Kikuchi K, Kowada M, Ogayama H, Sasanuma J, Watanabe K
Department of Neurosurgery, Akita University School of Medicine, Japan.
Eur J Radiol. 1990 Jan-Feb;10(1):74-83. doi: 10.1016/0720-048x(90)90092-p.
In an effort to achieve efficient image management in clinical neurosurgery utilizing a local image filing system (EFPACS, Fuji Electric Co., Ltd), adequate image-processing and display techniques were developed. One is a method whereby the anatomical location of the thalamic and basal ganglion lesions is determined by automatically superimposing these lesions defined by magnetic resonance imaging (MRI) directly onto the Schaltenbrand-Wahren's human brain atlas. Horizontal, coronal and sagittal MR images are initially obtained based on the intercommissural line and a perpendicular erected on the midcommissural point as the basic reference coordinates. Precise superimposition is accomplished by the use of these reference axes. This imaging technique may offer the potential for help in anatomical identification of small intracranial lesions. Another technique described in the current communication is automated synthesis of two cerebral angiograms. By simply indicating two reference points, nasion and inion, with a cursor on the display screen, two films are automatically superimposed and displayed as a single synthesized image, featuring two different vascular phases simultaneously by a positive(vein)-negative(artery) mode. This technique was applied to patients with complete occlusion of the middle cerebral artery with or without sufficient blood flow through collateral circulation and was found useful in evaluating basic hemodynamics on a single angiographic image.
为了利用本地图像存档系统（EFPACS，富士电机株式会社）在临床神经外科实现高效的图像管理，开发了适当的图像处理和显示技术。一种方法是通过将磁共振成像（MRI）定义的丘脑和基底神经节病变直接自动叠加到Schaltenbrand-Wahren人脑图谱上，来确定这些病变的解剖位置。水平、冠状和矢状位MR图像最初是基于连合间线和在连合中点上竖立的垂线作为基本参考坐标而获得的。通过使用这些参考轴来实现精确叠加。这种成像技术可能有助于对颅内小病变进行解剖学识别。本通讯中描述的另一种技术是自动合成两张脑血管造影照片。只需在显示屏上用光标指示两个参考点，即鼻根点和枕外隆凸点，两张胶片就会自动叠加并显示为一张合成图像，通过正（静脉）-负（动脉）模式同时呈现两个不同的血管期。该技术应用于大脑中动脉完全闭塞且有或没有通过侧支循环的足够血流的患者，发现其有助于在单张血管造影图像上评估基本血流动力学。
