March 2006, Pages 397-408
Journal: Ultrasound in Medicine & Biology - Volume 32, Issue 3, March 2006, Pages 397-408
نویسندگان
Wu Liu, James A. Zagzebski, Tomy Varghese, Charles R. Dyer, Udomchai Techavipoo, Timothy J. Hall,