Electricity: measuring and testing – Particle precession resonance – Using a nuclear resonance spectrometer system
Patent
1995-06-02
1996-04-30
Tokar, Michael
Electricity: measuring and testing
Particle precession resonance
Using a nuclear resonance spectrometer system
1286531, 324307, G01R 3348
Patent
active
055128270
ABSTRACT:
A newly acquired MR image of an imaging subject is displayed on a display device. An operator interactively manipulates the imaging plane during imaging, by using a button, a rocker switch, a knob, and a trackball. The button enables or disables interactive scan-plane control. The rocker switch chooses between "translate", and "rotate" modes. In "translate" mode, the knob pushes the imaging plane deeper or shallower relative to the most recently displayed image, while the trackball slides the plane sideways and/or up and down. In "rotate" mode, the knob spins the imaging plane about the center of the most recently displayed image without changing the tilt of the plane, while the trackball tumbles or tilts the imaging plane. Colored icons displayed over the image change location, size, and/or shape to indicate the direction and extent of the translation or rotation. When motion of the knob or trackball ceases, or an acquire image button is pressed, the icon reassumes its default size, shape, and location, and the location and orientation information is transformed and provided to a pulse sequencer of a magnetic resonance (MR) imaging system. The pulse sequencer controls an RF transmitter and gradient amplifiers to cause an MR image of the subject at an imaging plane to be acquired. The new imaging-plane location is then used for all subsequent images, until another change is made.
REFERENCES:
patent: 5038783 (1991-08-01), Dumoulin
patent: 5365927 (1994-11-01), Roemer et al.
patent: 5431161 (1995-07-01), Ryals et al.
U.S. patent application (concurrently filed case) "Screen-Based Interactive Imaging Plane Prescription for MRI" by C. J. Hardy, R. D. Darrow.
U.S. patent application "Oblique MR Image Controlled from a 3D Workstation Model" by H. E. Cline et al., Ser. No. 08/203,079, filed Feb. 28, 1994.
Darrow Robert D.
Hardy Christopher J.
General Electric Company
Tokar Michael
Zale Lawrence P.
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