1.Transplantation of free latissmus dorsi osteocutaneous flap using bridge-like vascular anastomosis in treatment of tibial defect:5-case report
Gonglin ZHANG ; Ming ZHANG ; Ao GUO ; Defu YANG ; Lingzhi ZHANG ; Falin WU ; Liping XIA ; Faming DING
Chinese Journal of General Practitioners 2008;7(9):639-640
From September 2002 to May 2006, five patients ( age range, 24 to 46; mean, 32) with tibial defect underwent transplantation of free latissmus dorsi osteocutaneous flap using bridge-like vascular anastomosis. All the osteocutaneous flaps survived without any serious complications, and tibial defects were improved completely. After 1.5 to 4.5 years' follow-up ( mean, 2.6), no remarkable dysfunction was found at donor sites, and local injury was reduced. This study indicates that transplantation of free latissmus dorsi osteocutaneous flap using bridge-like vascular anastomosis might be useful in leg reconstructive surgery if only one vessel is remained.
2.Adaptive approximation of outer surface of blood vessels in magnetic resonance angiography.
Defu DING ; Bin XIA ; Lisheng WANG
Journal of Biomedical Engineering 2012;29(6):1168-1183
In many cases, extraction and visualization of blood vessels in 3D magnetic resonance angiography (MRA) images are important in clinical diagnosis and surgery planning. Thus, this paper proposes a novel method to reconstruct high-accuracy outer surface of blood vessels from the 3D MRA. With the method, we first detect such local regions that contain blood structures from 3D image by using a boundary tracking technique. Second, in different local regions, different optimal isosurface patches are computed to adaptively represent outer surface of the contained blood vessels. Finally, all computed isosurface patches form a high-accuracy surface model for outer surface of the whole blood vessel structure are obtained. Error analysis and experimental results illustrate the effectiveness of the proposed method.
Algorithms
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Blood Vessels
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anatomy & histology
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Brain
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anatomy & histology
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blood supply
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Cerebrovascular Circulation
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Humans
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Image Enhancement
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Image Processing, Computer-Assisted
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Imaging, Three-Dimensional
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methods
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Magnetic Resonance Angiography
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methods
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Models, Theoretical