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First published online December 17, 2008, 10.2967/jnumed.108.056408
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The Effectiveness of 18F-FDG PET/CT Combined with STIR MRI for Diagnosing Nodal Involvement in the Thorax

Miwa Morikawa1, Yoshiki Demura1, Takeshi Ishizaki1, Shingo Ameshima1, Isamu Miyamori2, Masato Sasaki3, Tatsuro Tsuchida4, Hirohiko Kimura4, Yasuhisa Fujibayashi5 and Hidehiko Okazawa5

1 Department of Respiratory Medicine, University of Fukui, Fukui, Japan; 2 Third Department of Internal Medicine, University of Fukui, Fukui, Japan; 3 Department of Thoracic Surgery, University of Fukui, Fukui, Japan; 4 Department of Radiology, University of Fukui, Fukui, Japan; and 5 Biomedical Imaging Research Center, University of Fukui, Fukui, Japan


Figure 1
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  		FIGURE 1.  A 60-y-old man with lung adenocarcinoma and metastasis in mediastinal lymph node 3 in pretracheal area. 18F-FDG PET (A) and integrated 18F-FDG PET/CT (B) show strong accumulation in primary tumor in right upper lobe and mediastinal lymph nodes (maximal SUV of 11.4 in lymph node 3), and STIR MRI (C) shows lymph node 3 and primary tumor as high-signal-intensity areas. LPR of this lymph node was 0.33, and rated visual score was 4.

 

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  		FIGURE 2.  A 63-y-old man with malignant lymphoma. 18F-FDG PET (A) and integrated 18F-FDG PET/CT (B) show strong accumulation in pretracheal and bilateral axillary lymph nodes (maximal SUVs of 10.9–13.6), and STIR MRI (C) shows lymph nodes as high-signal-intensity areas. LPRs were 0.11, and rated visual score was 4 for each node.

 

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  		FIGURE 3.  A 36-y-old man with sarcoidosis. 18F-FDG PET (A) and integrated 18F-FDG PET/CT (B) show strong accumulation in pretracheal and paraaortic lymph nodes (maximal SUVs of 5.3–6.0), and STIR MRI (C) shows lymph nodes as low-signal-intensity areas. LPRs were 0.06, and rated visual score was 2 or 3 for each node.

 




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