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Clinical significance of mesenteric panniculitis-like abnormalities on abdominal computerized tomography in patients with malignant neoplasms 被引量:8
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作者 Eli D Ehrenpreis Grigory Roginsky Richard M Gore 《World Journal of Gastroenterology》 SCIE CAS 2016年第48期10601-10608,共8页
AIM To clarify the association of malignancy with mesenteric panniculitis-like changes on computed tomography(CT).METHODS All abdominal CT scans performed at North Shore University HealthS ystem showing mesenteric pan... AIM To clarify the association of malignancy with mesenteric panniculitis-like changes on computed tomography(CT).METHODS All abdominal CT scans performed at North Shore University HealthS ystem showing mesenteric panniculitis from January 2005 to August 2010 were identified in the Radnet(Rad Net Corporation, Los Angeles, CA) database. Patients with a new or known diagnosis of a malignancy were included for this analysis. Longitudinal clinical histories were obtained from electronic medical records.RESULTS In total, 147794 abdominal CT scans were performed during the study period. Three hundred and fiftynine patients had mesenteric panniculitis(MP)-like abnormalities on their abdominal CT. Of these patients, 81 patients(22.6%) had a known history of cancer at the time of their CT scan. Nineteen(5.3%) had a new diagnosis of cancer in concurrence with their CT, but the majority of these(14/19, 74%) were undergoing CT as part of a malignancy evaluation. Lymphomas were the most common cancers associated with MPlike findings on CT(36 cases, 36%), with follicular lymphoma being the most frequent subtype(17/36). A variety of solid tumors, most commonly prostate(7) and renal cell cancers(6) also were seen. CT follow up was obtained in 56 patients. Findings in the mesentery were unchanged in 45(80%), worsened in 6(11%), and improved in 5 patients(9%). Positron emission tomography(PET) scans performed in 44 patients only showed a positive uptake in the mesenteric mass in 2 patients(5%). CONCLUSION A new diagnosis of cancer is uncommon in patients with CT findings suggestive of MP. MP-like mesenteric abnormalities on CT generally remain stable in patients with associated malignancies. PET scanning is not recommended in the evaluation of patients with mesenteric panniculitis-like findings on CT. 展开更多
关键词 PANNICULITIS PERITONEAL x ray Neoplasms computed tomography Small INTESTINE Misty MESENTERY Lymphoma tomography Positron emission tomography
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Temporal Trends in Radiation Dose Associated with Coronary Computed Tomography Angiography
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作者 Paolo Marraccini Alessandro Mazzarisi +7 位作者 Clara Carpeggiani Mathis Schluter Marco Brambilla Massimiliano Bianchi Lorenzo Faggioni Giuseppe Coppini Carlo Bartolozzi Eugenio Picano 《Open Journal of Radiology》 2014年第1期101-110,共10页
Background: In 2010, the International Atomic Energy Agency launched the “3A’s campaign” as an effective tool for primary cancer prevention. In 2011, the American Association of Physicists in Medicine recommended t... Background: In 2010, the International Atomic Energy Agency launched the “3A’s campaign” as an effective tool for primary cancer prevention. In 2011, the American Association of Physicists in Medicine recommended the size specific dose estimate (SSDE). Objectives: To audit doses of Coronary CT Angiography (Coronary CTA) in tertiary care referral center. Methods: We reviewed 998 consecutive Coronary CTA (from 2007 to 2012). Doses (CTDIvol mGy), DLP (mGy*cm), effective dose (DLP*0.014, mSv) were on-line archived. SSDE was estimated retrospectively. Appropriateness score was evaluated for exams performed from the 2010. Results: Overall median dose per Coronary CTA was 49.7 mGy for CTDIvol, 55.5 mGy for SSDE, 994.96 mGy*cm for DLP, 13.9 mSv for effective dose. Median DLP decreased over time (1452.94 in 2007, 1605.56 in 2008, 1113.49 in 2009, 759.99 in 2010, 448.61 in 2011 and 497.88 mGy*cm in 2012, p < 0.0001). SSDE was proportional to the size dependent factor (SDF);in patients with SDF > 1 (88%) CTDIvol underestimated SSDE (48.49 vs 57.19 mGy), whilst in patients with SDF < 1 (12%) CTDIvol overestimated SSDE (56.46 vs 50.3 mGy). Scans were appropriate in 58%, uncertain in 24%, and inappropriate in 18% of cases. Doses were similar in appropriate, uncertain or inappropriate examinations and in excellent-to-good (81%) vs. sufficient-to-poor (19%) image quality exams. Conclusions: Coronary CTA reference doses can be very misleading. SSDE can allow individual technique optimization. The dose is similar in appropriate and inappropriate examinations, and unrelated to image quality. The rate of inappropriate examinations is still too high even after dissemination of guidelines. 展开更多
关键词 ISCHEMIC Heart Disease x ray CARDIAC computed tomography CARDIOVASCULAR Imaging Radiation DOSING
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The Different Patterns of Coronary Artery Calcification in Acute and Chronic Coronary Syndromes Determined by Electron Beam Computed Tomography
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作者 杜志民 罗初凡 +5 位作者 胡承恒 李怡 伍贵富 李向民 冯君 马虹 《South China Journal of Cardiology》 CAS 2002年第2期63-71,76,共10页
Objectives To compare the different patterns of coronary artery calcification (CAC) in acute and chronic coronary syndromes utilizing electron beam computed tomography. Background Pathologic, angiographic, and intraco... Objectives To compare the different patterns of coronary artery calcification (CAC) in acute and chronic coronary syndromes utilizing electron beam computed tomography. Background Pathologic, angiographic, and intracoronary ultrasound studies revealed sharp differences in the plaque morphology between patients with acute versus chronic coronary syndromes. Whether there are different patterns of coronary artery calcification in patients with stable angina pectoris (SAP) and in those with unstable angina pectoris (UAP) or acute myocardial infarction (AMI), however, remains unclear. Methods Two hundred and sixty - four patients, including 67 with SAP, 94 with UAP and 103 with AMI were studied with electron beam computed tomography for analysis of coronary artery calcification and with selective coronary angiography for determination of atherosclerotic lesions. CAC prevalence and calcium score were compared among three groups, and relation of CAC to the severity of atherosclerotic disease in the SAP and UAP patients was separately analyzed. Results Prevalence of CAC was 100 % in the SAP patients, significantly higher than the 87. 23 % in UAP patients and 86. 41 % among the patients with AMI ( P < 0. 05) . More patients and arteries in the SAP group had severe forms of calcium than those in the UAP and AMI group ( P < 0. 01), and the mean LN [CS + 1] (natural logarithm transformation of calcium score) of the SAP patients was much greater than that of the UAP and AMI patients (P < 0.001). The distribution of vessels with various CAC by luminal stenosis was different between SAP and UAP patients. The average CAC extent of the infarct - related arteries was less severe than that of the noninfarct - related arteries. Conclusions U-tilizing electron beam computed tomography, we demonstrated that there exist different patterns of coronary artery calcification in patients with acute versus chronic coronary syndromes, which may provide insight into the differences observed in the clinical and pathologic development between these two types of coronary artery disease. 展开更多
关键词 Coronary artery disease Calci-fication tomography/x - ray computed
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Computerized tomography pleurography: a new method for detecting minor pleural lesion
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作者 巩若箴 武乐斌 《Chinese Medical Journal》 SCIE CAS CSCD 2001年第9期41-44,106,共5页
Objectives To evaluate the ability of CT pleurography (CTP) in detecting minor pleural lesions in patients with pleural effusion and to assess its value in distinguishing malignant from benign pleural lesions. Method... Objectives To evaluate the ability of CT pleurography (CTP) in detecting minor pleural lesions in patients with pleural effusion and to assess its value in distinguishing malignant from benign pleural lesions. Methods A prospective study of 50 patients with pleural effusion was conducted using conventional CT and CTP. CT scan was run after injecting an appropriate amount of contrast medium into the pleural cavity. Results In 24 patients, all lesions detected by conventional CT were demonstrated by CTP. In 13 of 24 patients, CT pleurography detected additional lesions. In 20 of 26 patients with negative findings on conventional CT, CTP was capable of demonstrating the presence of pleural lesions. The sensitivity, specificity and accuracy of detecting pleural lesions were 25%, 100% and 30% for conventional CT, 86%, 100% and 87% for CTP, respectively. Conclusion CTP is superior to conventional CT in detecting and for the differential diagnosis benign and malignant pleural lesions. 展开更多
关键词 pleural effusion · contrast media · tomography · x ray computed
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A CT-based radiomics nomogram for prediction of human epidermal growth factor receptor 2 status in patients with gastric cancer 被引量:14
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作者 Yexing Li Zixuan Cheng +12 位作者 Olivier Gevaert Lan He Yanqi Huang Xin Chen Xiaomei Huang Xiaomei Wu Wen Zhang Mengyi Dong Jia Huang Yucun Huang Ting Xia Changhong Liang Zaiyi Liu 《Chinese Journal of Cancer Research》 SCIE CAS CSCD 2020年第1期62-71,共10页
Objective: To develop and validate a computed tomography(CT)-based radiomics nomogram for predicting human epidermal growth factor receptor 2(HER2) status in patients with gastric cancer.Methods: This retrospective st... Objective: To develop and validate a computed tomography(CT)-based radiomics nomogram for predicting human epidermal growth factor receptor 2(HER2) status in patients with gastric cancer.Methods: This retrospective study included 134 patients with gastric cancer(HER2-negative: n=87;HER2-positive: n=47) from April 2013 to March 2018, who were then randomly divided into training(n=94) and validation(n=40) cohorts. Radiomics features were obtained from the CT images showing gastric cancer. Least absolute shrinkage and selection operator(LASSO) regression analysis was utilized for building the radiomics signature. A multivariable logistic regression method was applied to develop a prediction model incorporating the radiomics signature and independent clinicopathologic risk predictors, which were then visualized as a radiomics nomogram. The predictive performance of the nomogram was assessed in the training and validation cohorts.Results: The radiomics signature was significantly associated with HER2 status in both training(P<0.001) and validation(P=0.023) cohorts. The prediction model that incorporated the radiomics signature and carcinoembryonic antigen(CEA) level demonstrated good discriminative performance for HER2 status prediction,with an area under the curve(AUC) of 0.799 [95% confidence interval(95% CI): 0.704-0.894] in the training cohort and 0.771(95% CI: 0.607-0.934) in the validation cohort. The calibration curve of the radiomics nomogram also showed good calibration. Decision curve analysis showed that the radiomics nomogram was useful.Conclusions: We built and validated a radiomics nomogram with good performance for HER2 status prediction in gastric cancer. This radiomics nomogram could serve as a non-invasive tool to predict HER2 status and guide clinical treatment. 展开更多
关键词 GASTRIC cancer human EPIDERMAL growth factor receptor 2 radiomics x ray computed tomography
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Findings of non-pathologic perfusion defects by CT arterial portography and non-pathologic enhancement of CT hepatic arteriography 被引量:11
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作者 LI Li, WU Pei Hong, LIN Hao Gao, LI Jin Qing, MO Yun Xian, ZHENG Lie, LU Li Xia, RUAN Chao Mei and CHEN Lin 《World Journal of Gastroenterology》 SCIE CAS CSCD 1998年第6期58-60,共3页
AIM To recognize the characteristic findings of non pathologic perfusion defects with CT arterial portography (CTAP) and nonpathologic enhancement found in CT hepatic arteriography (CTHA). METHODS The manifestatio... AIM To recognize the characteristic findings of non pathologic perfusion defects with CT arterial portography (CTAP) and nonpathologic enhancement found in CT hepatic arteriography (CTHA). METHODS The manifestations of nonpathologic perfusion defects with CTAP and non pathologic enhancement found in CTHA were analyzed in 50 patients with primary hepatocellular carcinoma. RESULTS The false positive rate of perfusion defects detected in CTAP was 15 1%. The shapes of perfusion defects were peripheral wedge, small, round, and patchy. The occurrence rate of non pathologic enhancement found in CTHA was 22 0%. The shapes of non pathologic enhancement were small, round, irregular, and wedge. CONCLUSION There was a high frequency of non pathologic perfusion defects detected with CTAP and non pathologic enhancement found in CTHA. The simultaneous use of both procedures may help decrease the false positive rate, and increase the veracity of diagnosis for hepatocellular carcinoma. 展开更多
关键词 liver neoplasms/radiography carcinoma hepato cellular/radiography HEPATIC ARTERIOGRAPHY tomography x ray computed
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月经前期发作的鼻源性头痛 被引量:2
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作者 李长清 张友骥 +3 位作者 张明欣 唐少松 王风祥 孙焕平 《中国耳鼻咽喉头颈外科》 北大核心 2008年第8期484-485,共2页
随着鼻窦CT诊断和鼻内镜诊疗技术的发展,大量鼻部疾病导致的头痛得以治愈。根据2004年国际头痛协会的分类,鼻源性头痛的第二种类型——黏膜接触点性头痛(mucosa contact point headache),因为缺少典型的鼻部症状,而分散就诊于其... 随着鼻窦CT诊断和鼻内镜诊疗技术的发展,大量鼻部疾病导致的头痛得以治愈。根据2004年国际头痛协会的分类,鼻源性头痛的第二种类型——黏膜接触点性头痛(mucosa contact point headache),因为缺少典型的鼻部症状,而分散就诊于其他学科,长期得不到合理诊疗。我们近期总结了多例临床上没有典型的鼻部症状,而是以各种类型的头痛为主诉就诊于神经内科等专科的患者,经过会诊筛查,确诊为鼻源性黏膜接触点性头痛,通过鼻内镜手术治愈。其中包括1组女性患者,长期被误认为是月经前期头痛,通过治疗证明是黏膜接触点性头痛的一种特殊存在形式,撰文总结如下。 展开更多
关键词 头痛(Headache) 月经(Menstruation) 鼻内镜检查(Endoscopy) 体层摄影术 x线计算机(tomography xray computed) 鼻源性头痛(rhinogenic headache)
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食管黏膜下异物的CT诊断 被引量:3
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作者 林益和 《中国耳鼻咽喉头颈外科》 北大核心 2006年第11期799-800,共2页
总结1995-2004年10年间治疗的351例食管异物患者其中首次手术未发现异物12例,X线透视检查无阳性表现15例。此27例患者.经CT薄层扫描确诊,行食管镜检查取出并治愈,现报道如下。
关键词 食管疾病(Esophageal Diseases) 异物(Foreign Bodies) 体层摄影水 x线计算机(tomography xray computed)
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CT Manifestations of Lung Changes and Complications in Patients with Severe Acute Respiratory Syndrome
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作者 张雪哲 王武 +4 位作者 卢延 黄振国 洪闻 尚燕宁 任安 《Chinese Journal of Integrated Traditional and Western Medicine》 2003年第4期254-258,共5页
Objective:To investigate the rol e of CT scanning in diagnosing severe acute respiratory syndrome(SARS). Methods: One hundred and twelve times of spiral CT scanning, 106 t imes on the chest with standard pulmonary and... Objective:To investigate the rol e of CT scanning in diagnosing severe acute respiratory syndrome(SARS). Methods: One hundred and twelve times of spiral CT scanning, 106 t imes on the chest with standard pulmonary and mediastinal window, 5 on the brain and once on the abdomen, were performed in 82 patients (37 males and 45 females ) of SARS. Results: Bilateral shadows showed in 66 patients (80.48%) and unil ateral shadow in 16 (19.52%). The lung CT findings were sub pleural focal con solidation in 26 patients (31.70%), flaky cloudy opacity in 53 (64.63%), large a rea consolidation in 9 (10.97%), ground glass blurry shadow in 31 (37.80%), a lveolar substantive shadow in 14 (17.07%) and interstitial changes in 16 (19.51% ). The pulmonary CT signs of SARS were relatively characterized by: (1) The lesi ons tending to multiply occur, mostly to be bilaterally distributed and commonly involved in the lower lung field. (2) The lung shadows mostly showed as sub pleural focal consolidation, flaky cloudy shadow, large area consolidation, grou nd glass blurry shadow, and often accompanied with signs of broncho inflat ion. (3) Having opacified nodular shadows in the alveolar cavities. (4) Rapid pr ogressions or changes on the size, amount, and distribution of the lesions likel y to be found in dynamic observation of chest X ray and CT scanning, i.e., ma rkedly dynamic changes found within 24 to 48 hrs. Lesions with these characteris tics may be recognized as pulmonary changes possibly induced by SARS. Complicati ons were found in 6 patients (7.31%), including tuberculosis of lung and brain a ccompanied with pneumomediastinum in one patient, secondary infection of lung in 2, pneumothorax in 1, pulmonary fungus in 1, and pyothorax in 1.Conclusion: CT scanning is a sensitive method for diagnosis of SAR S, by which more accurate assessment of the abnormal changes of lung and occurre nce of complications in SARS patients can be made. 展开更多
关键词 severe acute respiratory syndrome comput erized x ray tomography CHEST COMPLICATION
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慢性鼻窦炎鼻窦CT的评估分类 被引量:3
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作者 赵红 魏永祥 《国际耳鼻咽喉头颈外科杂志》 2006年第2期95-98,共4页
由于鼻内窥镜技术和CT扫描检查在临床的广泛应用,对于慢性鼻窦炎外科治疗日益受到国内外医师的重视。国外许多专家学者建立了多种临床评估系统以准确判断慢性鼻窦炎的严重程度,既便于临床医师接受,又可以指导药物和外科治疗。评估方法... 由于鼻内窥镜技术和CT扫描检查在临床的广泛应用,对于慢性鼻窦炎外科治疗日益受到国内外医师的重视。国外许多专家学者建立了多种临床评估系统以准确判断慢性鼻窦炎的严重程度,既便于临床医师接受,又可以指导药物和外科治疗。评估方法越简便易行其接受程度就越高。而判断慢性鼻窦炎的病理情况,CT比症状表现和鼻内镜下的表现更准确,故临床评估多以CT为判断依据。本文综述了目前国内外的研究现状和CT评估方法,同时指出了研究中的不足。 展开更多
关键词 体层摄影术 x线计算机(tomography x-ray computed) -鼻窦炎(Sinusitis)
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Clinical and imaging findings in patients with severe acute respiratory syndrome 被引量:3
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作者 赵振军 梁长虹 +2 位作者 张金娥 张汝绵 何晖 《Chinese Medical Journal》 SCIE CAS CSCD 2003年第7期1104-1105,共2页
Objective To investigate the clinical and imaging characteristics of severe acute respiratory syndrome (SARS), and to study their relationship Methods Forty six SARS confirmed patients were admitted to our hospi... Objective To investigate the clinical and imaging characteristics of severe acute respiratory syndrome (SARS), and to study their relationship Methods Forty six SARS confirmed patients were admitted to our hospital from February to April, 2003 X ray examination documents were available in all cases and chest CT scanning was acquired in 6 cases, which were analyzed retrospectively, accompanied by their clinical features Results Fever was found in 97 8% of the patients Clinical symptoms were mild, but X ray and CT findings were distinct CT scanning demonstrated ground glass like lesions and large patchy exudation and consolidation at the early stage in 6 cases Different findings on radiography and CT were related to the different phases of the disease After treatment, most lesions were absorbed completely, but slowly in patients with multi lobe consolidation and/or extensive interstitial infiltration Conclusion Special clinical and imaging findings could be found in SARS cases The prognosis of SARS patients is related to the degree of lesions detected by radiography and CT 展开更多
关键词 severe acute respiratory syndrome RADIOGRAPHY x ray computed tomography
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CT and MRI diagnosis of acute traumatic hepatic rupture:analysis of ten cases
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作者 王仁贵 崔红 +2 位作者 山元章生 高玉洁 李松年 《Chinese Journal of Traumatology》 CAS 1999年第1期38-43,共6页
In order to verify whether magnetic resonance imaging (MRI) is superior to computed tomography (CT) in the detection and characterization of intrahepatic hematoma in its acute stage, the MRI and CT features of acute t... In order to verify whether magnetic resonance imaging (MRI) is superior to computed tomography (CT) in the detection and characterization of intrahepatic hematoma in its acute stage, the MRI and CT features of acute traumatic hepatic rupture (ATHR) were retrospectively studied and compared. Methods: In the 10 cases of ATHR admitted to our institute, 3 were examined with CT, 1 with MRI and 6 with both CT and MRI in the first 24 hours post injury and 9 cases out of the 10 were checked up with MRI in the first week after injury of surgery. The shape of the traumatic lesions, the damages of the intrahepatic vessels and the severity of hepatic rupture displayed with CT and MRI were compared. Results: It was found that in the first 24 hours post injury, 66.6% of hepatic injuries were shown as hypointensity on T1 weighted images and low or high density on noncontrast CT. 100% of the lesions were identified as well marked hyperintensity on T2 weighted images. Damages of the hepatic and/or portal veins were observed in 7, 4 and 3 cases on T2 and T1 weighted images and noncontrast CT figures respectively. The severity of hepatic injuries were graded in 100%, 66.7% and 44.4%of cases with these 3 procedures respectively. Conclusions: On the basis of our findings, it is concluded that T2 weighted MRI is a more sensitive and reliable imaging modality in the detection and differentiation of the type and severity of acute hepatic rupture than T1 weighted imaging and noncontrast CT. 展开更多
关键词 Liver Wounds and injuries tomography x ray computed Magnetic resonance imaging
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