Specific absorbed fractions from the image-based VIP-Man body model and EGS4-VLSI Monte Carlo code: internal electron emitters

VIP-Man is a whole-body anatomical model newly developed at Rensselaer from the high-resolution colour images of the National Library of Medicine's Visible Human Project. This paper summarizes the use of VIP-Man and the Monte Carlo method to calculate specific absorbed fractions from internal electron emitters. A specially designed EGS4 user code, named EGS4-VLSI, was developed to use the extremely large number of image data contained in the VIP-Man. Monoenergetic and isotropic electron emitters with energies from 100 keV to 4 MeV are considered to be uniformly distributed in 26 organs. This paper presents, for the first time, results of internal electron exposures based on a realistic whole-body tomographic model. Because VIP-Man has many organs and tissues that were previously not well defined (or not available) in other models, the efforts at Rensselaer and elsewhere bring an unprecedented opportunity to significantly improve the internal dosimetry.     

异位妊娠危险因素分析

目的 分析、研究异位妊娠相关因素,早期发现及时诊治。方法 收集异位妊娠64例,与同期正常妊娠62例对照,两组就相关危险因素进行对比分析。结果 感染、手术、尤其是输卵管手术、不孕症、多次流产、IUD等同异位妊娠密切相关,与正常妊娠组在统计学上差异显著(P<0.001)。结论 近年来,异位妊娠发生率呈明显上升趋势,大出血仍是早孕妇女死亡的重要原因。各种危险因素的增加同其发病率的不断上升密切相关。应重视异位妊娠的相关因素。早期发现、早期诊断、早期治疗。     

应用威布尔分布函数研究红霉素微囊的溶出度

本文测定了红霉素微囊在人工肠液中的溶出度，并用威布尔分布函数求出了溶出百分率与时间的关系。     

红霉素缓释微囊的制备及其释药机理的研究

本文旨在探讨红霉素微囊的制备及体外缓释机理。以明胶等为囊材,用红霉素制成微囊,研究微囊的厚度及孔隙度对药物释放速率的影响。进行理论分析,与实验结果相符性较好。     

Acupoint-specific fMRI patterns in human brain

Specific central nervous system (CNS) responses to acupuncture have recently attracted attention. It is important to understand the differences in fMRI images of the brain evoked by acupuncture at an acupoint and at a nearby "sham" point. Here, we report analyses of fMRI images of the brains of 37 healthy volunteers in response to acupuncture at Liv3 (Taichong) and LI4 (Hegu) versus their sham points. We found common activation areas in response to Liv3 or LI4 acupuncture in the middle temporal gyrus and cerebellum, along with deactivation areas in the middle frontal gyrus and inferior parietal lobule, compared with the effects of acupuncture at sham points. Acupuncture at Liv3 evoked specific activation at the postcentral gyrus, posterior cingulate, parahippocampal gyrus, BA 7, 19 and 41, but deactivation at the inferior frontal gyrus, anterior cingulate, BA 17 and 18, compared with acupuncture at its sham point. Acupuncture at LI4 evoked specific activation at the temporal pole, but deactivation at the precentral gyrus, superior temporal gyrus, pulvinar and BA 8, 9 and 45, compared with acupuncture at its sham point. These observations reveal that acupuncture at acupoints induces specific patterns of brain activity, and these patterns may relate to the therapeutic effects of acupuncture.     

Morphine modulates glutamate release in the hippocampal CA1 area in mice

Opiate abuse is associated with long-lasting neural adaptative changes in the brain. Increasing evidence demonstrates that opiates significantly alter the function of the glutamatergic system, while how the system is regulated still remains elusive. In the present study, we studied the effect of morphine on extracellular glutamate concentration in the hippocampus, a nucleus rich of the glutamatergic neurons. The results showed that glutamate concentration in the extracellular fluid of the hippocampus was decreased following either acute or chronic treatment of morphine. However, naloxone-induced withdrawal increased glutamate concentration significantly. These results suggest an adaptation of the glutamatergic neuronal transmission in the hippocampus after morphine treatment.     

骨髓浆细胞酸性磷酸酶积分用于多发性骨髓瘤病情的监测

对３６例多发性骨髓瘤（ＭＭ）患者骨髓涂片，行酸性磷酸酶（ＡＣＰ）染色。结果发现ＭＭ组的骨髓浆细胞ＡＣＰ积分明显高于对照组。ＭＭ组初诊时、缓解期和复发期４６人次检测结果表明，成ＭＭ病程中ＡＣＰ积分病情变化而变化，缓解期的较初诊时降低，复发期的又复增高。这种变化有时较骨髓浆细胞比例的变化与病情的关系更为密切，提示ＡＣＰ积分可作为ＭＭ病情监测的指标。     

高山红景天多糖对小鼠抗柯萨奇B5病毒感染能力的研究

对感染柯萨奇Ｂ５病毒（ＣＶＢ）小鼠模型研究结果表明，高山红景天多糖对发病小鼠心肌功能改善和免疫功能提高均具有明显的促进作用。增强了小鼠抗ＣＶＢ５感染的能力，并对由ＣＢＶ感染性疾病也有一定的防治作用。     

基于虚拟气体传感器阵列的新型肺癌检测电子鼻实验研究

本研究介绍了一种新型的基于虚拟气体传感器阵列及图象识别方法的新型无创肺癌检测与诊断电子鼻。该电子鼻包含一个由固相微萃取和毛细管柱组成的前处理装置实现病人呼吸气体中有机气体成分的浓缩吸附、脱附和分离,通过一个表面涂覆聚异丁稀薄膜差动结构的声表面波传感器对分离后的有机气体成分进行定量检测。此外,采用由毛细管柱方法实现的虚拟气体传感器阵列及改进的人工神经网络算法实现对肺癌呼吸气味图像的有效识别。通过临床实验验证,表明该电子鼻仪器可以有效地识别出肺癌患者、肺癌疑似病人和健康人,因此将有望在包括肺癌等疾病的早期诊断仪器中发挥重要的作用。     

妊娠合并多诱因顽固性代谢性酸中毒1例报道

<正>1病例介绍1.1基本情况患者,女,39岁,因“发热、畏寒2 d,气促、心悸、下腹胀痛3 h”入院,G5P3 28+3周孕,既往有糖尿病病史2年,予口服二甲双胍,孕前4个月予皮下注射胰岛素（早、晚餐前20 U）。有剖宫产手术史,21年前顺产一活男婴（体健）;12年前剖宫产一活女婴（体健）;自然流产1次,难免流产1次。末次月经2021年5月28日,本次外院彩超示“宫内早孕”。