Interactive three-point localization of double-oblique sections using MR fluoroscopy

Magnetic resonance imaging allows significant freedom in selecting the orie ntation and position of a tomographic section. However, it can nonetheless be challenging to determine quickly and efficiently the correct parameters required to image a targeted anatomic structure that may lie at an oblique angle in the imaging volume. We describe a three-point tool in which a) the user interactively selects three points from an anatomic structure of inte rest during live MR fluoroscopy; b) adjustments to pulse sequence are calcu lated to image the tomographic section defined by the three points; and c) the section is then immediately imaged fluoroscopically. The tool allows qu ick localization of, for example, longitudinal images of specific arterial structures. (C) 1999 Wiley-Liss, Inc.