Physiological phantom standard for NMR imaging and spectroscopy

Details Physiological phantom standard for NMR imaging and spectroscopy Physiological phantom standard for NMR imaging and spectroscopy

1988-11-28

1989-12-19

Noland, Tom

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

324300, G01R 3320

Patent

active

048885550

ABSTRACT:
A physiological phantom standard for NMR imaging and spectroscopy is provided for testing the entire range of image quality parameters over a region comparable to the physiological sample in size, NMR parameters, and RF conductivity. Included in these tests are: signal-to-noise, contrast-to-noise, geometric distortion, slice thickness, slice position, slice profile, slice flatness, T1 and T2 relaxation times, nucleii density, three dimensional spatial resolution, image uniformity, flip-angle accuracy, resonance frequency stabiltity, and positioning system alignment. NMR active materials fills substantially all of the enclosed volume of the phantom to more closely simulate conditions imposed by the anticipated object under test, such as a human subject. The phantom includes a set of coordinate system grids and an associated set of slice parameter grids. The phantom further provides a plurality of chambers which may enclose selectably different NMR active material. The present invention also includes a plurality of resolution scales located at various points throughout the phantom. Each element of the phantom used to provide the various image quality and system performance tests is substantially surrounded by NMR active and RF conductive material to simulate the environment of anticipated tissue to be tested. All tests can be performed substantially over the volume of the phantom without moving or reconfiguring the phantom.

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