Vessel enhancement filtering in magnetic resonance angiography

Details Vessel enhancement filtering in magnetic resonance angiography Vessel enhancement filtering in magnetic resonance angiography

1994-08-05

1997-07-01

Couso, Jose L.

Image analysis

Applications

Biomedical applications

382108, 382130, 324308, 324309, 324312, 128696, 1286533, 128713, G06K 900

Patent

active

056446462

ABSTRACT:
An MRI system includes an MR cylinder, a radio frequency (RF) coil (or antenna), preliminary processing circuitry, and a computer processing system. The RF receiver produces an electrical signal to the preliminary processing circuitry representative of the sensed magnetic field. The preliminary processing circuitry provides a measurement data signal S (which is in the frequency domain) to the computer processing system, which includes a computer processor and a memory. The computer processor stores measurement data signal S as a data matrix M.sub.2 in a larger data matrix M.sub.3 that contains zero values in memory locations surrounding data matrix M.sub.2. This is referred to as zero-padding. The computer processor performs (zero-padded) Fourier transformation on data matrix M.sub.3 to produce an interpolated image data matrix I.sub.D. Interpolated image data matrix I.sub.D is processed through enhancement filtering to provide an enhanced image data matrix I.sub.E that has improved visibility of vessels. The filtering may be performed by a variety of filters including a max-min SD filter or a cross-section filter.

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