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First published online May 17, 2007
British Journal of Radiology (2007) 80, 524-531
© 2007 British Institute of Radiology
doi: 10.1259/bjr/33156643
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Improved focal liver lesion detection: comparison of single-shot diffusion-weighted echoplanar and single-shot T2 weighted turbo spin echo techniques

K Coenegrachts, MD 1 J Delanote, MD 1 L Ter Beek, PhD 2 M Haspeslagh, RN 3 S Bipat, MSc 4 J Stoker, MD, PhD 4 F Van Kerkhove, MD 1 L Steyaert, MD 1 H Rigauts, MD 1 and J W Casselman, MD, PhD 1

1 Department of Radiology, AZ St-Jan AV, Bruges, Belgium, 2 Philips Medical Systems, Best, The Netherlands, 3 Hospital Administration and Statistics, AZ St-Jan AV, Bruges, Belgium, 4 Department of Radiology, Academic Medical Centre, Amsterdam, The Netherlands


Figure 1
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  		Figure 1. Comparison of(a) overall image quality, (b) lesion conspicuity for all lesions (biliary cysts, haemangiomas and metastases), (c) lesion conspicuity for each type of lesion (biliary cysts, haemangiomas or metastases) and (d) comparison of lesion conspicuity for each type of lesion (biliary cysts, haemangiomas or metastases) <10 mm.

 

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  		Figure 2. On T2W SS TSE(axial plane; a) and SS SE-EPI DWI with b = 0 s mm–2 (axial plane; b), the attention is drawn to two small hyperintense nodules (white arrow and white arrowhead). These hyperintensities are hard to differentiate from the surrounding intrahepatic vessels. When evaluating the SS SE-EPI DWI images (mainly b = 20 s mm–2 (axial plane; c) and b = 300 s mm–2 (axial plane; d)), these nodules are clearly displayed as hyperintense nodules, contrasting with the surrounding intrahepatic vessels, which show a strong signal intensity decrease. On the SS SE-EPI DWI image with b = 800 s mm–2 (axial plane; e), a low signal-to-noise ratio hampers the evaluation of the liver. Hepatic segmentectomy confirmed the presence of two small liver metastases in this hepatic region.

 

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  		Figure 3. Comparison of image artefacts.

 




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