A 24-ch phased-array system for hyperpolarized helium gas parallel MRI to evaluate lung functions

被引：11

作者：

Lee, Ray F. ^{[1
]}

Johnson, Glyn ^{[1
]}

Stoeckel, Bernd ^{[1
]}

Stefanescu, Cornel ^{[1
]}

Trampel, Robert ^{[1
]}

McGuinness, Georgeann ^{[1
]}

机构：

[1] NYU, Med Ctr, New York, NY 10016 USA

来源：

2005 27TH ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY, VOLS 1-7 | 2005年

关键词：

D O I：

10.1109/IEMBS.2005.1615410

中图分类号：

R318 [生物医学工程];

学科分类号：

0831 ;

摘要：

Hyperpolarized 3 He gas MRI has a serious potential for assessing pulmonary functions. Due to the fact that the non-equilibrium of the gas results in a steady depletion of the signal level over the course of the excitations, the signal-to-noise ratio (SNR) can be independent of the number of the data acquisitions under certain circumstances. This provides a unique opportunity for parallel MRI for gaining both temporal and spatial resolution without reducing SNR. We have built a 24-channel receive / 2-channel transmit phased array system for 3 He parallel imaging. Our in vivo experimental results proved that the significant temporal and spatial resolution can be gained at no cost to the SNR. With 3D data acquisition, eight fold (2x4) scan time reduction can be achieved without any aliasing in images. Additionally, a rigid analysis using the low impedance preamplifier for decoupling presented evidence of strong coupling.

引用

页码：4278 / 4281

页数：4