Sachin S Junnarkar

7126126, Oct 24, 2006

Oct 16, 2003

10/687797

David J. Schyler - Bellport NY, US
Paul O'Connor - Bellport NY, US
Craig Woody - Setauket NY, US
Sachin Shrirang Junnarkar - Sound Beach NY, US
Veljko Radeka - Bellport NY, US
Paul Vaska - Sound Beach NY, US
Jean-Francois Pratte - Stony Brook NY, US
Nora Volkow - Chevy Chase MD, US

Brookhaven Science Associates, LLC - Upton NY

G01T 1/164

25036303, 600407, 600436

A method of serially transferring annihilation information in a compact positron emission tomography (PET) scanner includes generating a time signal for an event, generating an address signal representing a detecting channel, generating a detector channel signal including the time and address signals, and generating a composite signal including the channel signal and similarly generated signals. The composite signal includes events from detectors in a block and is serially output. An apparatus that serially transfers annihilation information from a block includes time signal generators for detectors in a block and an address and channel signal generator. The PET scanner includes a ring tomograph that mounts onto a portion of an animal, which includes opposing block pairs. Each of the blocks in a block pair includes a scintillator layer, detection array, front-end array, and a serial encoder. The serial encoder includes time signal generators and an address signal and channel signal generator.

20050167599, Aug 4, 2005

Oct 16, 2003

10/688577

David Schlyer - Bellport NY, US
Paul O'Connor - Bellport NY, US
Craig Woody - Setauket NY, US
Sachin Junnarkar - Sound Beach NY, US
Veljko Radeka - Bellport NY, US
Paul Vaska - Sound Beach NY, US
Jean-Francois Pratte - Stony Brook NY, US

G01T001/164

250363030

A method of serially transferring annihilation information in a compact positron emission tomography (PET) scanner includes generating a time signal representing a time-of-occurrence of an annihilation event, generating an address signal representing a channel detecting the annihilation event, and generating a channel signal including the time and address signals. The method also includes generating a composite signal including the channel signal and another similarly generated channel signal concerning another annihilation event. An apparatus that serially transfers annihilation information includes a time signal generator, address signal generator, channel signal generator, and composite signal generator. The time signal is asynchronous and the address signal is synchronous to a clock signal. A PET scanner includes a scintillation array, detection array, front-end array, and a serial encoder. The serial encoders include the time signal generator, address signal generator, channel signal generator, and composite signal generator.

20140021354, Jan 23, 2014

Jul 18, 2012

13/552155

Daniel GAGNON - Twinsburgh OH, US
Sachin S. Junnarkar - Mundelein IL, US

Toshiba Medical Systems Corporation - Otawara-shi
Kabushiki Kaisha Toshiba - Minato-ku

G01T 1/202

250362, 250366

An apparatus and method for channel count reduction in solid-state-based positron emission tomography that multiplexes read-outs from photo-detectors using a sum delay circuit, including a sum channel and a delay-sum channel. The sum channel sums signals from sensors in an array and is digitized to extract the timing and energy information. A delay-sum channel includes a discrete delay line that introduces a known delay after each sensor, creating a time signature for the sensor, followed by a summing circuit that adds the delayed signals. The delay-sum channel is digitized using a high speed counters to extract location information. Start and Stop signals for the counter are derived when the sum channel output and the delay-sum channel output cross a pulse ID threshold, respectively. The pulse ID threshold is chosen to minimize the Compton scatter and not clip the photo-peak events.