Diagnostic performance of 64-MDCT and 1.5-T MRI with high-resolution sequences in the T staging of gastric cancer: a comparative analysis with histopathology

被引:36
作者
Anzidei, M. [1 ]
Napoli, A. [1 ]
Zaccagna, F. [1 ]
Di Paolo, P. [1 ]
Zini, C. [1 ]
Marincola, B. Cavallo [1 ]
Geiger, D. [1 ]
机构
[1] Univ Roma La Sapienza, Sch Med, Dept Radiol Sci, I-00161 Rome, Italy
来源
RADIOLOGIA MEDICA | 2009年 / 114卷 / 07期
关键词
CT; MR; Stomach; Carcinoma; MULTIDETECTOR ROW CT; ENDOSCOPIC ULTRASONOGRAPHY; SURGICAL OUTCOMES; RECTAL-CANCER; IN-VITRO; CARCINOMA; MDCT; RECONSTRUCTION; CHEMOTHERAPY; SENSITIVITY;
D O I
10.1007/s11547-009-0455-x
中图分类号
R8 [特种医学]; R445 [影像诊断学];
学科分类号
1002 ; 100207 ; 1009 ;
摘要
Purpose. This study was undertaken to compare the accuracy of magnetic resonance (MR) imaging and 64-slice multidetector computed tomography (64-MDCT) in the T staging of gastric carcinoma in comparison with histopathology. Materials and methods. Forty patients with an endoscopic diagnosis of gastric carcinoma underwent preoperative MR imaging and 64-MDCT, both of which were performed after i.v. injection of scopolamine and water distension of the stomach. In the MR imaging protocol, we acquired T2-weighted turbo spin-echo (TSE) sequences, true fast imaging steady-state free precession (true-FISP) and gadolinium-enhanced T1-weighted volumetric interpolated breath-hold examination (VIBE) 3D sequences. Contrast-enhanced CT scans were obtained in the arterial and venous phases. Two groups of radiologists independently reviewed the MR and 64-MDCT images. The results were compared with pathology findings. Results. In the evaluation of T stage, 64-MDCT had 82.5% and MR imaging had 80% sensitivity. Accuracy of MR imaging was slightly higher than that of 64-MDCT in identifying T1 lesions (50% vs 37.5%), whereas the accuracy of 64-MDCT was higher in differentiating T2 lesions (81.2% vs 68.7%). The accuracy of MR imaging and 64-MDCT did not differ significantly in the evaluation of T3-T4 lesions (p>0.05). Understaging was observed in 20% of cases with MR imaging and in 17.5% with 64-MDCT. Conclusions. MR imaging and 64-MDCT accuracy levels did not differ in advanced stages of disease, whereas MR imaging was superior in identifying early stages of gastric cancer and can be considered a valid alternative to MDCT in clinical practice.
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页码:1065 / 1079
页数:15
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