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find Keyword "螺旋CT" 82 results
  • Multidetector CT and Magnetic Resonance Imaging Features of Solitary Fibrous Tumors in the Pelvis and the Relevant Pathologic Basis Changes

    In order to investigate the features of multidetector CT (MDCT) and magnetic resonance imaging (MRI) as well as the corresponding pathogic basis of solitary fibrous tumor (SFT) in the pelvis, we collected the clinical data of 13 patients with pathologically confirmed SFT in pelvis, and retrospectively reviewed the MDCT and MRI appearances. Of these enrolled patients, 6 received MDCT scans, 5 underwent MRI scans, and 2 underwent both MDCT and MRI examinations. Shown on the MDCT and MRI, the maximum diameters of the masses ranged from 4.0 to 25.2 cm (averaged 11.8 cm). Six masses were lobulated, and seven were round or oval. In addition, all masses were well-defined and displaced the adjacent structures to some degrees. On the computed tomography, all masses were of isodensity on unenhanced scans in general, among which five masses were demonstrated with hypodense areas. On the MRI T1-weighted image, all lesions were isointense, of which patchy hypointense areas were detected in 3 cases and radial hypointense areas were in 3 cases, and the other one was presented with homogenous intensity. On T2-weighted images, most of the lesions were mixed hyperintense, of which 3 cases were of heterogenous hyperintesity, radial hypointense areas were detected in 3 patients, and the other one was homogenously intense. On enhanced computed tomography and MRI, large supplying vessels were found in 4 cases; 12 cases showed moderate to conspicuous enhancement, and the other one was presented with mild homogenous enhancement. Of the patients with moderate to conspicuous enhancement, patchy areas of non-enhancement were detected in 7 cases, radial areas of progressive enhancement were detected in 3 cases, and the remained 2 cases showed homogenous enhancement. On pathology, the radial area presented as progressive enhancement was fibrosis. During the follow-ups after surgery, 2 patients had local recurrence and 1 had metastasis to liver. In conclusion, the SFT in the pelvis are commonly presented as a large solid, well-defined and hypervascular mass with necrosis or cystic changes at some extents together with the displacement of adjacent structures. The radial area with hypointensity on T2-weighted image and with progressive enhancement on enhanced magnetic resonance imaging is an important feature of SFT, which can be helpful for the diagnosis of this mass.

    Release date:2021-06-24 10:16 Export PDF Favorites Scan
  • Predictive value of dynamic contrast-enhanced magnetic resonance imaging combined with multislice CT enhanced scanning for pathological remission after neoadjuvant chemotherapy in breast cancer

    ObjectiveTo evaluate the predictive value of dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) combined with multislice computed tomography (MSCT) in the evaluation of neoadjuvant chemotherapy (NACT) for breast cancer. MethodsThe clinical, imaging, and pathological data of breast cancer patients who received NACT in the Affiliated Hospital of Southwest Medical University from February 2019 to August 2021 were retrospectively collected. Based on the results of postoperative pathological examination, the patients were assigned into significant remission (Miller-Payne grade Ⅰ–Ⅲ) and non-significant remission (Miller-Payne grade Ⅳ–Ⅴ). The variables with statistical significance by univariate analysis or factors with clinical significance judged based on professional knowledge were included to conduct the logistic regression multivariate analysis to screen the risk factors affecting the degree of pathological remission after NACT. Then, the screened risk factors were used to establish a prediction model for the degree of pathological remission of breast cancer after NACT, and the efficacy of this model was evaluated using the receiver operating characteristic (ROC) curve, calibration curve, and decision curve analysis (DCA) curve. ResultsAccording to the inclusion and exclusion criteria, a total of 211 breast cancer patients who received NACT were collected, including 116 patients with significant remission and 95 patients with non-significant remission. Logistic regression multivariate analysis results showed that the human epidermal growth factor receptor 2 positive, lower early enhancement rate after NACT, lower arterial stage net increment after NACT, and lower CT value of arterial phase of lesions would increase the probability of significant remission in patients with breast cancer after NACT (P<0.05). The area under the ROC curve of the model for predicting the degree of pathological remission of breast cancer after NACT was 0.984, the specificity was 93.7%, and the sensitivity was 95.7%. The calibration curve showed that the model result fit well with the actual result, and the DCA result showed that it had a high clinical net benefit value. ConclusionFrom the results of this study, DCE-MRI combined with MSCT enhanced scanning has a good predictive value for pathological remission degree after NACT for breast cancer, which can provide clinical guidance for further treatment.

    Release date:2023-02-24 05:15 Export PDF Favorites Scan
  • Preoperative Evaluation Value of Multislice Spiral Computed Tomography Angiography for Normative Radical Gastrectomy

    ObjectiveTo explore the evaluation value of preoperative multislice spiral computed tomography angiography (MSCTA) for normative radical gastrectomy. MethodsThe anatomic distributions of celiac trunk and its three branches and their tributaries (common hepatic artery, right hepatic artery, left hepatic artery, splenic artery, and left gastric artery) of 86 patients with gastric cancer were comprehended by preoperative MSCTA, which were verified during the surgery. Simultaneously preoperative TNM staging was evaluated by MSCTA, which compared with postoperative pathological results. ResultsThe accuracy rate of preoperative MSCTA evaluating the distribution of celiac trunk and its three branches and their tributaries was 100%. Abnormal hepatic arteries were found in 22 cases by MSCTA, the mutation rate was 25.58%. Abnormal right hepatic arteries were found in 11 cases (12.79%), abnormal left hepatic arteries in 7 cases (8.14%), both abnormal right and left hepatic arteries in 1 case (1.16%), and abnormal common hepatic arteries in 3 cases (3.49%). Straight splenic arteries were found in 24 cases (27.91%), slightly curved splenic arteries in 44 cases (51.16%), and significantly curved splenic arteries in 18 cases (20.93%). Compared with postoperative pathological results, the accuracy rates of preoperative MSCTA evaluating gastric cancer T, N, and M staging were 75.58%(65/86), 74.42%(64/86), and 91.86%(79/86), respectively. ConclusionsPreoperative MSCTA is an objective way to assess the distributions of celiac artery trunk and related tributaries of patients with gastric cancer. Also, it is an accurate method to evaluate the preoperative TNM stage of gastric cancer, which can help to make an individual operative plan and avoid the intraoperative injury of the artery.

    Release date:2016-09-08 10:40 Export PDF Favorites Scan
  • Diagnostic Value of Mandibular Fractures by Multiple Spiral Computed Tomography

    目的 探讨多层螺旋CT对下颌骨骨折的诊断价值。 方法 对2007年4月-2009年10月下颌骨不同部位骨折的45例患者进行多层螺旋CT轴位扫描,并行多平面、表面遮盖法等三维重建,对下颌骨骨折CT表现特征作回顾性分析。 结果 45例下颌骨骨折中,位于下颌体骨折24例,下颌角骨折5例,下颌升支骨折6例,髁部骨折13例,冠突骨折2例;颞下颌关节脱位中,单侧脱位3例,双侧脱位5例。 结论 多层螺旋CT能准确诊断下颌骨各部位骨折,对诊治方案具有重要价值。

    Release date:2016-09-08 09:49 Export PDF Favorites Scan
  • Evaluation of Mutidetector Computer Tomography in Diagnosing TN Staging and Typing of Adenocarcinoma of Esophagogastric Junction

    Objective To evaluate the clinical value of multi-detector row helical CT (MDCT) in Diagnosing the TN staging and typing of adenocarcinoma of esophagogastric junction. Methods From January 2008 to June 2011,149 consecutive cases with AEG confirmed surgery were examined by using MDCT scanner before surgery in West China Hospital,pathologic and operative finding diagnosis were correlated with that results of MDCT . Results The accuracies of MDCT for the T1, T2, T3, and T4 staging was 97.3%,91.3%,84.5%, and 89.3%,respectively, and for the typing of Ⅰ,Ⅱ, andⅢwas 84.6%, 63.8%, and 79.2%,respectively. The accuracies of MDCT to judge the metastasis of lymph node was 88.6%(132/149). The feature of metastasis of lymph node with circular and fusion,significantly and obviously enhanced,ring and heterogeneous enhanced, which the positive rate of pathological metastasis was higher (P=0.000). Conclusions MDCT is an excellent diagnostic tool for the diagnosis of the TN staging and typing of AEG, which is useful for the selection of the surgical procedure and decision operation path.

    Release date:2016-09-08 10:37 Export PDF Favorites Scan
  • 食管异物及合并主动脉食管瘘的诊断与治疗

    目的探讨食管异物所致主动脉食管瘘的诊断及治疗方法。 方法回顾性分析2004年1月至2012年12月南昌大学第二附属医院32例异物性食管损伤患者的诊断和治疗经验。其中男21例、女11例,年龄18~78岁。采用多层螺旋CT(MSCT)及其影像后处理对食管异物病理变化进行准确分级;对主动脉食管瘘的患者采用包括杂交技术(覆膜支架腔内隔绝术+胸腔镜纵隔引流术)为主的治疗方案,总结MSCT和杂交技术在异物性主动脉食管瘘诊疗中的应用价值。 结果平扫影像诊断与临床诊断符合率为75%(24/32),影像后处理诊断与临床诊断符合率为100%(17/17)。MSCT分级所有Ⅰ级、Ⅱ级和Ⅲ级患者均治愈出院,4例Ⅳ级患者采用杂交技术治疗;7例Ⅳ级主动脉食管瘘患者中有5例痊愈出院,2例死亡,因开胸行主动脉修补术中死亡1例,开胸行主动脉置换术后24 h内死亡1例。30例痊愈出院患者随访6个月,除1例Ⅳ级患者有轻微背痛以外,其他患者无不适。 结论MSCT对食管异物性损伤的准确分级和治疗方式选择均有重要的价值,杂交技术治疗异物性主动脉食管瘘具有重要的临床意义。

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  • Correlation of MSCT Imaging Feature with Pathologic Grading of Pancreatic Neuroen-docrine Neoplasm

    ObjectiveTo investigate value of MSCT imaging on differentiating low grade pancreatic neuroendo-crine neoplasms (pNENs) from non-low grade pNENs. MethodThe clinical and CT data of 32 patients with pNENs,who were confirmed by pathological diagnosis from January 2014 to August 2015,were collected and analyzed retrospec-tively. ResultsThere were 15 patients with grade 1 in the low grade pNENs group,there were 11 patients with grade 2 and 6 patients with grade 3 in the non-low grade pNENs group.Compared with the low grade pNENs,the non-low grade pNENs had the larger diameter of the tumor (P=0.007),irregular tumor shape (P=0.006),obscure tumor margin (P=0.003),peripancreatic tissue or vascular invasion (P=0.036),lymphadenopathy (P=0.003),distant metastasis (P=0.019),lower absolute enhancement of tumor at the arterial (P=0.003) and the relative enhancement of tumor at the arterial (P=0.013). ConclusionThe analysis of MSCT features might help for differentiating low grade pNENs from non-low grade pNENs,so that more timely selection of appropriate treatment strategies would be made.

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  • Evaluation of Hernias of Abdominal Wall with Multislice CT

    目的:探讨螺旋CT对腹壁疝的诊断价值和临床意义。方法: 收集被手术证实的腹壁疝86例,术前均进行螺旋CT检查。观察腹壁疝的部位、数目、疝囊大小、疝内容物及并发症。结果: 86例腹壁疝中,腹股沟斜疝38例(双侧7例),腹股沟直疝8例,腹壁切口疝19例,造瘘口疝6例,闭孔疝3例,脐疝8例,白线疝2例,双侧腹股沟斜疝伴右下腹壁切口疝1例,双测腹股沟斜疝伴左下腹壁造瘘口疝1例。疝囊直径在5cm以下者45例, 6~10cm者38例, 10cm以上者3例,腹壁疝伴小肠不全梗阻者21例,切口疝伴感染1例。螺旋CT可以显示腹壁疝的种类、数目、疝囊大小、疝内容物类型及存在的并发症.结论: 螺旋CT是腹壁疝的一种非常有效的检查方法,可以为外科综合评价患者病情及进行有效手术治疗提供重要依据。

    Release date:2016-09-08 10:04 Export PDF Favorites Scan
  • Clinical Application of Multi-Slice Spiral CT in Portal Vein Imaging

    Objective To study the clinical significance of multi-slice spiral CT in portal vein imaging. Methods One hundred and thirty seven cases underwent enhanced scan with GE Light SpeedQX/i4 CT scanner were collected, including 41 cases of liver cancer, 20 cases of hepatic cirrhosis, 21 cases of cavernous hemangioma of liver, 9 cases of hepatic abscess, 6 cases of carcinoma of gallbladder, 14 cases of cholangiocarcinoma, 16 cases of pancreatic carcinoma, and 5 cases in normal. The results of portal vein images were reconstructed with three-dimensional software and analyzed. Results In 109 cases, portal vein, cranial mesenteric vein, and splenic vein were demonstrated successfully in the stage of portal vein: volume rendering images were clear in 84 cases, and maximum intensity projection images and multiplanar reconstruction images were clear in 109 cases. Forty-five cases of portal hypertension, 18 cases of opened collateral circulation, 15 cases of portal vein tumor thrombus, 1 case of splenic vein tumor thrombus, and 6 cases of large cavernous hemangioma were demonstrated successfully. Conclusion The portal vein imaging with multi-slice spiral CT can show the dissection and lesions of portal vein and its branches clearly, and can provide the clinical evidence for clinicians to formulate a treatment plan correctly.

    Release date:2016-09-08 10:49 Export PDF Favorites Scan
  • Value of MultiDetector CT in Diagnosis of Bare Area Involvement in Gastric Carcinoma

    【Abstract】ObjectiveTo study the CT features of bare area involvement in gastric carcinoma and their anatomicpathological basis, and to evaluate the role of multi-detector CT in the diagnosis of bare area involvement. Methods In 196 consecutive gastric carcinoma cases, 56 were found bare area involvement and divided into proximal gastric carcinoma (PGC) group and distal gastric carcinoma (DGC) group according to anatomic position of primary tumor. CT images and incidence of gastric bare area (GBA) involvement in the PGC group were observed and compared with those of DGC group. Results The lesion appeared as nodule or mass in bare area in 46 cases and as metastatic lymphadenopathy in 10 cases. CT features of GBA involvement included: ① widening of gastric bare area and blurring or obliteration of the thin fat strip between gastric wall and diaphragm; ② irregular mass with heterogeneous enhancement or round lymph nodes in GBA; ③ irregular thickening of left diaphragmatic crus or gastrophrenic ligament with blurring border to the mass; ④ other metastatic lymph nodes in subphrenic extroperitoneal space. The incidence of GBA involvement in PGC group was 70.0%(42/60), significantly difference from those in DGC group (10.3%,14/136) ,P=0.025. Conclusion The incidence of GBA involvement in PGC group is significantly higher than those in DGC group. Multidetector CT is very useful for preoperative imaging evaluation of bare area involvement and lymphatic spread.

    Release date:2016-09-08 11:54 Export PDF Favorites Scan
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