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4556848 Point sensitive NMR imaging system using a magnetic field configuration with a spatial minimum
New Patents
signal pick-up arranged in its gap, an amplifier, a selector and an analog-to-digital converter, which are connected to the output of said pickup, a video-pulse generator connected to the input thereof, and a radio-pulse generator. The analyzer also comprises an automatic sample weighing unit composed of such seriesconnected components as a weight-to-frequency converter, a load-receiving platform thereof being inserted in the nuclear magnetic resonance pick-up, and a frequency-to-code converter, a data swapping unit, a processor, a control unit, a programming unit and a data output unit.
4556848 POINT SENSITIVE NMR IMAGING SYSTEM USING A MAGNETIC FIELD CONFIGURATION WITH A SPATIAL MINIMUM
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A point-sensitive NMR imaging system (10) in which a main solenoid coil (I 1) produces a relatively strong and substantially uniform magnetic field and a pair of perturbing coils (PZl and PZ2) powered by current in the same direction superimposes a pair of relatively weak perturbing fields on the main field to produce a resultant point of minimum field strength at a desired location in a direction along the Z-axis. Two other pairs of perturbing coils (PXl, PX2; PY 1, PY2) superimpose relatively weak field gradients on the main field in directions along the X- and Y-axes to locate the minimum field point at a desired location in a plane normal to the Z-axes. An RF generator (22) irradiates a tissue specimen in the field with radio frequency energy so that desired nuclei in a small volume at the point of minimum field strength will resonate.
Philippe H Eberhard assigned to The United States of America as represented by the United States Department of Energy
For information about PATSEARCH’ Pergamon InfoLine Inc. 1340 Old Chain Bridge Road McLean, Virginia 22101 USA Telephone (703) 442-0900 Telex: 90-181 I
Pergamon InfoLine Limited 12 Vandy Street London EC2A 2DE England Telephone (01) 377-4650 Telex: 8814614
Pergamon Press Canada Ltd 150 Consumers Road, Suite 104 Willowdale, Ontario Canada M2J 1P9 Telephone (416) 497-8337
signal pick-up arranged in its gap, an amplifier, a selector and an analog-to-digital converter, which are connected to the output of said pickup, a video-pulse generator connected to the input thereof, and a radio-pulse generator. The analyzer also comprises an automatic sample weighing unit composed of such seriesconnected components as a weight-to-frequency converter, a load-receiving platform thereof being inserted in the nuclear magnetic resonance pick-up, and a frequency-to-code converter, a data swapping unit, a processor, a control unit, a programming unit and a data output unit.
4556848 POINT SENSITIVE NMR IMAGING SYSTEM USING A MAGNETIC FIELD CONFIGURATION WITH A SPATIAL MINIMUM
111
A point-sensitive NMR imaging system (10) in which a main solenoid coil (I 1) produces a relatively strong and substantially uniform magnetic field and a pair of perturbing coils (PZl and PZ2) powered by current in the same direction superimposes a pair of relatively weak perturbing fields on the main field to produce a resultant point of minimum field strength at a desired location in a direction along the Z-axis. Two other pairs of perturbing coils (PXl, PX2; PY 1, PY2) superimpose relatively weak field gradients on the main field in directions along the X- and Y-axes to locate the minimum field point at a desired location in a plane normal to the Z-axes. An RF generator (22) irradiates a tissue specimen in the field with radio frequency energy so that desired nuclei in a small volume at the point of minimum field strength will resonate.
Philippe H Eberhard assigned to The United States of America as represented by the United States Department of Energy
For information about PATSEARCH’ Pergamon InfoLine Inc. 1340 Old Chain Bridge Road McLean, Virginia 22101 USA Telephone (703) 442-0900 Telex: 90-181 I
Pergamon InfoLine Limited 12 Vandy Street London EC2A 2DE England Telephone (01) 377-4650 Telex: 8814614
Pergamon Press Canada Ltd 150 Consumers Road, Suite 104 Willowdale, Ontario Canada M2J 1P9 Telephone (416) 497-8337