Noise in MRI.
This study analyzes the signal-to-noise ratio (SNR) in magnetic resonance imaging. The factors that determine the SNR are derived starting from basic principles. The SNR, for a given object, is shown to be proportional to the voxel volume and the square root of the acquisition time. The noise generated by the body is derived using a cylindrical model and is shown to be proportional to the square of the radius and the square root of the length.
Macovski
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Department of Electrical Engineering, Stanford University 94305, USA.
D006801:Humans; D008279:Magnetic Resonance Imaging; D012815:Signal Processing, Computer-Assisted