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Detection of Hepatocellular Carcinoma: Comparison of Dynamic MR Imaging with Dynamic Double Arterial Phase Helical CT

Yumi Noguchi1, Takamichi Murakami, Tonsok Kim, Masatoshi Hori, Keigo Osuga, Syuji Kawata, Seishi Kumano, Atsuya Okada, Takashi Sugiura and Hironobu Nakamura

1 All authors: Department of Radiology, Osaka University Graduate School of Medicine, 2-2 Yamadaoka, Suita, Osaka 5650871, Japan.



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  		Fig. 1A. —49-year-old woman with one hepatocellular carcinoma nodule that was 10 mm in diameter on anterior segment. Arterial phase image of dynamic MR imaging shows hyperenhancing tumor (arrow) (assigned confidence level of 3 or 4).

 


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  		Fig. 1B. —49-year-old woman with one hepatocellular carcinoma nodule that was 10 mm in diameter on anterior segment. Early arterial phase image of dynamic helical CT missed hyperenhancing tumor (no level assigned or assigned confidence level of 1 or 2).

 


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  		Fig. 1C. —49-year-old woman with one hepatocellular carcinoma nodule that was 10 mm in diameter on anterior segment. Late arterial phase image of dynamic CT also missed hyperenhancing tumor (no level assigned or assigned confidence level of 1 or 2).

 


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  		Fig. 2A. —37-year-old man with two hepatocellular carcinoma lesions that were 35 mm in diameter on medial segment and 15 mm on right posterior segment. Arterial phase image of dynamic MR imaging shows markedly enhanced tumor in medial segment.

 


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  		Fig. 2B. —37-year-old man with two hepatocellular carcinoma lesions that were 35 mm in diameter on medial segment and 15 mm on right posterior segment. Portal venous phase image of dynamic MR imaging shows washout of contrast medium of tumor.

 


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  		Fig. 2C. —37-year-old man with two hepatocellular carcinoma lesions that were 35 mm in diameter on medial segment and 15 mm on right posterior segment. Early arterial phase image of dynamic helical CT shows markedly enhanced tumor on medial segment.

 


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  		Fig. 2D. —37-year-old man with two hepatocellular carcinoma lesions that were 35 mm in diameter on medial segment and 15 mm on right posterior segment. Late arterial phase image of dynamic helical CT shows markedly enhanced tumor on medial segment and also shows hyperenhanced tumor (arrow) on right posterior segment (assigned confidence level of 3 or 4), which was missed on dynamic MR imaging (no level assigned or assigned confidence level of 1).

 

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