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DOI:10.2214/AJR.07.3116
AJR 2008; 190:691-695
© American Roentgen Ray Society

Technical Innovation

Real-Time Temporal Maximum-Intensity-Projection Imaging of Hepatic Lesions with Contrast-Enhanced Sonography

Stephanie R. Wilson1,2, Hyun-Jung Jang1, Tae Kyoung Kim1, Hiroko Iijima1,3, Naohisa Kamiyama4 and Peter N. Burns5

1 Department of Medical Imaging, Toronto General Hospital, University of Toronto, Toronto, Ontario, Canada.
2 Present address: Diagnostic Imaging, Foothills Medical Centre, 1403 29 St. NW, Calgary, Alberta T2R 1M5, Canada.
3 Present address: Department of Medicine, Hyogo University, Hyogo, Japan.
4 Toshiba Medical Systems, Tokyo, Japan.
5 Departments of Medical Biophysics and Medical Imaging, University of Toronto, and Imaging Research, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada.

OBJECTIVE. We sought to perform a preliminary evaluation of temporal maximum intensity projection (MIP) of focal hepatic masses in selected patients. The technique processes real-time contrast-enhanced sonography images by integrating the path of moving bubbles to depict vascular morphology. Following a high-intensity ultrasound pulse that disrupts bubbles within the scan plane, MIP images the trajectories of fresh bubbles replenishing the plane and revealing their course.

CONCLUSION. Vascular morphology is depicted at a level or detail not seen before with sonography. High-frame-rate sequences of less than one second uniquely show arterial structure in liver lesions.

Keywords: contrast agents • liver tumors • maximum intensity projection • microflow imaging • sonography


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Copyright © 2008 by the American Roentgen Ray Society.