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Three-dimensional displayof morphological and functional medical images

形态和功能医学图像的三维显示

基本信息

批准号：
04650389
负责人：
UYAMA Chikao
金额：
$ 0.9万
依托单位：
NATIIONAL CARDIOVASCULAR CENTER RESEARCH INSTITUTE
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1992
资助国家：
日本
起止时间：
1992 至 1993
项目状态：
已结题

项目摘要

We aimed to construct three-dimensional blood vessel trunk and branch structure using ultra-fast X-ray computed tompgram for morphological aspect. Iliac-arterial angiographhic X-ray CT images were traced along vessel circumference whose coordinates were fed into a computer. There is one vessel, the aorta, on the uppermost X-ray CT image and usually four arteries, internal and external iliac arteries on the left and right sides on the lowest X-ray CT images. An algorithm was established to connect vessel sections on adjuscent X-ray images. Vessel trunk and branches were three-dimensionally demonstrated by wire-frame model on a graphic display monitor.The second subject shows meandering vessel on the left iliac artery. To display this shape by wire-frame model, longitudinal contour lines along meandering vessel should be also established. A line connectivity relationship of the adjuscent X-ray CT images on which a section of the meandering artery is displayd was also determined.Another d … More isplay object is the aortic arch from which arterial branches leave to the arms and brain. A connectivity relationshp of arterial sections was also established in this part of X-ray CT images.A functional image was constructed by using single photon emision computed tomography (SPECT) images. A subject is of an idiopathic pulmonary hypertension. The SPECT images of this disease shows irregularly distributed radioisotope (RI) accumulation mass. Consecutive 33 SPECT images were taken from a subject. While consecutive images were regarded as a bricklaying structure. Each brick, "voxel" in the image processing terminology, has a value which corresponds to RI quantity accumulted on this small volume. A sub-area where RI is locally accumulated was then separated from adjuscent sub-area by a proposed algorithm. The whole area was separatedinto 7 sub-areas for a subject with an idiopathic pulmonary hypertension comparing with 2 sub-areas, left and right lungs, for a control subject. We will furthermore proceed if the proposed algorithm works correctly. Less

我们的目的是建立三维血管干和分支结构，使用超快速X线计算机断层扫描的形态学方面。髂动脉造影X线CT图像沿血管圆周沿着追踪，将血管圆周坐标输入计算机。在最上面的X射线CT图像上有一个血管，即主动脉，并且在最下面的X射线CT图像上通常有四个动脉，即在左侧和右侧的髂内动脉和髂外动脉。提出了一种在X线平片上连接血管断面的算法。血管主干和分支在图形显示器上通过线框模型进行三维显示。第二例受试者显示左髂动脉上的蜿蜒血管。为了用线框模型显示这种形状，还应建立沿沿着血管的纵向等值线。确定了显示弯曲动脉断面的相邻X线CT图像之间的线连通关系， ...更多信息显示对象是主动脉弓，动脉分支从主动脉弓离开到手臂和大脑。在此基础上建立了动脉断面的连通性关系，并利用单光子发射计算机断层扫描（SPECT）图像构建了功能图像。受试者患有特发性肺动脉高压。SPECT图像显示不规则分布的放射性同位素（RI）聚集肿块。对一名受试者进行了连续33次SPECT图像。而连续的图像被视为一个砌砖结构。每个块，图像处理术语中的“体素”，具有对应于在该小体积上累积的RI量的值。该算法将RI局部累积的子区域从相邻子区域中分离出来。特发性肺动脉高压患者的整个区域分为7个亚区，对照组分为左肺和右肺2个亚区。如果所提出的算法正确工作，我们将进一步进行。少