Eric C Reid

US Patent:

51967960, Mar 23, 1993

Filed:

Aug 6, 1991

Appl. No.:

7/740920

Inventors:

George J. Misic - Novelty OH
Eric D. Reid - Turtle Creek PA

Assignee:

Medrad, Inc. - Pittsburgh PA

International Classification:

G01R 3320

US Classification:

324322

Abstract:

A quadrature surface probe comprising two individual mirror image coil loops arranged so that the magnetic field vectors of the respective coil loops are substantially perpendicular. An area of overlap between the first and second coil loops is adjusted to minimize the mutual coupling between the individual coils. Also disclosed is the method of manufacturing the quadrature surface probe.

US Patent:

55215068, May 28, 1996

Filed:

Nov 19, 1993

Appl. No.:

8/154414

Inventors:

George Misic - Novelty OH
Eric Reid - Monroeville PA

Assignee:

Medrad, Inc. - Pittsburgh PA

International Classification:

G01V 300
G01V 314

US Classification:

324322

Abstract:

An NMR magnetic coil system (10) is disclosed wherein the isolation between the coils (16, 18) can be adjusted to decrease or virtually eliminate the coupling between quadrature magnetic resonance imaging coils (16, 18). At least one of the coils (16) is separated into parallel segments (20, 22), located in a critically overlapped area. The capacitance of the segments is adjusted by a differential capacitor (76) to vary the ratio of the RF current flowing through the parallel segments. Appropriate adjustment of the capacitance of these paths (20, 22) causes a sharing of the appropriate amount of the out of phase flux to cancel the balance of the shared flux and therefore results in a net mutual inductance of zero.

US Patent:

52587177, Nov 2, 1993

Filed:

Aug 9, 1991

Appl. No.:

7/743489

Inventors:

George J. Misic - Novelty OH
Eric D. Reid - Turtle Creek PA

Assignee:

Medrad, Inc. - Pittsburgh PA

International Classification:

G01R 3320

US Classification:

324318

Abstract:

A magnetic resonance imaging receiving coil having an improved signal-to-noise ratio comprising two or more separate quadrature volume coils, each intercepting the two quadrature components of the magnetic resonance signal within its own sensitive volume, and the two or more quadrature coils being magnetically isolated from each other by overlap geometry along the axis normal to the plane of the magnetic resonance rotating field. The coils are connected to independent image processing channels of a data acquisition system, the outputs of the processing channels being combined to form an overall image.

US Patent:

55171206, May 14, 1996

Filed:

Nov 24, 1993

Appl. No.:

8/158052

Inventors:

George J. Misic - Novelty OH
William J. Monski - Pittsburgh PA
Eric Reid - Monroeville PA

Assignee:

Medrad, Inc. - Pittsburgh PA

International Classification:

G01V 300
A61B 5055

US Classification:

324318

Abstract:

A quadrature coil with a unique arrangement of vertical and horizonal mode coils allows for superior magnetic resonance imaging and spectroscopy through higher sensitivity and more uniform imaging over the region from the head to the crest of the aortic arch. The coil has vertical-mode conductors at approximately 30. degree. , 150. degree. , 210. degree. and 330. degree. with respect to a longitudinal axis, and horizontal-mode conductors at 90. degree. and 270. degree. The horizontal-mode conductors are connected at the far end of the coil at an electrical midpoint of the horizontal-mode conductors, such that a voltage null will exist there when the coil is operated in vertical mode. The vertical and horizontal mode feedpoints are located at a head end of the coil, which is hinged into halves to permit easy access by and to a patient.