Mark W Lenox

US Patent:

7579598, Aug 25, 2009

Filed:

Jun 6, 2007

Appl. No.:

11/759163

Inventors:

Mark W. Lenox - Harriman TN, US
Blake Atkins - Maryville TN, US
Danny F Newport - Knoxville TN, US
Aaron McFarland - Knoxville TN, US
Stefan Siegel - Knoxville TN, US

Assignee:

Siemens Medical Solutions USA, Inc. - Malvern PA

International Classification:

G01T 1/164

US Classification:

25036303

Abstract:

A PET event position calculation method using a combination angular and radial event map wherein identification of the radial distance of the event from the centroid of the scintillation crystal with which the event is associated as well as angular information is performed. The radial distance can be converted to a statistical confidence interval, which information can be used in downstream processing. More sophisticated reconstruction algorithms can use the confidence interval information selectively, to generate higher fidelity images with higher confidence information, and to improve statistics in dynamic imaging with lower confidence information.

US Patent:

7827129, Nov 2, 2010

Filed:

May 18, 2007

Appl. No.:

11/750554

Inventors:

Dongming Hu - Knoxville TN, US
Blake Atkins - Maryville TN, US
Mark W. Lenox - Harriman TN, US

Assignee:

Siemens Medical Solutions USA, Inc. - Malvern PA

International Classification:

G06N 3/08

US Classification:

706 25, 706 15, 706 16, 706 26, 382128, 382131, 382155, 382156, 382157, 382158, 382159

Abstract:

A crystal lookup table used to define a matching relationship between a signal position of a detected event in a PET scanner and a corresponding detector pixel location is generated using a neural network-based algorithm, and is implemented by a FPGA.

US Patent:

8089043, Jan 3, 2012

Filed:

Dec 1, 2009

Appl. No.:

12/628259

Inventors:

Michael E. Casey - Louisville TN, US
Mu Chen - Knoxville TN, US
Timothy G. Gremillion - Knoxville TN, US
Mark W. Lenox - Harriman TN, US
Vladimir Y. Panin - Knoxville TN, US

Assignee:

Siemens Medical Solutions USA, Inc. - Malvern PA

International Classification:

G01D 18/00

US Classification:

2502521

Abstract:

A representative positron emission tomography (PET) calibration system includes a PET scanner having a ring detector, a phantom that is placed at approximately the center of the ring detector, and a time alignment calibration manager that is coupled to the PET scanner. The time alignment calibration manager detects coincidence events from the phantom, calculates position of time of flight events from the ring detector based on the detected coincidence events, and calculates time offsets for the ring detector using a mean value calculation based on the calculated position of the time of flight events.

US Patent:

8148694, Apr 3, 2012

Filed:

Jul 8, 2009

Appl. No.:

12/499524

Inventors:

Mark W. Lenox - Harriman TN, US
Blake Atkins - Maryville TN, US
Danny F Newport - Knoxville TN, US
Aaron McFarland - Knoxville TN, US
Stefan Siegel - Knoxville TN, US

Assignee:

Siemens Medical Solutions USA, Inc. - Malvern PA

International Classification:

G01T 1/164

US Classification:

25036303

Abstract:

A PET event position calculation method using a combination angular and radial event map wherein identification of the radial distance of the event from the centroid of the scintillation crystal with which the event is associated as well as angular information is performed. The radial distance can be converted to a statistical confidence interval, which information can be used in downstream processing. More sophisticated reconstruction algorithms can use the confidence interval information selectively, to generate higher fidelity images with higher confidence information, and to improve statistics in dynamic imaging with lower confidence information.

US Patent:

20070090300, Apr 26, 2007

Filed:

Oct 14, 2005

Appl. No.:

11/251232

Inventors:

Merence Sibomana - Knoxville TN, US
Mark Lenox - Harriman TN, US
Larry Byars - Oak Ridge TN, US
Christian Michel - Lenoir City TN, US
Danny Newport - Knoxville TN, US

International Classification:

G01N 23/04
G01T 1/24

US Classification:

250370090, 378063000, 600407000

Abstract:

Emission contamination data are collected in a shifted mock scan simultaneous with the collection of transmission data during a transmission scan of a patient with a collimated gamma point source, the transmission data are corrected with the emission contamination data, and the corrected transmission data are used for attenuation correction of emission data for reconstruction of an emission image of the patient. In a preferred implementation, when the point source is at a particular axial location and illuminates an axial beamwidth of “Fz” over the gamma detector, emission contamination data are collected from the gamma detector over an axial separated region “Fz′” having about the same axial extent but axially displaced by about half of the axial field of view (FOV).

US Patent:

20130308845, Nov 21, 2013

Filed:

Nov 7, 2012

Appl. No.:

13/671305

Inventors:

Mark W. Lenox - College Station TX, US

Assignee:

The Texas A&M University System - College Station TX

International Classification:

A61N 5/10
G06T 11/00

US Classification:

382131

Abstract:

Treatment for a variety of diseases often requires guidance for the delivery of either a drug or radiation to the disease site. Positron Emission Tomography (PET) can provide three dimensional positioning of the location of positron emitting radioisotopes that can mark a disease site. However, the inversion of the raw emission projection data into a 3D volume is computationally intensive, and this results in a low update or frame rate. In order to be useful in either guiding a surgeon, or some other automated feedback approach, the update/frame rate must be of sufficient speed that the user can effectively control the process. This approach provides a substantial improvement to the frame rate by taking advantage of iterative reconstruction methodologies to shortcut the reconstruction process.

US Patent:

20230091819, Mar 23, 2023

Filed:

Sep 22, 2021

Appl. No.:

17/481435

Inventors:

Mark Wayne LENOX - Idaho Falls ID, US

International Classification:

A61M 25/09
A61M 39/06

Abstract:

A catheter delivery device includes a hollow longitudinal body, a fluidic bypass, and a hemostasis valve. The hollow longitudinal body includes a clamping portion and a guide catheter. The guide catheter has a distal end for access into a vessel of a patient and a proximal end coupled to the clamping portion. The clamping portion has a distal end coupled to the guide catheter, a proximal end coupled to the hemostasis valve, and a guidewire securing section. When the guidewire securing section of the clamping portion is securing the guidewire, the fluidic bypass maintains fluid communication between the guide catheter and the hemostasis valve. In some cases, the guidewire securing section and the fluidic bypass are separated by material within the hollow longitudinal body. In some cases, the fluidic bypass is separate from the guidewire securing section outside of the hollow longitudinal body.

US Patent:

20190247013, Aug 15, 2019

Filed:

Feb 14, 2019

Appl. No.:

16/276531

Inventors:

- Novato CA, US
Mark Wayne LENOX - College Station TX, US

International Classification:

A61B 8/08
A61B 8/14
G06T 7/00

Abstract:

Microcalcifications can be detected using quantitative ultrasound tomography. Refraction-corrected reflection images generated from a quantitative ultrasound system can be thresholded, and morphologically analyzed to isolate voxels corresponding to microcalcifications.