Thomas J Lambert

US Patent:

45610541, Dec 24, 1985

Filed:

Oct 13, 1983

Appl. No.:

6/541772

Inventors:

Edward W. Andrews - Brookfield WI
Thomas W. Lambert - Dousman WI

Assignee:

General Electric Company - Schenectady NY

International Classification:

H04N 718

US Classification:

364414

Abstract:

Apparatus for reading out individual X-ray images recorded on a double-emulsion radiographic film or on separate films that were coincident when exposed simultaneously to a polyenergetic or broad X-ray photon energy spectrum beam emergent from a body and where an image corresponding to one obtained with a low energy part of the spectrum is formed on one film and an image corresponding to a higher energy part of the spectrum is formed on the other. One readout apparatus is for the case of two separate films which, after development, are illuminated from the back and optically scanned to derive analog signals representative of the intensities of spatially corresponding picture elements on each film. Another apparatus is for the case where the two images are on opposite sides of a film and are represented by alternate fine image information lines obtained by interposing a grid during the X-ray exposure. Another is for the case where a reflective layer is disposed between the film images during readout.

US Patent:

44829183, Nov 13, 1984

Filed:

Apr 26, 1982

Appl. No.:

6/371683

Inventors:

Gary S. Keyes - Hartland WI
Stephen J. Riederer - Wauwatosa WI
Thomas W. Lambert - Dousman WI
Barry N. Stone - Waukesha WI

Assignee:

General Electric Company - Schenectady NY

International Classification:

H04N 532

US Classification:

358111

Abstract:

Apparatus and methods are provided for performing temporal and hybrid subtraction of X-ray images. In one mode, using three memories, a pair of low and high energy X-ray exposures are made before an X-ray contrast medium arrives in a blood vessel to provide mask images. After contrast arrival additional high and low energy exposures are made and the low energy mask is subtracted from the low energy post-contrast images and the high energy mask is subtracted from the high energy post-contrast images and the resulting sequence of low and high energy temporal difference images are stored. The low energy temporal difference images are displayed. If motion artifacts are perceived, hybrid subtraction of low and high energy temporal difference images is undertaken to produce an image data set in which motion artifacts are removed. In an alternate mode, which uses four memories, low and high energy pre-contrast mask images are stored in one pair of memories. Low and high energy live post-contrast images are subtracted from the stored images and the resulting low and high energy temporal difference images are stored in the other pair of memories.

US Patent:

42452449, Jan 13, 1981

Filed:

Sep 1, 1978

Appl. No.:

5/939088

Inventors:

Robert R. Lijewski - Milwaukee WI
James E. Blake - New Berlin WI
Thomas W. Lambert - Dousman WI

Assignee:

General Electric Company - Schenectady NY

International Classification:

H04N 532

US Classification:

358111

Abstract:

Data derived from multiple x-ray views of a body layer is processed in accordance with an image reconstruction algorithm by a central processing unit (CPU) to result in a matrix of digital data corresponding with picture elements (pixels) which are for being displayed on a tv or video monitor. A device for delineating or identifying a region in the displayed picture with a box, irregular trace, or cursor with a bright dotted line uses a trackball to generate data signals corresponding in position with pixels in the matrix. The trackball generated data is processed for producing video picture modulating signals corresponding with the pixels in the matrix to which they positionally relate. The modulating signals are overlayed on the composite video signals from the display controller with a video mixer.

US Patent:

40244016, May 17, 1977

Filed:

Jun 4, 1976

Appl. No.:

5/692866

Inventors:

Stanley Bernstein - Whitefish Bay WI
Thomas W. Lambert - Hales Corners WI
Philip J. Griswa - Waukesha WI
Lucius Stagg - Milwaukee WI

Assignee:

General Electric Company - Schenectady NY

International Classification:

G03D 4116

US Classification:

250439R

Abstract:

X-ray apparatus includes a floor mounted enclosure, a patient supporting table on the enclosure, an X-ray tube casing mounted for angulating in the enclosure, X-ray imaging devices unitarily supported for angulating on a cantilever arm located above the table, and an extensible and contractible and optionally removable link arm for coupling the tube casing and image devices, respectively, to enable their coordinate longitudinal angulation or selectively to enable maintaining the X-ray tube and imaging devices in a fixed vertical relationship.

US Patent:

42597250, Mar 31, 1981

Filed:

Mar 1, 1979

Appl. No.:

6/016665

Inventors:

Edward W. Andrews - Milwaukee WI
James E. Blake - New Berlin WI
Thomas W. Lambert - Dousman WI

Assignee:

General Electric Company - Schenectady NY

International Classification:

G06F 314
G01N 2100

US Classification:

364521

Abstract:

A composite video signal waveform is fed through a video mixer and to a video monitor for displaying a raster scanned image on its screen. Signals are also fed through the mixer for causing a cursor having distinctive light intensity to be overlayed on the image. Programs for defining multiple cursors are stored in a readable memory. A microprocessor uses the programs for generating cursor parameters for each horizontal raster line and these are stored in a random access memory. A direct memory access controller responds to occurrence of each horizontal sync pulse by loading the cursor parameters for each corresponding raster line into counters which determine the starting point and end point of the cursor in that line or the width of the particular cursor line. During the interval representative of cursor line width, signals are fed through the mixer for altering the brightness intensity of the display. The random access memory is read out on a horizontal line-by-horizontal line basis so as to produce a whole cursor configuration between vertical blanking intervals.

US Patent:

43619010, Nov 30, 1982

Filed:

Nov 18, 1980

Appl. No.:

6/208095

Inventors:

Herbert E. Daniels - Brown Deer WI
Frank Bernstein - Milwaukee WI
Thomas W. Lambert - Dousman WI
Norbert J. Pelc - Wauwatosa WI

Assignee:

General Electric Company - Schenectady NY

International Classification:

G03B 4116

US Classification:

378106

Abstract:

X-ray pulses at two different photon energy levels are produced with an x-ray tube that has an adjustable resistor element in a circuit that connects the anode and filament of the tube to a high voltage supply. Two bias voltage supplies are connected in additive fashion between a control grid element of the tube and its filament to enable control of voltage drop and current through the tube. Switch means are provided to selectively shunt either or both bias voltage supplies in a repeatable order to thereby alter the bias voltage on the control grid and enable producing x-ray pulses having energies corresponding with the voltage drop and current through the tube at a selected bias voltage in accordance with the load line on the anode characteristic curve plot of the tube as determined by the value of the adjustable resistor element.

US Patent:

47000589, Oct 13, 1987

Filed:

Aug 1, 1985

Appl. No.:

6/761439

Inventors:

Barry F. Belanger - Milwaukee WI
Thomas P. L. Liu - New Berlin WI
Thomas W. Lambert - Dousman WI

Assignee:

General Electric Company - Milwaukee WI

International Classification:

H04N 532
G01D 1800

US Classification:

250205

Abstract:

An imaging system for generating a image on film from video image data incorporates feedback control techniques to provide control of film density. The system includes variable gain amplifiers responsive to light intensity output of a film writing device for maintaining the output at a desired set level. In addition, the system includes apparatus and a method for monitoring the density of film images produced by the system and for utilizing the monitored values to modify the system transfer function in a direction to effect a change in the film density towards a desired value.

US Patent:

42284651, Oct 14, 1980

Filed:

Dec 26, 1978

Appl. No.:

5/973281

Inventors:

Barry N. Stone - Waukesha WI
Thomas W. Lambert - Dousman WI

Assignee:

General Electric Company - Schenectady NY

International Classification:

H04N 514
H04N 521
H04N 532

US Classification:

358166

Abstract:

In a convolver, analog video waveforms for each horizontal line to a raster scanned video monitor are sampled at regular intervals with a high speed shift register such as a charge coupled device to obtain trains of picture elements (pixels) which are transferred line-after-line to a series of registers to thereby delay the lines by the number of register stages used. As the trains are transferred the pixels are simultaneously supplied to delay elements to delay corresponding pixels in each line by a given amount in reference to the individual pixel which is to be convolved at the instant. The delayed pixel signals existing at the instant are variously processed in summing devices and the result is used to act on the individual pixel to convolve it in accordance with the filter function which is desired.