Optimization of the efficiency of information collection in medical imaging requires simultaneous consideration of a number of factors, of which some are obvious, others subtle. The factors taken singly seem to have little significance, whereas in concert they often lead to possibilities of more than an order of magnitude improvement in imaging efficiency, i.e., signal-to-noise ratio (SNR) squared per unit exposure or per unit exposure time. The purpose of this note is to point out one of the more subtle points related to CT and NMR information collection efficiency that must be considered when the concert is replayed using NMR themes.
Keywords: signal-to-noise ratio, reconstruction, ideal observer, CT, NMR
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