PET/CT显像在探测卵巢癌术后复发、转移中的应用

目的探讨PET／CT在探测和诊断卵巢癌术后复发、转移中的应用价值。方法回顾性分析54例卵巢癌术后患者全身或局部PET／CT显像结果。临床随访时间3～20个月。确诊依据为手术病理检查、多种影像学检查和临床随诊。结果54例中41例有肿瘤复发、转移，13例无肿瘤复发。PET／CT诊断肿瘤复发、转移的灵敏度为90．2％，特异性为84．6％。与PET／CT显像前的CT、B超检查结果比较，9例腹腔及盆腔常规CT和（或）B超检查阴性者，PET／CT显像于腹腔及盆腔发现1处或多处隐匿性恶性肿瘤病灶，31．7％的患者PET／CT显像发现多处病灶且提示肿瘤广泛转移，从而改变临床分期和治疗方案。转移灶的分布以腹腔和盆腔为主，远处转移较少。19例患者糖类抗原（CA）125升高，PET／CT显像阳性率为89．4％。结论PET／CT显像能灵敏、准确地检出卵巢癌术后复发和转移病灶，使分期更准确、更全面。     

直肠癌Miles术后局部复发的CT表现

目的：探讨CT在直肠癌行腹会阴联合直肠切除术后局部复发的早期诊断及其与术后肉芽肿、纤维化的鉴别。资料与方法：选择32例经随访、手术或穿刺证实直肠癌局部复发的CT表现进行分析，并与15例术后正常改变作比较。结果：32例局部复发病例表现：骶前和／或会阴部均见结节或肿块，除3例外，25例骶前肿块呈不对称性分布，增强后大部肿块有明显均匀或不均匀强化，肿块累及邻近肌肉、器官有23例，其他表现有骶骨侵犯、盆壁淋巴结肿大或有远处转移。15例术后无复发病例CT表现：12例见骶前斑片、索条状阴影，3例见软组织块影，左右对称或呈均匀分布，无会阴部肿块，无肌肉或邻近器官侵犯。结论：CT可以较早期检出直肠癌术后局部复发，以及与术后肉芽肿及纤维化的鉴别。     

食管癌术后复发和转移的螺旋CT表现特点

目的　探讨食管癌术后复发和转移的优势解剖分布及其螺旋CT表现特点。方法　回顾性分析 50例食管癌术后的螺旋CT资料,总结肿瘤复发和转移的类型、解剖部位及其复发时间分布特点,并进行统计分析。结果　50例中共有 31例复发和转移。31例中,消化道复发 12例,包括吻合口复发 8例,食管残端复发 1例,残胃复发 3例;淋巴结转移 28例,以 2R区(11例)和 7+8区(11例)多见,两区以上淋巴结转移为 13例,腹主动脉周围淋巴结群转移 5例,锁骨上窝淋巴结转移 3例;双肺转移 8例,肝脏转移 7例,胰腺转移 1例; 31例复发和转移病例中,胸腔积液 6例, 1例为双侧, 5例为单侧 (术侧 )。复发和转移以术后 3个月 ~1年内多见(Ρ<0. 005)。结论　食管癌术后复发以吻合口为主要部位;淋巴结转移为主要转移途径,增大淋巴结优势分布于气管右旁和气管隆突下淋巴结。复发和转移常发生在术后 3个月~1年内。螺旋CT对食管癌术后复发和转移的诊断具有较高的应用价值。     

18F-FDG PET/CT显像监测胃癌术后复发转移的价值

Objective PET with 18F-fluorodeoxyglucose (FDG) has been used to beth detect and stage a variety of malignancies. The aim of this retrospective study was to evaluate the clinical value of 18F-FDG PET/CT for recurrence and metastasis in gastric carcinoma patients after total gastrectomy. Methods A total of 45 gastric carcinoma patients who underwent total gastrectomy were included. PET/CT scans were obtained for restaging. The " gold standard" of 18F-FDG PET/CT diagnostic accuracy was based on either histopathology or clinical follow-up. By using the t-test from SPSS 11.5, the cut-off of maximum standard-ized uptake values (SUVmax) from 18F-FDG to differentiate benign from malignant lesion at stomach were determined and calculated. Results (1) Of the 45 patients, 22 were suspicion recurrent lesion at stomach. Of the 22 patients, 12 were confirmed to have recurrent lesions. The diagnostic accuracy were 100.0% (12/ 12) for sensitivity, 70.0% (7/10) for specificity, and 86.4% (19/22) for accuracy, respectively. A higher SUVmax in malignant than benign lesion was noted (6.27 ± 3.42 vs 3.92 ± 2.24), though not reached to the significance (t = 1. 862, P > 0.05). (2) For extra-gastric lesion detection, the sensitivity, specificity, and accuracy for region lymph nodes were 78.9% (15/19), 92.3% (24/26), and 86.7% (39/ 45), for peritoneal spreading were 6/9, 97.2% (35/36), 91. 1% (41/45), and for distant sites were 86.7%(13/15), 93.3% (28/30), 91.1% (41/45). (3) False positive were found in eight sites. All were either inflammatory or physiological uptake at intestine. False negative were found in nine sites. Either due to small in size (less than 1.0 cm in diameter), well differentiation of the tumor cell or with a nature of signet ring. Conclusion 18F-FDG PET/CT had a potential to detect local, regional, and distant metastasis in gastric cancer.     

18F-FDG PET/CT显像监测胃癌术后复发转移的价值

Objective PET with 18F-fluorodeoxyglucose (FDG) has been used to beth detect and stage a variety of malignancies. The aim of this retrospective study was to evaluate the clinical value of 18F-FDG PET/CT for recurrence and metastasis in gastric carcinoma patients after total gastrectomy. Methods A total of 45 gastric carcinoma patients who underwent total gastrectomy were included. PET/CT scans were obtained for restaging. The " gold standard" of 18F-FDG PET/CT diagnostic accuracy was based on either histopathology or clinical follow-up. By using the t-test from SPSS 11.5, the cut-off of maximum standard-ized uptake values (SUVmax) from 18F-FDG to differentiate benign from malignant lesion at stomach were determined and calculated. Results (1) Of the 45 patients, 22 were suspicion recurrent lesion at stomach. Of the 22 patients, 12 were confirmed to have recurrent lesions. The diagnostic accuracy were 100.0% (12/ 12) for sensitivity, 70.0% (7/10) for specificity, and 86.4% (19/22) for accuracy, respectively. A higher SUVmax in malignant than benign lesion was noted (6.27 ± 3.42 vs 3.92 ± 2.24), though not reached to the significance (t = 1. 862, P > 0.05). (2) For extra-gastric lesion detection, the sensitivity, specificity, and accuracy for region lymph nodes were 78.9% (15/19), 92.3% (24/26), and 86.7% (39/ 45), for peritoneal spreading were 6/9, 97.2% (35/36), 91. 1% (41/45), and for distant sites were 86.7%(13/15), 93.3% (28/30), 91.1% (41/45). (3) False positive were found in eight sites. All were either inflammatory or physiological uptake at intestine. False negative were found in nine sites. Either due to small in size (less than 1.0 cm in diameter), well differentiation of the tumor cell or with a nature of signet ring. Conclusion 18F-FDG PET/CT had a potential to detect local, regional, and distant metastasis in gastric cancer.     

18F-FDG PET/CT显像监测胃癌术后复发转移的价值

Objective PET with 18F-fluorodeoxyglucose (FDG) has been used to beth detect and stage a variety of malignancies. The aim of this retrospective study was to evaluate the clinical value of 18F-FDG PET/CT for recurrence and metastasis in gastric carcinoma patients after total gastrectomy. Methods A total of 45 gastric carcinoma patients who underwent total gastrectomy were included. PET/CT scans were obtained for restaging. The " gold standard" of 18F-FDG PET/CT diagnostic accuracy was based on either histopathology or clinical follow-up. By using the t-test from SPSS 11.5, the cut-off of maximum standard-ized uptake values (SUVmax) from 18F-FDG to differentiate benign from malignant lesion at stomach were determined and calculated. Results (1) Of the 45 patients, 22 were suspicion recurrent lesion at stomach. Of the 22 patients, 12 were confirmed to have recurrent lesions. The diagnostic accuracy were 100.0% (12/ 12) for sensitivity, 70.0% (7/10) for specificity, and 86.4% (19/22) for accuracy, respectively. A higher SUVmax in malignant than benign lesion was noted (6.27 ± 3.42 vs 3.92 ± 2.24), though not reached to the significance (t = 1. 862, P > 0.05). (2) For extra-gastric lesion detection, the sensitivity, specificity, and accuracy for region lymph nodes were 78.9% (15/19), 92.3% (24/26), and 86.7% (39/ 45), for peritoneal spreading were 6/9, 97.2% (35/36), 91. 1% (41/45), and for distant sites were 86.7%(13/15), 93.3% (28/30), 91.1% (41/45). (3) False positive were found in eight sites. All were either inflammatory or physiological uptake at intestine. False negative were found in nine sites. Either due to small in size (less than 1.0 cm in diameter), well differentiation of the tumor cell or with a nature of signet ring. Conclusion 18F-FDG PET/CT had a potential to detect local, regional, and distant metastasis in gastric cancer.     

18F-FDG PET/CT显像监测胃癌术后复发转移的价值

Objective PET with 18F-fluorodeoxyglucose (FDG) has been used to beth detect and stage a variety of malignancies. The aim of this retrospective study was to evaluate the clinical value of 18F-FDG PET/CT for recurrence and metastasis in gastric carcinoma patients after total gastrectomy. Methods A total of 45 gastric carcinoma patients who underwent total gastrectomy were included. PET/CT scans were obtained for restaging. The " gold standard" of 18F-FDG PET/CT diagnostic accuracy was based on either histopathology or clinical follow-up. By using the t-test from SPSS 11.5, the cut-off of maximum standard-ized uptake values (SUVmax) from 18F-FDG to differentiate benign from malignant lesion at stomach were determined and calculated. Results (1) Of the 45 patients, 22 were suspicion recurrent lesion at stomach. Of the 22 patients, 12 were confirmed to have recurrent lesions. The diagnostic accuracy were 100.0% (12/ 12) for sensitivity, 70.0% (7/10) for specificity, and 86.4% (19/22) for accuracy, respectively. A higher SUVmax in malignant than benign lesion was noted (6.27 ± 3.42 vs 3.92 ± 2.24), though not reached to the significance (t = 1. 862, P > 0.05). (2) For extra-gastric lesion detection, the sensitivity, specificity, and accuracy for region lymph nodes were 78.9% (15/19), 92.3% (24/26), and 86.7% (39/ 45), for peritoneal spreading were 6/9, 97.2% (35/36), 91. 1% (41/45), and for distant sites were 86.7%(13/15), 93.3% (28/30), 91.1% (41/45). (3) False positive were found in eight sites. All were either inflammatory or physiological uptake at intestine. False negative were found in nine sites. Either due to small in size (less than 1.0 cm in diameter), well differentiation of the tumor cell or with a nature of signet ring. Conclusion 18F-FDG PET/CT had a potential to detect local, regional, and distant metastasis in gastric cancer.     

18F-FDG PET/CT显像监测胃癌术后复发转移的价值

Objective PET with 18F-fluorodeoxyglucose (FDG) has been used to beth detect and stage a variety of malignancies. The aim of this retrospective study was to evaluate the clinical value of 18F-FDG PET/CT for recurrence and metastasis in gastric carcinoma patients after total gastrectomy. Methods A total of 45 gastric carcinoma patients who underwent total gastrectomy were included. PET/CT scans were obtained for restaging. The " gold standard" of 18F-FDG PET/CT diagnostic accuracy was based on either histopathology or clinical follow-up. By using the t-test from SPSS 11.5, the cut-off of maximum standard-ized uptake values (SUVmax) from 18F-FDG to differentiate benign from malignant lesion at stomach were determined and calculated. Results (1) Of the 45 patients, 22 were suspicion recurrent lesion at stomach. Of the 22 patients, 12 were confirmed to have recurrent lesions. The diagnostic accuracy were 100.0% (12/ 12) for sensitivity, 70.0% (7/10) for specificity, and 86.4% (19/22) for accuracy, respectively. A higher SUVmax in malignant than benign lesion was noted (6.27 ± 3.42 vs 3.92 ± 2.24), though not reached to the significance (t = 1. 862, P > 0.05). (2) For extra-gastric lesion detection, the sensitivity, specificity, and accuracy for region lymph nodes were 78.9% (15/19), 92.3% (24/26), and 86.7% (39/ 45), for peritoneal spreading were 6/9, 97.2% (35/36), 91. 1% (41/45), and for distant sites were 86.7%(13/15), 93.3% (28/30), 91.1% (41/45). (3) False positive were found in eight sites. All were either inflammatory or physiological uptake at intestine. False negative were found in nine sites. Either due to small in size (less than 1.0 cm in diameter), well differentiation of the tumor cell or with a nature of signet ring. Conclusion 18F-FDG PET/CT had a potential to detect local, regional, and distant metastasis in gastric cancer.     

18F-FDG PET/CT显像监测胃癌术后复发转移的价值

Objective PET with 18F-fluorodeoxyglucose (FDG) has been used to beth detect and stage a variety of malignancies. The aim of this retrospective study was to evaluate the clinical value of 18F-FDG PET/CT for recurrence and metastasis in gastric carcinoma patients after total gastrectomy. Methods A total of 45 gastric carcinoma patients who underwent total gastrectomy were included. PET/CT scans were obtained for restaging. The " gold standard" of 18F-FDG PET/CT diagnostic accuracy was based on either histopathology or clinical follow-up. By using the t-test from SPSS 11.5, the cut-off of maximum standard-ized uptake values (SUVmax) from 18F-FDG to differentiate benign from malignant lesion at stomach were determined and calculated. Results (1) Of the 45 patients, 22 were suspicion recurrent lesion at stomach. Of the 22 patients, 12 were confirmed to have recurrent lesions. The diagnostic accuracy were 100.0% (12/ 12) for sensitivity, 70.0% (7/10) for specificity, and 86.4% (19/22) for accuracy, respectively. A higher SUVmax in malignant than benign lesion was noted (6.27 ± 3.42 vs 3.92 ± 2.24), though not reached to the significance (t = 1. 862, P > 0.05). (2) For extra-gastric lesion detection, the sensitivity, specificity, and accuracy for region lymph nodes were 78.9% (15/19), 92.3% (24/26), and 86.7% (39/ 45), for peritoneal spreading were 6/9, 97.2% (35/36), 91. 1% (41/45), and for distant sites were 86.7%(13/15), 93.3% (28/30), 91.1% (41/45). (3) False positive were found in eight sites. All were either inflammatory or physiological uptake at intestine. False negative were found in nine sites. Either due to small in size (less than 1.0 cm in diameter), well differentiation of the tumor cell or with a nature of signet ring. Conclusion 18F-FDG PET/CT had a potential to detect local, regional, and distant metastasis in gastric cancer.     

18F-FDG PET/CT显像监测胃癌术后复发转移的价值

Objective PET with 18F-fluorodeoxyglucose (FDG) has been used to beth detect and stage a variety of malignancies. The aim of this retrospective study was to evaluate the clinical value of 18F-FDG PET/CT for recurrence and metastasis in gastric carcinoma patients after total gastrectomy. Methods A total of 45 gastric carcinoma patients who underwent total gastrectomy were included. PET/CT scans were obtained for restaging. The " gold standard" of 18F-FDG PET/CT diagnostic accuracy was based on either histopathology or clinical follow-up. By using the t-test from SPSS 11.5, the cut-off of maximum standard-ized uptake values (SUVmax) from 18F-FDG to differentiate benign from malignant lesion at stomach were determined and calculated. Results (1) Of the 45 patients, 22 were suspicion recurrent lesion at stomach. Of the 22 patients, 12 were confirmed to have recurrent lesions. The diagnostic accuracy were 100.0% (12/ 12) for sensitivity, 70.0% (7/10) for specificity, and 86.4% (19/22) for accuracy, respectively. A higher SUVmax in malignant than benign lesion was noted (6.27 ± 3.42 vs 3.92 ± 2.24), though not reached to the significance (t = 1. 862, P > 0.05). (2) For extra-gastric lesion detection, the sensitivity, specificity, and accuracy for region lymph nodes were 78.9% (15/19), 92.3% (24/26), and 86.7% (39/ 45), for peritoneal spreading were 6/9, 97.2% (35/36), 91. 1% (41/45), and for distant sites were 86.7%(13/15), 93.3% (28/30), 91.1% (41/45). (3) False positive were found in eight sites. All were either inflammatory or physiological uptake at intestine. False negative were found in nine sites. Either due to small in size (less than 1.0 cm in diameter), well differentiation of the tumor cell or with a nature of signet ring. Conclusion 18F-FDG PET/CT had a potential to detect local, regional, and distant metastasis in gastric cancer.     

18F-FDG PET/CT显像监测胃癌术后复发转移的价值

Objective PET with 18F-fluorodeoxyglucose (FDG) has been used to beth detect and stage a variety of malignancies. The aim of this retrospective study was to evaluate the clinical value of 18F-FDG PET/CT for recurrence and metastasis in gastric carcinoma patients after total gastrectomy. Methods A total of 45 gastric carcinoma patients who underwent total gastrectomy were included. PET/CT scans were obtained for restaging. The " gold standard" of 18F-FDG PET/CT diagnostic accuracy was based on either histopathology or clinical follow-up. By using the t-test from SPSS 11.5, the cut-off of maximum standard-ized uptake values (SUVmax) from 18F-FDG to differentiate benign from malignant lesion at stomach were determined and calculated. Results (1) Of the 45 patients, 22 were suspicion recurrent lesion at stomach. Of the 22 patients, 12 were confirmed to have recurrent lesions. The diagnostic accuracy were 100.0% (12/ 12) for sensitivity, 70.0% (7/10) for specificity, and 86.4% (19/22) for accuracy, respectively. A higher SUVmax in malignant than benign lesion was noted (6.27 ± 3.42 vs 3.92 ± 2.24), though not reached to the significance (t = 1. 862, P > 0.05). (2) For extra-gastric lesion detection, the sensitivity, specificity, and accuracy for region lymph nodes were 78.9% (15/19), 92.3% (24/26), and 86.7% (39/ 45), for peritoneal spreading were 6/9, 97.2% (35/36), 91. 1% (41/45), and for distant sites were 86.7%(13/15), 93.3% (28/30), 91.1% (41/45). (3) False positive were found in eight sites. All were either inflammatory or physiological uptake at intestine. False negative were found in nine sites. Either due to small in size (less than 1.0 cm in diameter), well differentiation of the tumor cell or with a nature of signet ring. Conclusion 18F-FDG PET/CT had a potential to detect local, regional, and distant metastasis in gastric cancer.     

18F-FDG PET/CT显像监测胃癌术后复发转移的价值

Objective PET with 18F-fluorodeoxyglucose (FDG) has been used to beth detect and stage a variety of malignancies. The aim of this retrospective study was to evaluate the clinical value of 18F-FDG PET/CT for recurrence and metastasis in gastric carcinoma patients after total gastrectomy. Methods A total of 45 gastric carcinoma patients who underwent total gastrectomy were included. PET/CT scans were obtained for restaging. The " gold standard" of 18F-FDG PET/CT diagnostic accuracy was based on either histopathology or clinical follow-up. By using the t-test from SPSS 11.5, the cut-off of maximum standard-ized uptake values (SUVmax) from 18F-FDG to differentiate benign from malignant lesion at stomach were determined and calculated. Results (1) Of the 45 patients, 22 were suspicion recurrent lesion at stomach. Of the 22 patients, 12 were confirmed to have recurrent lesions. The diagnostic accuracy were 100.0% (12/ 12) for sensitivity, 70.0% (7/10) for specificity, and 86.4% (19/22) for accuracy, respectively. A higher SUVmax in malignant than benign lesion was noted (6.27 ± 3.42 vs 3.92 ± 2.24), though not reached to the significance (t = 1. 862, P > 0.05). (2) For extra-gastric lesion detection, the sensitivity, specificity, and accuracy for region lymph nodes were 78.9% (15/19), 92.3% (24/26), and 86.7% (39/ 45), for peritoneal spreading were 6/9, 97.2% (35/36), 91. 1% (41/45), and for distant sites were 86.7%(13/15), 93.3% (28/30), 91.1% (41/45). (3) False positive were found in eight sites. All were either inflammatory or physiological uptake at intestine. False negative were found in nine sites. Either due to small in size (less than 1.0 cm in diameter), well differentiation of the tumor cell or with a nature of signet ring. Conclusion 18F-FDG PET/CT had a potential to detect local, regional, and distant metastasis in gastric cancer.     

18F-FDG PET/CT显像监测胃癌术后复发转移的价值

Objective PET with 18F-fluorodeoxyglucose (FDG) has been used to beth detect and stage a variety of malignancies. The aim of this retrospective study was to evaluate the clinical value of 18F-FDG PET/CT for recurrence and metastasis in gastric carcinoma patients after total gastrectomy. Methods A total of 45 gastric carcinoma patients who underwent total gastrectomy were included. PET/CT scans were obtained for restaging. The " gold standard" of 18F-FDG PET/CT diagnostic accuracy was based on either histopathology or clinical follow-up. By using the t-test from SPSS 11.5, the cut-off of maximum standard-ized uptake values (SUVmax) from 18F-FDG to differentiate benign from malignant lesion at stomach were determined and calculated. Results (1) Of the 45 patients, 22 were suspicion recurrent lesion at stomach. Of the 22 patients, 12 were confirmed to have recurrent lesions. The diagnostic accuracy were 100.0% (12/ 12) for sensitivity, 70.0% (7/10) for specificity, and 86.4% (19/22) for accuracy, respectively. A higher SUVmax in malignant than benign lesion was noted (6.27 ± 3.42 vs 3.92 ± 2.24), though not reached to the significance (t = 1. 862, P > 0.05). (2) For extra-gastric lesion detection, the sensitivity, specificity, and accuracy for region lymph nodes were 78.9% (15/19), 92.3% (24/26), and 86.7% (39/ 45), for peritoneal spreading were 6/9, 97.2% (35/36), 91. 1% (41/45), and for distant sites were 86.7%(13/15), 93.3% (28/30), 91.1% (41/45). (3) False positive were found in eight sites. All were either inflammatory or physiological uptake at intestine. False negative were found in nine sites. Either due to small in size (less than 1.0 cm in diameter), well differentiation of the tumor cell or with a nature of signet ring. Conclusion 18F-FDG PET/CT had a potential to detect local, regional, and distant metastasis in gastric cancer.     

CT纹理分析对于术前预测直肠癌淋巴结转移的初步研究

目的 探讨基于增强CT的纹理分析对于术前预测直肠癌淋巴结转移的应用价值.方法 回顾性分析93例经术后病理证实的直肠癌患者静脉期CT图像,进行肿块全层感兴趣区(ROI)的勾画,并提取纹理特征.通过LASSO回归进行特征降维,构建影像组学评分公式.采用独立样本t检验或卡方检验对淋巴结转移组及非转移组的一般临床特征、常规CT...     

CT纹理分析联合临床病理信息预测进展期胃癌术后复发的价值

目的:探讨CT纹理分析联合临床病理信息在预测进展期胃癌术后复发中的价值.方法:回顾性搜集经手术病理确诊的胃癌患者162例,随机分为训练集(n=100)及验证集(n=62).从术前静脉期CT图像中提取纹理特征,先对训练集和验证集特征进行U检验及组间相关系数检验,得到一致性较好的特征(n=48),再采用LASSO回归方法筛...     

直肠癌CT诊断的价值分析

目的:通过直肠癌CT表现,分析其诊断及检查的价值。方法:回顾性分析经手术及肠镜病理证实的115例直肠癌病人的CT征象。结果:直肠癌多表现为肠壁局限性增厚、不规则的软组织肿块,肠腔变形、狭窄,邻近组织受侵则界限不清;CT检查的敏感性为93%,术后局部复发的准确率为80%。结论:CT检查能为直肠癌中晚期病人术前分期提供重要依据,对临床制定恰当的治疗方案价值较大,且为术后监测的重要手段,它的最大价值是显示直肠癌在腔内外生长的形态大小、侵犯范围及转移。     

^18F-FDG PET／CT显像监测胃癌术后复发转移的价值

目的评价^18F-脱氧葡萄糖（FDG）PET／CT监测胃癌术后复发及转移的临床价值。方法回顾性分析胃癌术后临床疑复发或转移而行^18F-FDG PET／CT检查的45例患者临床资料,根据细胞学、病理或随访结果分析PET／CT检查结果,计算残胃及转移灶最大标准摄取值（SUVmax）。采用SPSS11．5软件进行数据处理,SUVmax两样本均数比较采用t检验。结果（1）45例中22例临床疑残胃复发,12例患者最终确定残胃复发,^18F-FDG PET／CT诊断残胃复发的灵敏度、特异性及准确性分别为100．0％（12／12）、70．0％（7／10）和86．4％（19／22）,12例复发病灶SUVmax为6．27±3．42（其中2例低分化腺癌的SUVmax较低,分别为2．5和3．3）,另10例无复发的残胃SUVmax为3．92±2．24（其中3例吻合口炎性病灶局部SUVmax较高,分别为8．3,5．2和6．3）,差异无统计学意义（t=1．862,P〉0．05）。（2）对残胃以外转移灶的检出：PET／CT灵敏度、特异性、准确性在区域淋巴结转移中分别为78．9％（15／19）、92．3％（24／26）和86．7％（39／45）,在腹膜转移中分别为6／9、97．2％（35／36）和91．1％（41／45）,在远处转移中分别为86．7％（13／15）、93．3％（28／30）和91．1％（41／45）。（3）PET／CT假阳性8处为炎性或肠管摄取,假阴性9处多为直径〈1．0cm的转移灶和低分化腺癌及印戒细胞癌的转移灶。结论^18F-FDG PET／CT虽然检测胃癌术后区域淋巴结和腹膜转移的灵敏度较低,但仍是监测其术后复发转移的有效手段。     

术前增强CT影像组学预测肝癌术后早期复发的价值

目的:探讨基于术前双期增强CT的影像组学分析结合支持向量机(SVM)方法对肝细胞癌(HCC)术后早期复发的预测价值.方法:回顾性分析经病理证实且术前行上腹部CT增强扫描的130例HCC患者的临床及影像资料.对所有患者在术后进行定期随访,术后2年内有复发或转移者61例(早期复发组),无早期复发者69例.对2组患者的临床资...     

鼻咽癌放疗后局部复发与纤维化的同层动态CT增强研究

目的：探讨螺旋CT动态增强扫描在鉴别鼻咽癌放疗后局部复发与纤维化中的应用价值。方法：选择鼻咽癌放疗后复发病人35例，纤维化者40例，行同层动态CT增强研究，绘制其时间．密度曲线。结果：鼻咽癌放疗后复发与纤维化的动态增强特点明显不同。结论：螺旋CT动态增强扫描有助于鉴别鼻咽癌放疗后复发与纤维化。