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The Effect of Patient Age on Contrast Enhancement During CT of the Pancreatobiliary Region

Shigeki Itoh1, Mitsuru Ikeda1, Hiroko Satake2, Toyohiro Ota2 and Takeo Ishigaki2

1 Department of Technical Radiology, Nagoya University School of Health Sciences, Daikou-minami 1-1-20, Higashi-ku, Nagoya 461-8673, Japan.
2 Department of Radiology, Nagoya University Graduate School of Medicine, Nagoya 466-8550, Japan.


Figure 1
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  		Fig. 1A —Visual grades for pancreatic phase images. All images are displayed at window width of 345 H and window level of 45 H. 63-year-old man with bile duct carcinoma. Contrast enhancement of pancreatic parenchyma is too intense to be evaluated in detail at these settings.

 

Figure 2
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  		Fig. 1B —Visual grades for pancreatic phase images. All images are displayed at window width of 345 H and window level of 45 H. 65-year-old man with gallbladder carcinoma. Visual grade was excellent (contrast enhancement provided optimal information for making radiologic diagnosis).

 

Figure 3
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  		Fig. 1C —Visual grades for pancreatic phase images. All images are displayed at window width of 345 H and window level of 45 H. 60-year-old man with adenomyomatosis of gallbladder. Visual grade was good (contrast enhancement provided adequate information for making a radiologic diagnosis).

 

Figure 4
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  		Fig. 2 —Histogram for time of start of arterial phase scanning in groups 2 (black bars) and 3 (gray bars).

 

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