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J2459型学生示波器的改进
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作者 晋家林 《中小学实验与装备》 2008年第4期30-31,共2页
人教版全日制普通高级中学教科书《物理》(试验修订本)第二册中有《练习使用示波器》这一学生实验,是高考考纲中要求的学生必做实验之一,其中有一步操作——观察扫描并进行调节,这一步是这样操作的:把X增益旋钮顺时针转到三分之... 人教版全日制普通高级中学教科书《物理》(试验修订本)第二册中有《练习使用示波器》这一学生实验,是高考考纲中要求的学生必做实验之一,其中有一步操作——观察扫描并进行调节,这一步是这样操作的:把X增益旋钮顺时针转到三分之一处,扫描微调旋钮反时针转到底,扫描范围旋钮置于最低挡,可以看到扫描情况: 展开更多
关键词 学生示波器 《练习使用示波器》 学生实验 试验修订本 中学教科书 《物理》 扫描情况
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What is a reliable CT scan for diagnosing splenosis under emergency conditions?
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作者 Francesco Giuseppe Garaci Michele Grande +5 位作者 Massimo Villa Stefano Mancino Daniel Konda Giovanni Simonetti Grazia Maria Attinà Gabriele Galatà 《World Journal of Gastroenterology》 SCIE CAS CSCD 2009年第29期3684-3686,共3页
Splenosis is a condition in which splenic tissue is present in a non-anatomical position. Implants of splenic tissue can mimic neoplasms and only specific examinations can confirm the correct diagnosis. Here we report... Splenosis is a condition in which splenic tissue is present in a non-anatomical position. Implants of splenic tissue can mimic neoplasms and only specific examinations can confirm the correct diagnosis. Here we report a case of a 23-year-old male patient with a history of surgical splenectomy during childhood after trauma. He was admitted to the emergency department with acute bowel obstruction. An abdominalpelvic computed tomography (CT) scan revealed small bowel obstruction and the presence of two rounded, solid masses located in the rectal-vescical pouch. Quantitative analyses of the different density values in the arterial phase and early portal venous phase demonstrated that these lesions were highly vascularised (92 and 97 Hounsfield Units, respectively). The hypothesis of an ectopic splenic mass was made after evaluation of the CT images and clinical history. The acute bowel obstruction caused by adhesive intestinal syndrome was resolved by surgical adhesiolysis. The smallest mass adherent to the rectum was removed. Histopathologic examination confirmed the benign nature of the lesion, which consisted of splenic tissue. 展开更多
关键词 SPLENOSIS Ectopic splenic tissue Computedtomography scan SPLENECTOMY Emergency
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