Vessel enhancement filtering in three-dimensional MR angiograms using long-range signal correlation

Small vessels in three-dimensional MR angiograms have low visibility in maximum-intensity projection images because of their low contrast. In a previous study, we had two nonlinear filters that appeared to give significant improvement in small vessel detail. In this paper, we report on a generalization of this filter that allows a more general modeling of the vessels and a more complete suppression of background. One implementation of the general filter gave a vessel mean contrast-to-noise ratio that is 2.52 and 3.51 times higher than the vessel mean contrast-to-noise ratio obtained using our previously reported maximum-minimum (max-min) filter and cross- section filter, respectively.     

米非司酮配伍米索前列醇终止早孕用药方法的探讨

作者对１２０例妊娠４９ｄ以内的孕妇采用４种不同的服药方法进行药物流产，其中使用第３、４种用药方法的孕妇均于加用米索前列醇后８ｈ内排出孕囊，且２ｈ内排出率明显增加，与常规用药方法比较有显著性差异（Ｐ＜０．０１），同时对用药机理作了讨论。     

胃粘膜肠上皮化生与胃癌关系的粘液组织化学和免疫组织化学研究

应用ＡＢ（ｐＨ１．０）ＫＯＨ／ＰＡＳ粘液组织化学和ＡＢＣ法凝集素标记免疫组织化学方法对１９０例胃粘膜标本进行观察。结果表明，结肠不完全型肠上皮化生多见于肠型癌及其癌旁组织。在形态学和功能上，显示出一定程度的分化不成熟。两型肠化在弥漫型癌中无显著差异。５种凝集素受体含量和分布的差异与胃癌的组织学类型和分化程度有关，凝集素肠化分型和组织学类型的关系与粘液组化染色基本相符。我们认为不完全型肠化与肠型胃癌的发生关系密切，而完全型肠化可能与弥漫型胃癌有关。应用ＡＢ／ＫＯＨ／ＰＡＳ染色进行肠化分型和凝集素标记，对于癌前病变的检测和癌的早期诊断都具有一定价值。     

不同气功的心血管效应

用XG-2型血液循环功能测试仪,对健康中老年人,一次锻炼放松功(24人)和禅密功(28人)前后进行测试,结果表明不同气功的短时效应差别甚大,为辨证施功提供了实验根据。     

溶血磷脂胆硷对缺血性心室肌电生理的影响

用台氏液加溶血磷脂胆硷（ＬＰＣ）３ｘｌ０－４灌流离体绵羊心室小梁肌，其０期去极化最大速率（Ｖｍａｘ）、静息电位（ＲＰ）、动作电位幅值（ＡＰＡ）、动作电位复极达ＡＰＡ５０％和９０％的时程ＡＰＤ５０、ＡＰＤ９０分别下降３９．８％、１０．４％、１４．５％、２１．３％和１４．８％；用“模拟缺血溶液”加ＬＰＣ３×ＩＯ－４灌流，其Ｖｍａｘ、ＲＰ、ＡＰＡ、ＡＰＤｓ０和ＡＰＤ９０分别下降７８％、２２．７％、２６％、３５．４％和２１％；实验中对“模拟缺血溶液”中各种成分对ＬＰＣ效应的影响进行分析，发现主要的因素是酸中毒。结果表明：ＬＰＣ是心肌缺血中心律失常的重要因素之一，缺血诱导的酸中毒更加重了ＬＰＣ对心肌细胞的毒性作用。     

一种含胆甾醇介晶基团的侧链液晶高分子的合成

以２，４－二异氰酸甲苯酯（２，４—ＴＤＩ）、胆甾醇、丙烯酸β－羟丙酯为原料，合成了含胆甾醇介品基团的侧链液晶高分子、并用ＮＭＲ、ＩＲ和元素分析方法对其结构进行了鉴定。聚合物的相转变温度和形态织构用ＤＳＣ、Ｘ－射线衍射和偏光显微镜进行了测定和观察。     

良、恶性肿瘤患者血清铜蓝蛋白放射免疫测定及其临床意义探讨

本文用放射免疫分析法测定了１６８例良、恶性肿瘤患者的空腹血清铜蓝蛋白含量，结果显示良性肿瘤患者高于正常对照组（Ｐ＜０．０５），恶性肿瘤患者显著高于正常对照组和良性肿瘤患者（Ｐ＜０．０１）．提示用放射免疫分析法测定血清铜蓝蛋白可作为恶性肿瘤的一项重要辅助诊断指标，有助于良、恶性肿瘤的诊断与鉴别诊断。     

补中益气汤治疗慢性乙型肝炎的临床与实验研究

通过对补中益气汤及西药治疗慢性乙型肝炎临床疗效的对比研究,发现补中益气汤能较快改善慢性乙型肝炎的临床症状及体征,改善肝功能,促使乙型肝炎病毒血清学标志好转(HBsAg、HBeAg转阴或滴度下降,抗-HBe或抗-HBs转为阳性),与西药治疗对照组比较有显著性差异(P<0.05)。动物实验观察了补中益气汤对小鼠肝组织DNA、RNA、蛋白质合成的影响,结果表明,补中益气汤对三者的合成均有明显的促进作用。其抗肝炎的作用机制可能与该方增强肝脏蛋白质的合成,促进肝组织的修复,改善机体整体的抗病机能有关。     

Primate endocrine function after pancreatico-duodenal-splenic allotransplantation

In this study the endocrine function following intraperitoneal hetero- and orthotopic pancreatico-duodenal-splenic allotransplantation (PDS) in hemipancreatectomized, non-immune-suppressed chacma baboons was assessed. Significantly reduced K-values and insulin release together with glucose intolerance during IVGTT were observed in hemipancreatectomized recipients (HPS) without grafts. Orthotopic and heterotopic PDS transplantation improved the glucose intolerance of HPS recipients; orthotopically sited grafts rendering the best curves. Normal glucose tolerance was not achieved. Both orthotopic and heterotopic PDS transplantation rendered suboptimal insulin release during IVGTT; heterotopically draining grafts released significantly more insulin than orthotopic grafts. Hyperglucagonaemia during IVGTT was a constant feature in both groups, heterotopic grafts releasing the most glucagon during stimulation. C-peptide release was significantly lower in orthotopic grafts compared to normal animals or heterotopically drained insulin. It is concluded that glucose tolerance was not directly related to insulin or glucagon release in this study as orthotopic grafts rendered near-normal IVGTT curves in the presence of hypoinsulinaemia, hyperglucagonaemia, and reduced C-peptide values. The hormonal response after PDS transplantation was variable and the advantages of portal vs systemic insulin drainage remain to be defined.     

R波相关振动法血压测量

为了提高振地血压测量的准确性，提出了一咱基于心电Ｒ波与血压振动波之间相关性，识别振动信号的一种抗干扰方法＝－Ｒ波相关法，结合振动波形特征识别，该方法可有效地提取信号，消除干扰影响，该算法已在１６位８０９８单片机上实现，本文同时给出了程序的详细流程图。