边缘密度

At last,to compare differences of occurrence concerning all the imaging signs(cystic bone destructions, lucent area,"ground glass"-like density,calcification,sclerotic border,internal septation and shape abnormality of bone involved)between investigative group and control group by using Fisher Exact Test,The relative marked CT features of fibrous dysplasia at rare sites were summarized eventually.

利用Fisher确切概率法，对比囊状骨质破坏、低密度透亮区、磨玻璃样改变、骨化、边缘硬化、内部分隔、受累骨形态改变等征象在研究组、对照组出现的差异，总结研究组相对特征性CT表现。

Zigzag margin and artifacts of bands of low density (partial volume and stairstep artifact) were found on the vessel model nearly horizontal to the data collection plane.

在几乎平行於原始资料收集平面之动脉可见不规则之边缘及带状之低密度（部份体积效应及梯形假影）。

Fourth,from both labor force evolvement or units evolvement point of view, Shanghai is changing from monocentricity with the People's Square center, to two-center city with the People's Square and Xujiahui, and the subcenter of Xujiahuii is coming into being.

第三，从法人单位密度变化趋势看，不是表现为由中心城区向郊区扩散，而是表现出由城市中心8公里以内范围向中心城区边缘区扩散的变动特征。

Mallory trichrism staining exhibited light blue samples. Eight weeks following repair, CT showed round blunt defect edges in the coronal position, which had bony pustute connection with gel materials. Density at the defect region significantly increased. 3D reconstruction suggested that defects became small. After hematoxylin-eosin staining, abundant fibrous connective tissue appeared in defect regions, with bony tissues. Mallory trichrism staining revealed that maroon mature bone tissues were found, surrounded by light blue chondroid tissues.

修复后8周，冠状位CT显示缺损边缘圆钝，与凝胶材料有骨性突起连接，缺损处密度增高明显，三维重建显示缺损范围较之前有所减小；标本苏木精-伊红染色后缺损部可见大量含血管成分的纤维结缔组织，有骨样组织结构形成，Mallory三色染色显示有褐红色成熟骨组织形成，其旁边有淡蓝色软骨样组织。

Mallory trichrism staining exhibited light blue samples. Eight weeks following repair, CT showed round blunt defect edges in the coronal position, which had bony pustute connection with gel materials. Density at the defect region significantly increased. 3D reconstruction suggested that defects became small. After hematoxylin-eosin staining, abundant fibrous connective tissue appeared in defect regions, with bony tissues. Mallory trichrism staining revealed that maroon mature bone tissues were found, surrounded by light blue chondroid tissues. Twelve weeks following repair, coronal defect regions were filled with callus. 3D reconstruction showed that defects were repaired. Defect region and surrounding bony tissues had bony connection, with thick bone trabecula and mature Haversian system.

修复后8周，冠状位CT显示缺损边缘圆钝，与凝胶材料有骨性突起连接，缺损处密度增高明显，三维重建显示缺损范围较之前有所减小；标本苏木精－伊红染色后缺损部可见大量含血管成分的纤维结缔组织，有骨样组织结构形成，Mallory三色染色显示有褐红色成熟骨组织形成，其旁边有淡蓝色软骨样组织修复后12周，冠状位CT显示缺损区基本被骨痂填满，三维重建示缺损基本修复；缺损区域和周围骨组织形成骨性结合，骨小梁粗大，哈弗氏系统成熟。

Incomplete thin rim - like enhancement of the tumor periphery was seen on CT enhanced scan in 10 cases of 14 cystiform ,complete enhancement in 3 cases .

增强扫描14例囊性病变中有10例出现病灶边缘不连续的较薄环形增强，3例连续环行强化，门静脉期13例均无变化；1例无增强表现。7例实质性病变在增强1min后病灶轻度强化，3—8min后病灶出现延迟增强，密度等于或大于同层肝组织，扩张的胆管无变化。

CT characteristics: malignant GISTs mainly qualified as large size, inequable density, necrosis and cystoid changes in the center, unsmoothing and lobulated border lines, inequable reinforcement after enhanced CT scanning.

CT特征：恶性度较高的胃肠间质瘤CT表现为：肿块相对较大，密度不均，肿瘤中央坏死及囊变多见；肿瘤边缘多不光整，可呈分叶状。

According to the extraction of cells figures, based on the edge detection the paper extracts 9 measurement parameters such as centroid, area, area rate of karyon and cytoplasm, optic density, cells and karyon shape factor according to the morphological knowledge and the medical knowledge of pathology expert.

在细胞特征提取方面，在边缘检测的基础上依据形态学知识和病理学专家的医学知识提取了诸如周长、面积、核质比、光密度、细胞及细胞核形状因子等9个度量参数。

Results 20 cases of CT examination had made proper diagnoses,the CT imaging finding about the most of peripheral cholangiocarcinoma included:There was the atactic low density tumour in liver,its borderline was unclear,enhanced scan appearances were irregular peripheral enhancement,centripetal enhancement,and delaying enhancement;There was concretion and dilatation of bile buct in or around the focus;The local envelope of liver was lacunose and the local liver was atrophied,There was abroad putrescence and liquescence in the focus.

结果 20例CT做出了正确的诊断，部分周围型胆管细胞癌的CT表现肝内不规则低密度肿块边界欠清，增强扫描表现病灶边缘呈不规则环状强化，有向心性强化的趋势，出现延迟强化；病灶内或周围可见结石，病灶内及周围肝内胆管扩张；局部肝包膜回缩、肝叶萎缩，病灶内大片坏死、液化。

Made of 43 mm thick panel composed of 18mm ply wood core and two layers of 12mm MDF covered with beech veneer, all edges to have 5mm solid beech lipping.

取得了43毫米厚的组成的小组十八毫米铺设木核心和两层12毫米中密度纤维板与榉木贴面覆盖，所有的边缘有5毫米固体山毛榉lipping 。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。