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British Journal of Radiology 74 (2001),805-810 © 2001 The British Institute of Radiology

Full paper

Detection of nasopharyngeal carcinoma: fast short time inversion recovery images compared with fat suppression, contrast enhanced T1 weighted spin echo images

S Yamamoto, MD1, H Takano, MD1, K Motoori, MD1, T Ueda, MD1, M Ikeda, MD1, S Kimura, MD2, T Uno, MD1, S Yasuda, MD1, H Ito, MD1, R Hara, MD1 and K Isobe, MD1

1Department of Radiology, Chiba University, 1-8-1 Inohana, Chuou-ku, Chiba City, Chiba 260-8670 and 2Department of Radiology, Inoue Memorial Hospital, 1-16 Shindencho, Chuou-ku, Chiba City, Japan

The aim was to compare fast short time inversion recovery (FSTIR) images and fat suppression, contrast enhanced T1 weighted (FSCE T1W) spin echo images in the diagnosis of nasopharyngeal carcinoma (NPC). 102 MR studies were obtained with a 1.0 T or a 1.5 T system in 28 patients with NPC. The MR studies comprised both FSTIR and FSCE T1W images. FSTIR and FSCE T1W images were compared for detection of NPC by means of a receiver operating characteristic (ROC) analysis. The areas under the ROC curves of FSTIR and FSCE T1W images showed no statistical difference (0.87 vs 0.87). There was also no statistical difference in the sensitivity, specificity and accuracy of each sequence (0.74 vs 0.77, 0.81 vs 0.77 and 0.79 vs 0.77, respectively). Both sequences had the same performance for detection of NPC. FSTIR is as useful as FSCE T1W images, especially in the detection of recurrent tumours, but without the cost of contrast medium.




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