@article {269,
	title = {Distortion-free magnetic resonance imaging in the zero-field limit},
	journal = {Journal of Magnetic Resonance},
	volume = {200},
	year = {2009},
	note = {J Magn Reson526AWTimes Cited:6Cited References Count:29},
	month = {Oct},
	pages = {285-290},
	abstract = {<p>MRI is a powerful technique for clinical diagnosis and materials characterization. Images are acquired in a homogeneous static magnetic field much higher than the fields generated across the field of view by the spatially encoding field gradients. Without such a high field, the concomitant components of the field gradient dictated by Maxwell\&$\#$39;s equations lead to severe distortions that make imaging impossible with conventional MRI encoding. In this paper, we present a distortion-free image of a phantom acquired with a fundamentally different methodology in which the applied static field approaches zero. Our technique involves encoding with pulses of uniform and gradient field, and acquiring the magnetic field signals with a SQUID. The method can be extended to weak ambient fields, potentially enabling imaging in the Earth\&$\#$39;s field without cancellation coils or shielding. Other potential applications include quantum information processing and fundamental studies of long-range ferromagnetic interactions. (C) 2009 Elsevier Inc. All rights reserved.</p>
},
	keywords = {gradients},
	isbn = {1090-7807},
	doi = {Doi 10.1016/J.Jmr.2009.07.016},
	url = {<Go to ISI>://WOS:000272260900015},
	author = {Kelso, N. and Lee, S. K. and Bouchard, L. S. and Demas, V. and M{\"u}ck, M. and Pines, A. and Clarke, J.}
}
