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

S Yamamoto, MD 1 H Takano, MD 1 K Motoori, MD 1 T Ueda, MD 1 M Ikeda, MD 1 S Kimura, MD 2 T Uno, MD 1 S Yasuda, MD 1 H Ito, MD 1 R Hara, MD 1 and K Isobe, MD 1

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



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Figure 1. Nasopharyngeal carcinoma in a 62-year-old male before radiation therapy. Transverse MR images of the nasopharynx. Tumour has spread on the posterior wall of the nasopharynx. There is a high intensity area on fast short time inversion recovery (FSTIR) images (a) and an enhanced area on fat suppression, contrast enhanced T1 weighted (FSCE T1W) images (b).

 


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Figure 2. Nasopharyngeal carcinoma in a 40-year-old female before radiation therapy. Transverse MR images of the nasopharyx show a soft tissue mass on the right nasopharynx. Tumour extends into the anterior vertebral muscle. There is a high intensity area on fast short time inversion recovery (FSTIR) images (a) and an enhanced area on fat suppression, contrast enhanced T1 weighted (FSCE T1W) images (b).

 


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Figure 3. Composite receiver operating characteristic curves from pooled data from the four reviewers for each sequence. FSCE T1WI, fat suppression, contrast enhanced T1 weighted imaging; FSTIR, fast short time inversion recovery. Az, area under curve.

 


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Figure 4. Nasopharyngeal carcinoma in a 52-year-old male just after radiation therapy, needle biopsy having shown no residual tumour. Transverse MR images of the nasopharynx. Mucosa of the left lateral wall shows a high intensity area (long arrow) on fast short time inversion recovery (FSTIR) images (a) and an enhanced area (short arrow) on fat suppression, contrast enhanced T1 weighted (FSCE T1W) images (b).

 





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