Michael T Petrillo

US Patent:

6376841, Apr 23, 2002

Filed:

Jun 30, 1999

Appl. No.:

09/343938

Inventors:

Michael J. Petrillo - Pleasanton CA
Robert A. Adam - San Jose CA

Assignee:

Philips Electronics N.A. Corp. - New York NY

International Classification:

G01T 1164

US Classification:

25036303

Abstract:

An apparatus and method for reducing the non-uniformity of a positron emission tomography (âPETâ) image is described. The event detector system comprises a detector having a plurality of zones, each zone comprising a plurality of detector devices. The event detector system also comprises a threshold circuit coupled to a detector device of the detector. Additionally, the event detector system comprises a summation circuit coupled to the threshold circuit.

US Patent:

6403960, Jun 11, 2002

Filed:

Apr 29, 1999

Appl. No.:

09/302161

Inventors:

Donald R. Wellnitz - Pleasanton CA
Michael J. Petrillo - Pleasanton CA
Lingxiong Shao - San Jose CA

Assignee:

Koninklijijke Philips Electronics N.V. - Eindhoven

International Classification:

G01T 1164

US Classification:

25036309, 250369

Abstract:

A nuclear medicine imaging system includes the capability to correct for the deadtime, including the capability to correct for spatial variations in deadtime across the imaging surface of a detector. The imaging system includes one or more radiation detectors, each using a large, monolithic scintillation crystal. Each detector has deadtime associated with it. A given detector is used to acquire an energy profile of a patient based on emission radiation. The detector includes a number of timing channels. The energy profile is used to select a zone influence map indicating the extent of spatial overlap in response between the various timing channels. Emission data of the patient is then acquired during an emission scan. During acquisition of the emission data, a rate meter assigned to each timing channel samples the number of counts associated with each timing channel to acquire deadtime data. A unique deadtime function is provided for each unique zone represented in the zone influence map, including each region of overlap.

US Patent:

7030387, Apr 18, 2006

Filed:

Oct 18, 2002

Appl. No.:

10/274190

Inventors:

Oleg Serebryanov - San Jose CA, US
Michael Petrillo - Pleasanton CA, US
Sorin Cora - Anaheim CA, US

Assignee:

Koninklijke Philips Electronics N.V. - Eindhoven

International Classification:

G01T 1/24
G01N 23/00

US Classification:

25037015, 378 19

Abstract:

A nuclear camera system () includes a gantry () disposed about an examination region () having detector heads ( ) mounted to the gantry. The detector heads () include an enclosure () defining a volume (). A plurality of solid state detectors () are arranged in an array () within the enclosure volume. A first cold plate () is in thermally conductive contact with the plurality of solid state detectors. A first Peltier cooler () is in thermally conductive contact with the first cold plate, the first Peltier cooler provides for cooling the plurality of detectors in the array. A second cold plate () is located within the enclosure and is thermally insulated from first cold plate. A second Peltier cooler () is in thermally conductive contact with the second cold plate, the second Peltier cooler for removing moisture from the volume (). A heat sink () is in thermally conductive contact with the first and second Peltier coolers. A sensor () is in operative relationship with the detector head.

US Patent:

7453066, Nov 18, 2008

Filed:

Jan 5, 2004

Appl. No.:

10/541562

Inventors:

Michael J. Petrillo - Pleasanton CA, US
Kim H. Hansen - Bagsvaerd, DK
Thomas Karpati - San Francisco CA, US

Assignee:

Koninklijke Philips Electronics N.V. - Eindhoven

International Classification:

G01T 1/20

US Classification:

25037011

Abstract:

Gamma radiation events are received individually at elements of a detector array () at least one of the elements (P) being defective. Each detector element converts incident radiation into a radiation event signal which is digitized by an analog-to-digital converter () into a coordinate position (x,y) on the detector array and energy (z). An event generator () generates radiation event signals for each defective element based on radiation events received at contributing elements, e. g. , nearest neighbor elements (P-P). In a preferred embodiment, the contribution from each of the contributing elements is randomized by passing a token () among positions of a table () corresponding to each of the contributing elements. Each time a radiation event is received at the contributing element whose corresponding table position holds the token, that event also generates an event signal for the defective element and the token is passed (). The energy of the generated event for the defective detector element is randomized (), such as by replacing the least significant bits with random numbers.

US Patent:

7558439, Jul 7, 2009

Filed:

Jul 8, 2003

Appl. No.:

10/520988

Inventors:

Jürgen Weese - Aachen, DE
Peter Roesch - Aachen, DE
Angela Jane Da Silva - Danville CA, US
Michael J. Petrillo - Pleasanton CA, US

Assignee:

Koninklijke Philips Electronics N.V. - Eindhoven

International Classification:

G06K 9/32
A61B 5/05

US Classification:

382294, 600427

Abstract:

method A first image of a moving object is acquired by of a first imaging method, e. g by PET or SPECT imaging. The first image contains artifacts caused by object motion. From two further images acquired by a second imaging method, e. g. C. T. or M. R. , and representing the object in respective states of motion, a motion model is formed. The information contents of either the first image or a combination image, formed from the first image and the two further images, and the motion model is enhanced.

US Patent:

7649178, Jan 19, 2010

Filed:

Aug 2, 2005

Appl. No.:

11/573560

Inventors:

Michael J. Petrillo - Pleasanton CA, US
Sorin V. Cora - Anaheim CA, US
John F. Vesel - Kirtland OH, US
Sanyi Tseng - San Jose CA, US
Jinghan Ye - Fremont CA, US

Assignee:

Koninklijke Philips Electronics N.V. - Eindhoven

International Classification:

G01T 1/24

US Classification:

25037009

Abstract:

A radiation detector package includes a radiation-sensitive solid-state element () having a first electrode () and a pixelated second electrode () disposed on opposite principal surfaces of the solid-state element. An electronics board () receives an electrical signal from the solid-state element responsive to radiation incident upon the radiation-sensitive solid-state element. A light-tight shield (′) shields at least the radiation-sensitive solid-state element from light exposure and compresses an insulating elastomer and metal element connector () between the pixilated electrode () and contact pads () on the electronics board.

US Patent:

7945012, May 17, 2011

Filed:

Jul 24, 2007

Appl. No.:

12/377302

Inventors:

Jinghan Ye - Fremont CA, US
John F. Vesel - Kirtland OH, US
Michael J. Petrillo - Pleasanton CA, US

Assignee:

Koninklijke Philips Electronics N.V. - Eindhoven

International Classification:

G01N 23/00

US Classification:

378 11, 378 14

Abstract:

A computed tomography acquisition geometry provides an increased field of view (). A radiation source () such as an x-ray source and a radiation detector () are displaced from the imaging center (). In one implementation, the central ray () of a radiation beam () is parallel to the plane of the detector () at the detector midpoint (), but is displaced from the imaging center.

US Patent:

8269176, Sep 18, 2012

Filed:

Oct 31, 2007

Appl. No.:

12/514593

Inventors:

Raymond C. D'Ambrosio - Fremont CA, US
Ronald J. Asjes - Valkenswaard, NL
Hugo Bertelsen - Aalborg, DK
George De Fockert - Apeldoorn, NL
Michael J. Petrillo - Pleasanton CA, US
Alexey Korzuchin - Dublin CA, US
Steven Rubio - San Jose CA, US
Scott D. Heavner - Alameda CA, US
Pierre L. Patino - Aptos CA, US
Adrianus P. Rommers - Veldhoven, NL

Assignee:

Koninklijke Philips Electronics N.V. - Eindhoven

International Classification:

G21K 1/02
G01T 1/20

US Classification:

250361R, 250367, 2503631

Abstract:

A gamma camera () includes at least one radiation detector head (). At least one such radiation detector head () includes a plurality of capacitive elements () disposed over at least a radiation sensitive portion () of the radiation detector head. A proximity sensor monitor () is coupled with the plurality of capacitive elements to detect proximity of a subject to the radiation detector head based on a measured electrical characteristic of the capacitive elements. A collision sensor monitor () is coupled with the plurality of capacitive elements to detect conductive electric current flowing between spaced apart parallel conductive plates () of the capacitive element responsive to mechanical deformation of the spacing between the plates.