Abstract
Nuclear magnetic resonance is expected to replace CAT scan as a leading diagnostic tool because of its non invasive nature. The magnet generating the static field is a major part of the cost because of the high level of field homogeneity required for imaging, Two or three further magnetic sources generate a gradient field. I propose replacing these sources with an array of adjustable magnetic sources and I provide a preliminary numerical method of determining adjustments so that static field inhomogeneities will be removed at the same time as the gradient field is inserted, This reduces cost by relaxing the homogeneity requirements for the large static field magnet. Field measurements across the image plane are used as input to the computer inversion algorithm. The magnetic moments required to compensate the inhomogeneities and add the gradient field are computed. I show for a simple configuration that the accuracy of the field is a function of the number of elements in the magnetic array.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
