Mark E Shafer

US Patent:

6985270, Jan 10, 2006

Filed:

Aug 9, 2000

Appl. No.:

09/635600

Inventors:

John T. Keech - Penfield NY, US
John P. Spence - Webster NY, US
Mark E. Shafer - Fairport NY, US
Donald O. Bigelow - Webster NY, US

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

H04N 1/46

US Classification:

358504, 358527, 358406, 358 12, 382194, 382199, 430496, 430359

Abstract:

A method of calibrating digital images having pixels with pixel values includes the steps of: exposing a photographic element to form a latent image of a reference calibration target including a plurality of reference calibration patches; exposing the photographic element to form a latent image of a scene; processing the photographic element to form developed images from the latent images on the photographic element; scanning the developed images to produce digital images; measuring the pixel values of the digital image of the reference calibration target to produce a measured value for each of the reference calibration patches; obtaining an aim value and adjustment data corresponding to each reference calibration patch; generating image calibration corrections using the measured values, the aim values, and the adjustment data; and applying the image calibration corrections to the digital image of the scene.

US Patent:

7429737, Sep 30, 2008

Filed:

Nov 9, 2006

Appl. No.:

11/558128

Inventors:

Timothy J. Wojcik - Rochester NY, US
Jeffrey W. Byng - Toronto, CA
Bradley S. Jadrich - Rochester NY, US
Mark E. Shafer - Fairport NY, US
Kwok-Leung Yip - Webster NY, US

Assignee:

Carestream Health, Inc. - Rochester NY

International Classification:

G01T 1/24

US Classification:

25037009

Abstract:

A digital radiography () detector has a first housing () having substantially the form factor of a film cassette and having a chest wall edge (C). The first housing () has an X-ray converter () with a detection array (), each detector generating a signal according to an amount of radiation received. Readout electronics () are coupled with switching elements in the detection array for obtaining the signals therefrom. The readout electronics () include elements formed from crystalline silicon and are distributed toward outer edges of the first housing () and away from the chest wall edge (C). X-ray shielding selectively protects the readout electronics () and is located beneath a portion of the detection array. A second housing (), electrically connected to the first housing () has a power source for the detector, readout and control electronics for obtaining signals provided from the detection array ().

US Patent:

7576349, Aug 18, 2009

Filed:

Dec 23, 2005

Appl. No.:

11/316851

Inventors:

Rongguang Liang - Penfield NY, US
Mark E. Shafer - Fairport NY, US

Assignee:

Carestream Health, Inc. - Rochester NY

International Classification:

G03C 5/16

US Classification:

250580

Abstract:

A radiation readout apparatus includes: a concave mirror defining a central optical axis; a refractive lens assembly spaced from the concave mirror and symmetrical with the optical axis; an optical assembly which is optically coupled to the refractive lens assembly; a color filter for filtering out leaked stimulating radiation; and a dichroic prism optically coupled to the optical assembly for directing a linear stimulating radiation beam of a first wavelength, which is projected into the dichroic prism from the system, to a stimulable phosphor at the stimulable phosphor location, wherein stimulated radiation of a second wavelength emitted by the stimulable phosphor is passed back through the dichroic prism through the optical assembly, through the refractive lens assembly, reflected from the concave mirror, passed back through the refractive lens assembly, through the optical assembly, through the color filter, and to a linear sensor located at the sensor location.

US Patent:

20110303849, Dec 15, 2011

Filed:

Jun 9, 2010

Appl. No.:

12/797114

Inventors:

Timothy J. Tredwell - Fairport NY, US
Mark E. Shafer - Fairport NY, US
Robert W. Kulpinski - Penfield NY, US
Timothy J. Wojcik - Rochester NY, US

International Classification:

G01T 1/20

US Classification:

250362, 250366

Abstract:

Embodiments of radiographic imaging apparatus and methods for operating the same can include a first scintillator, a second scintillator, a plurality of first photosensitive elements, and a plurality of second photosensitive elements. The plurality of first photosensitive elements receives light from the first scintillator and has first photosensitive element characteristics chosen to cooperate with the first scintillator properties. The plurality of second photosensitive elements are arranged to receive light from the second scintillator and has second photosensitive element characteristics different from the first photosensitive element characteristics and chosen to cooperate with the second scintillator properties. Further, the first scintillator can have first scintillator properties and the second scintillator can have second scintillator properties different from the first scintillator properties.

US Patent:

20130001426, Jan 3, 2013

Filed:

Jun 30, 2011

Appl. No.:

13/173384

Inventors:

Timothy J. Tredwell - Fairport NY, US
Mark E. Shafer - Fairport NY, US

International Classification:

H01L 27/146

US Classification:

25037009

Abstract:

Embodiments of radiographic imaging systems; digital radiography detectors and methods for using the same can monitor and/or control trap occupancy levels in photosensors of radiographic sensors (e.g., DR FPDs). In exemplary radiographic imaging apparatus embodiments, monitoring of trap occupancy or change in trap occupancy of the photosensor can determine whether an imaging array or detector panel has reached a stable operating point. In another embodiment, trap occupancy information can be used (a) to enable a generator (e.g., x-ray source) for a radiographic exposure and/or (b) to adjust to or to maintain a change in trap occupancy level at pre-determined set-point or to adjust to or maintain a change in trap occupancy level within a prescribed range (e.g., using clock signals and bias voltages applied to the photosensor).

US Patent:

20130259194, Oct 3, 2013

Filed:

Dec 21, 2012

Appl. No.:

13/724037

Inventors:

Kwok L. Yip - Webster NY, US
Timothy J. Wojcik - Rochester NY, US
Mark E. Shafer - Fairport NY, US
Bradley S. Jadrich - Rochester NY, US
Pavlo Baturin - Rochester NY, US

International Classification:

A61B 6/00

US Classification:

378 37, 378 62

Abstract:

Embodiments of methods and apparatus are disclosed for obtaining a phase-contrast digital mammography system and methods for same that can include an x-ray source for radiographic imaging; a beam shaping assembly including a filter or a tunable monochromator, a collimator, a source grating, an x-ray grating interferometer including a phase grating, and an analyzer grating; and an x-ray detector; where the source grating, the phase grating, and the analyzer grating are aligned in such a way that the grating bars of these gratings are parallel to each other.

US Patent:

55723381, Nov 5, 1996

Filed:

Oct 18, 1994

Appl. No.:

8/326162

Inventors:

Mark E. Shafer - Fairport NY
Lawrence E. Walther - Macedon NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

H04N 104
H04N 140

US Classification:

358474

Abstract:

A scanner control circuit comprises a digital line delay memory and a control circuit coupled to the digital line delay memory. The control circuit receives digital multi-channel image data having a channel-to-channel delay and corrects for said channel-to-channel delay. Each channel's image data is written into the digital line delay memory at an address in the digital line delay memory corresponding to the correct line number and is then read out of the digital line delay memory for processing. The scanner control circuit operates to allow scanning of an object bi-directionally.

US Patent:

62809148, Aug 28, 2001

Filed:

Aug 9, 2000

Appl. No.:

9/635496

Inventors:

John T. Keech - Penfield NY
Donald O. Bigelow - Webster NY
Mark E. Shafer - Fairport NY
John P. Spence - Webster NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

G03C 100

US Classification:

430496

Abstract:

A method of recording a reference calibration target on an APS format photographic element having a reserved area for use by photofinishing apparatus, and a perforation located relative to the reserved area, includes the steps of: generating a reference calibration target having a width no greater than 30. 2 mm and a height no greater than 16. 7 mm; locating the reserved area of the photographic element relative to the perforation; and recording the reference calibration target within the reserved area.