Paul R Domigan

6992295, Jan 31, 2006

Oct 27, 2003

10/695264

Leonid Romanov - Boxboro MA, US
Paul Domigan - Andover MA, US
Olof Johnson - Ashburnham MA, US

PhotoDetection Systems, Inc. - Acton MA

G01T 1/164

25036303, 25036301, 250361 R, 2503362, 2503361

A PET scanner includes a scintillator block and a plurality of photodetectors, each of which has a field of view that includes a portion of the scintillator block. An optical element is disposed between the scintillator block and the plurality of photodetectors. The optical element has a first layer and a second layer. The first layer has a central region and a peripheral region separated by a first gap. The second layer has at least a first region and a second region separated by a second gap.

20110315884, Dec 29, 2011

Aug 20, 2009

12/737879

William A. Worstell - Wayland MA, US
Paul Domigan - Andover MA, US
Olof Johnson - Ashburnham MA, US

G01T 1/164
G01T 1/20

250362, 25036303

A nuclear imaging system including a PET scanner having a bore sized no larger than necessary to accommodate a human head; and a wheel-mounted scanner gantry for supporting the PET scanner, the wheel-mounted scanner gantry having a width small enough to fit through a standard doorway.

57291411, Mar 17, 1998

Mar 19, 1996

8/616492

Mathew Arnold Hass - Andover MA
Paul Domigan - Andover MA

Intermagnetics General Corporation - Latham NY

G01V 300

324318

In a magnetic resonance imaging system, wherein a subject to be imaged is supported within a bore of a magnet assembly and exposed to radio frequency (RF) energy emitted from an excitation coil, gradient coils and an RF screen are disposed within the region of the bore exteriorly to an excitation coil and are configured with a split or open region facing sections of the excitation coil for reduced image currents in the gradient coils and the RF screen from RF field generated by the excitation coil. The X gradient coil is reduced to two enlarged coil sections to the left and to the right of the bore. The two opposed sections of the X gradient coil, the two opposed sections of the Y gradient coil, and the opposed pairs of sections of the Z gradient coil are spaced apart at the top and the bottom of the bore for reduced interaction with the excitation coil section located at the top and the bottom of the bore. Thereby, the space between the excitation coil and the shield can be reduced. A more accurate image is developed with greater efficiency in terms of electric power.

59399643, Aug 17, 1999

Sep 9, 1997

8/926183

Paul Domigan - Andover MA

Intermagnetics General Corporation - Latham NY

H01F 702
H01J 2308

335306

A magnetic array for periodic magnetic devices is formed as a series of pole modules each constructed from rectangular components. Field strengths in excess of 2. 0 T are achieved by surrounding each pole module on all available sides with magnet blocks. Less magnet material is used than in prior modules that produced equal field strengths and magnet material is more efficiently used by reducing the material scrap associated with manufacture of prior art pole and magnet designs.

56592507, Aug 19, 1997

Mar 19, 1996

8/616488

Paul Domigan - Andover MA
Mathew Arnold Hass - Andover MA
Robert Gluckstern - Rockville MD

Intermagnetics General Corporation - Latham NY

G01V 300

324320

A permanent magnet assembly having a central elliptical bore, suitable for reception of a patient in an MRI system, is formed of a plurality of elliptically shaped sections disposed along an axis of the bore. Each section is subdivided into a plurality of segments in which each segment is constructed of bricks of magnetic material. Each brick has the shape of a right parallel piped. In any one of the segments, all of the bricks are arranged parallel to a common plane which is parallel to the bore axis. The bricks are magnetized with magnetization vector oriented in a common direction perpendicular to the plane. Full bricks are employed throughout all of the segments with the exception of a plurality of bricks along a surface of the bore wherein truncation of one or more of the bricks may be required to attain a desired homogeneity to a dipole magnetic field within the field. Directions of magnetization of the various segments vary in a symmetrical pattern about the bore to attain the desired field within the bore while minimizing any magnetic field outside of the assembly. This reduces overall weight of the assembly, and reduces the manufacturing cost.