Zhang Tao, Grafendorfer Thomas, Cheng Joseph Y, Ning Peigang, Rainey Bob, Giancola Mark, Ortman Sarah, Robb Fraser J, Calderon Paul D, Hargreaves Brian A, Lustig Michael, Scott Greig C, Pauly John M, Vasanawala Shreyas S
Department of Radiology, Stanford University, Stanford, California, USA.
Department of Electrical Engineering, Stanford University, Stanford, California, USA.
Magn Reson Med. 2016 Sep;76(3):1015-21. doi: 10.1002/mrm.25999. Epub 2015 Sep 29.
To design, construct, and validate a semiflexible 64-channel receive-only phased array for pediatric body MRI at 3T.
A 64-channel receive-only phased array was developed and constructed. The designed flexible coil can easily conform to different patient sizes with nonoverlapping coil elements in the transverse plane. It can cover a field of view of up to 44 × 28 cm(2) and removes the need for coil repositioning for body MRI patients with multiple clinical concerns. The 64-channel coil was compared with a 32-channel standard coil for signal-to-noise ratio and parallel imaging performances on different phantoms. With IRB approval and informed consent/assent, the designed coil was validated on 21 consecutive pediatric patients.
The pediatric coil provided higher signal-to-noise ratio than the standard coil on different phantoms, with the averaged signal-to-noise ratio gain at least 23% over a depth of 7 cm along the cross-section of phantoms. It also achieved better parallel imaging performance under moderate acceleration factors. Good image quality (average score 4.6 out of 5) was achieved using the developed pediatric coil in the clinical studies.
A 64-channel semiflexible receive-only phased array has been developed and validated to facilitate high quality pediatric body MRI at 3T. Magn Reson Med 76:1015-1021, 2016. © 2015 Wiley Periodicals, Inc.
设计、构建并验证一款用于3T小儿体部MRI的半柔性64通道接收相控阵。
开发并构建了一款64通道接收相控阵。所设计的柔性线圈能够轻松贴合不同体型的患者，其线圈单元在横断面上互不重叠。它可覆盖高达44×28 cm²的视野，对于有多种临床需求的体部MRI患者无需重新定位线圈。将该64通道线圈与一款32通道标准线圈在不同体模上进行信噪比及并行成像性能比较。经机构审查委员会（IRB）批准并获得知情同意/同意书后，在连续21例儿科患者身上对所设计的线圈进行验证。
在不同体模上，儿科线圈的信噪比高于标准线圈，沿体模横断面在7 cm深度范围内平均信噪比增益至少为23%。在中等加速因子下，它还实现了更好的并行成像性能。在临床研究中，使用所开发的儿科线圈获得了良好的图像质量（平均评分4.6分，满分5分）。
已开发并验证了一款64通道半柔性接收相控阵，以助力3T下高质量的小儿体部MRI检查。《磁共振医学》76:1015 - 1021, 2016. © 2015威利期刊公司。
