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
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Anzidei, M.
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Univ Roma La Sapienza, Sch Med, Dept Radiol Sci, I-00161 Rome, ItalyUniv Roma La Sapienza, Sch Med, Dept Radiol Sci, I-00161 Rome, Italy
Anzidei, M.
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Napoli, A.
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Univ Roma La Sapienza, Sch Med, Dept Radiol Sci, I-00161 Rome, ItalyUniv Roma La Sapienza, Sch Med, Dept Radiol Sci, I-00161 Rome, Italy
Napoli, A.
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Zaccagna, F.
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Univ Roma La Sapienza, Sch Med, Dept Radiol Sci, I-00161 Rome, ItalyUniv Roma La Sapienza, Sch Med, Dept Radiol Sci, I-00161 Rome, Italy
Zaccagna, F.
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Di Paolo, P.
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Univ Roma La Sapienza, Sch Med, Dept Radiol Sci, I-00161 Rome, ItalyUniv Roma La Sapienza, Sch Med, Dept Radiol Sci, I-00161 Rome, Italy
Di Paolo, P.
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Zini, C.
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Univ Roma La Sapienza, Sch Med, Dept Radiol Sci, I-00161 Rome, ItalyUniv Roma La Sapienza, Sch Med, Dept Radiol Sci, I-00161 Rome, Italy
Zini, C.
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Marincola, B. Cavallo
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Univ Roma La Sapienza, Sch Med, Dept Radiol Sci, I-00161 Rome, ItalyUniv Roma La Sapienza, Sch Med, Dept Radiol Sci, I-00161 Rome, Italy
Marincola, B. Cavallo
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Geiger, D.
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Univ Roma La Sapienza, Sch Med, Dept Radiol Sci, I-00161 Rome, ItalyUniv Roma La Sapienza, Sch Med, Dept Radiol Sci, I-00161 Rome, Italy
Geiger, D.
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[1] Univ Roma La Sapienza, Sch Med, Dept Radiol Sci, I-00161 Rome, Italy
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.