Ronald J Jaszczak

US Patent:

6629469, Oct 7, 2003

Filed:

Jun 5, 2001

Appl. No.:

09/874582

Inventors:

Ronald J. Jaszczak - Chapel Hill NC
Paul Douglas Kirven - Durham NC
Timothy Warren Perry - Hillsborough NC

Assignee:

Data Spectrum Corporation - Hillsborough NC

International Classification:

G01M 1900

US Classification:

738664

Abstract:

A cardiac phantom is provided for simulating a dynamic cardiac ventricle. The phantom comprises two concentrically-disposed, fluid-tight, flexible membranes defining a closed space between the walls of the membranes. A pump is operatively connected to the inner membrane for reciprocally delivering a volume of fluid to the inner membrane to inflate and deflate both membranes in simulating systole and diastole of a heart. A medium is disposed within the closed space defined between the walls of the membranes for maintaining a uniform distance between the walls of the membranes during inflation and deflation. The phantom is provided for evaluation of medical imaging systems. A method, computer system and a computer-readable medium are also provided for controlling the phantom.

US Patent:

6843145, Jan 18, 2005

Filed:

Mar 14, 2003

Appl. No.:

10/389481

Inventors:

Ronald J. Jaszczak - Chapel Hill NC, US
Paul Douglas Kirven - Durham NC, US
Timothy Warren Perry - Hillsborough NC, US

Assignee:

Data Spectrum Corporation - Hillsborough NC

International Classification:

G01M 1900
G09B 2328
A61B 505

US Classification:

738664, 434268, 434272, 600416

Abstract:

A cardiac phantom is provided for simulating a dynamic cardiac ventricle. The phantom comprises two concentrically-disposed, fluid-tight, flexible membranes defining a closed space between the walls of the membranes. A pump is operatively connected to the inner membrane for reciprocally delivering a volume of fluid to the inner membrane to inflate and deflate both membranes in simulating systole and diastole of a heart. A medium is disposed within the closed space defined between the walls of the membranes for maintaining a uniform distance between the walls of the membranes during inflation and deflation. The phantom is provided for evaluation of medical imaging systems. A method, computer system and a computer-readable medium are also provided for controlling the phantom.

US Patent:

20030220718, Nov 27, 2003

Filed:

Mar 14, 2003

Appl. No.:

10/388719

Inventors:

Ronald Jaszczak - Chapel Hill NC, US
Paul Kirven - Durham NC, US
Timothy Perry - Hillsborough NC, US

International Classification:

G05D007/06
A61B019/00

US Classification:

700/282000, 073/866400

Abstract:

A cardiac phantom is provided for simulating a dynamic cardiac ventricle. The phantom comprises two concentrically-disposed, fluid-tight, flexible membranes defining a closed space between the walls of the membranes. A pump is operatively connected to the inner membrane for reciprocally delivering a volume of fluid to the inner membrane to inflate and deflate both membranes in simulating systole and diastole of a heart. A medium is disposed within the closed space defined between the walls of the membranes for maintaining a uniform distance between the walls of the membranes during inflation and deflation. The phantom is provided for evaluation of medical imaging systems. A method, computer system and a computer-readable medium are also provided for controlling the phantom.

US Patent:

44993757, Feb 12, 1985

Filed:

May 10, 1982

Appl. No.:

6/376775

Inventors:

Ronald J. Jaszczak - Chapel Hill NC

International Classification:

G01D 1800
G12B 1300

US Classification:

2502521

Abstract:

A phantom for testing nuclear imaging instruments, such as are used in nuclear medicine, includes a hollow, cylindrical case with a removable carrier. The carrier contains several sets of straight, parallel rods which are of uniform cross section throughout and which have equal orthogonal dimensions in a plane perpendicular to rod alignment. The rods are arranged in an array with uniform spacing therebetween in each set. Several spheres are mounted on posts which screw into the base of the case so that the spheres are oriented in a plane perpendicular to the rod alignment. A pair of capillary tubes are secured to closure caps which are threadably engageable in access openings in the top of the case. The capillary tubes are insertable into circular, laterally stabilizing wells in the bottom of the case.

US Patent:

52890082, Feb 22, 1994

Filed:

Jun 10, 1992

Appl. No.:

7/896395

Inventors:

Ronald J. Jaszczak - Chapel Hill NC
David R. Gilland - Chapel Hill NC

Assignee:

Duke University - Durham NC

International Classification:

G01T 1166

US Classification:

25036303

Abstract:

Disclosed is a method and apparatus for single photon emission computed tomography of a test region having a plurality of projectional views utilizing a radiation source opposite said test region from a radiation detector, comprising detecting emission radiation from a first projectional view of a test region, irradiating the test region to transmit radiation through the test region, and detecting both emission and transmission radiation from the first projectional view of the test region. The emission detection, irradiation and emission and transmission steps are then repeated for a second projectional view. This emission and transmission data may then be used to produce compensated emission data for the test region.