3D fluoroscopy with real-time 3D non-cartesian phased-array contrast-enhanced MRA

✍ Scribed by Ethan Brodsky; David Isaacs; Thomas M. Grist; Walter F. Block

• Publisher: John Wiley and Sons
• Year: 2006
• Tongue: English
• Weight: 315 KB
• Volume: 56
• Category: Article
• ISSN: 0740-3194
• DOI: 10.1002/mrm.20957

✦ Synopsis

Abstract

For optimized CE‐MRA of the chest and abdomen, the scan time and breath‐hold must be coordinated with the arrival of contrast. A 3D fluoroscopy system is demonstrated that performs real‐time 3D projection reconstruction acquisition, reconstruction, and visualization using only the standard scanner hardware and operator console workstation. Unlike 2D fluorotriggering techniques, no specification of a monitoring slab or careful placement of the imaging volume is required. 3DPR data are acquired continuously throughout the examination using an eight‐channel receiver and 1 s interleaved subframes. The data are reconstructed using 1 s segments for real‐time monitoring with 0.8‐cm isotropic spatial resolution over the entire torso, allowing full‐volume axial, coronal, and sagittal MIPs to be displayed simultaneously with minimal latency. The system later uses the same scan data to generate high‐spatial‐resolution time‐resolved sequences of the breath‐hold interval. The 3D fluoroscopy system was validated on phantoms and human volunteers. Magn Reson Med, 2006. © 2006 Wiley‐Liss, Inc.