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Diagnostic Value of Spiral CT Chest enhanced scan in Adult with Active Pulmonary Tuberculosis

Journal of Clinical and Nursing Research 2020年第3期4卷 1-4页

作者： Ruishu Wang The Affiliated Hospital of Chifeng College Chifeng City 024005Inner MongoliaChina

Aim:To explore the diagnostic value of spiral CT chest enhanced scan for adults with active pulmonary tuberculosis.Methods:The clinical data of 60 adult patients with active pulmonary tuberculosis who were treated in our hospital from January 2018 to November 2019 were retrospectively analyzed.All patients underwent conventional chest radiography and spiral CT chest enhanced scan.The number of tuberculosis diagnosis,the detection rate of special site lesions,and the detection rate of active pulmonary tuberculosis signs by the two methods were compared.Results:In 60 patients,the pathological results confirmed the existence of 75 tuberculosis lesions.The detection rate of spiral CT was 98.67%,which was not statistically significant compared with the detection rate of 92.00%(P>0.05)in the conventional chest X-ray.The detection rate of spiral CT enhanced scans for tuberculosis lesions in special sites was 100.00%,which was significantly higher than that of conventional chest X-ray of 7.69%,and the accuracy rate of active pulmonary tuberculosis signs was 98.85%higher than that of conventional chest X-ray of 79.31%.Penhanced scan can not only find special tuberculosis lesions that cannot be detected by conventional chest radiography,but also accurately determine active pulmonary tuberculosis in adults,which is of high diagnostic value.

关键词： Active pulmonary tuberculosis Adult Spiral CT enhanced scan Signs of active pulmonary tuberculosis

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Low overhead design-for-testability for scan-based delay fault testing

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Journal of Systems Engineering and Electronics 2007年第1期18卷 40-44页

作者： Yang Decai Chen Guangju Xie Yongle Coll. of Automation Engineering Univ. of Electronic Science and Technology Chengdu 610054 P. R. China

An efficient design-for-testability （DFT） technique is proposed to achieve low overhead for scan-based delay fault testing. Existing techniques for delay test such as skewed-load or broadside make the test generation process complex and produce lower coverage for scan-based designs as compared with non-scan designs, whereas techniques such as enhanced-scan test can make the test easy but need an extra holding latch to add substantial hardware overhead. A new tri-state holding logic is presented to replace the common holding latch in enhanced-scan test to get a substantial low hardware overhead. This scheme can achieve low delay overhead by avoiding the holding latch on the critical timing scan path. What＇s more, this method can also keep the state and signal activity in the combinational circuit from the scan during data scan-in operation to reduce the power dissipation. Experiment results on a set of ISCAS89 benchmarks show the efficiency of the proposed scheme.

关键词： Delay fault testing Design for testability enhanced scan

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Spiral CT localization of pancreatic function-ing islet cell tumors

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Hepatobiliary & Pancreatic Diseases International 2004年第4期3卷 616-619页

作者： Qing Xu, Wen-Hua Chen and Qing-Juan Huang Nanjing, China Department of Radiology, First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China Department of Radiology, Third Affiliated Hospital of Suzhou Univer- sity, Changzhou 213003, China Department of Radiology First Affiliated Hospital of Nanjing Medical University Nanjing 210029 China. xuqingst@***

BACKGROUND: Surgeons are always concerned about the localization of pancreatic functioning islet cell tumor. If the tumor is accurately localized before operation, resection of the pancreatic body and tail without intention can be avoided. The purpose of this study was to evaluate spiral CT localization of pancreatic functioning islet cell tumors and CT techniques. METHODS: CT manifestations in 6 patients with clinically and pathologically proved pancreatic functioning islet cell tumors ware analyzed retrospectively. RESULTS: In 4 patients with insulinomas and 2 patients with glucagonomas, 5 were localized accurately by CT be- fore surgery and 1 was detected retrospectively. The en- hancement of tumors was greater than that of normal pan- creas in arterial phase and pancreatic parenchymal phase. Four patients showed mild high-density and 2, iso-density in the portal venous phase. CONCLUSION: Spiral CT multi-phase enhanced scan with 1.5 ml/kg contrast agent and 2-5 mm slice width can loca- lize functioning islet cell tumors accurately.

关键词： islet cell tumor spiral CT enhanced scan

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Spiral multi-phase CT in evaluating resectability of pancreatic carcinoma

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Hepatobiliary & Pancreatic Diseases International 2002年第4期1卷 614-619页

作者： Qing-Juan Huang Qing Xu Xiao-Ning Wang Lian-Liang Zhang the Department of Radiology, First Affiliated Hospital, Nanjing Medical University, Nanjing 210029, China Department of Radiology First Affiliated Hospital Nanjing Medical University Nanjing 210029 China

Objectives: To evaluate the specific manifestations of pancreatic carcinoma on spiral multi-phase CT and its resectability before operation. Methods: Ninety-seven patients were confirmed oper- atively and pathologically. enhanced CT scan was performed with intravenous injection bolus of ap- proximately 75-120 ml (1-1.5 ml/kg body weight) contrast medium at a rate of 2.5-3 ml/s. In 68 pa- tients receiving dual-phase scan, the delayed scan time of arterial and venous phases was 18-20 s and 60-70 s, respectively, and in 29 patients receiving three-phase scan, the delayed scan time of arterial, pancreatic and portal venous phases was 18 s, 40 s and 75 s, respectively, with a slice of 3-5 mm thick- ness, a pitch of 1-1.5, and a reconstruction interval of 2.5-4.8 mm. Results: Positive and negative predictive values of un- resectable tumors were 97.65% and 75.86%, respec- tively. The sensitivity and accuracy were 90.67% and 90. 72%, respectively. Positive predictive values of dual-phase and three-phase were 95.83% and 100%, respectively; negative predictive values were 75% and 77.78%, respectively. Conclusions: Spiral multi-phase CT is superior in re- vealing the involvement of peripancreatic vessels, the invasion of the neighboring organs, the size, shape and range of carcinoma, and the metastasis of liver and lymph node. The predictability of resection is obviously increased for patients with pancreatic car- cinoma.

关键词： pancreatic carcinoma surgery spiral computed tomography (CT) enhanced scan

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Conflict-Avoidance-Driven Test Generation and Test Point Insertion for Transition Faults in Broadside scan Testing

Conflict-Avoidance-Driven Test Generation and Test Point Ins...

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第五届中国测试学术会议

作者： Dong Xiang Boxue Yin School of Software,Tsinghua University, Beijing 100084,China Zhen Chen Dept.of Computer Science and Technology,Tsinghua University,Beijing 100084,China

＜正＞Test pattern generation of a transition fault for a broadside scan designed circuit is partitioned into two time frames based on the single stuck-at fault test generation.Test generation of a transition fault in a broadside scanned circuit is to drive the signal requirements in the second frame away from the pseudo-primary inputs that can be influenced by the specified inputs in the first frame.Potential conflicts produced by the signal requirements on the pseudo-primary outputs must also be avoided.The signal requirements at the pseudo-primary inputs of the second frame are partitioned into separate connected components based on an input dependency graph.Test pattern generation reduces to satisfaction of the signal related to the signal requirements connected components one by one.Control test points are inserted away from the testable critical paths to satisfy the necessary signal requirements of the faults that are testable for enhanced scan testing,but are untestable in the broadside scan testing.New techniques are used to reduce the pin overhead based on the two time-frame circuit model. Sufficient experimental results are presented to demonstrate the efficiency of the proposed method.

关键词： Broadside delay testing enhanced scan scan testing for transition faults test pattern generation

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