Melvin P Tecotzky

52162524, Jun 1, 1993

Jul 24, 1991

7/735060

John M. Boone - Radnor PA
Melvin Tecotzky - Mendham NJ

Thomas Jefferson University - Philadelphia PA

G21K 400

2504861

A binary screen, system and method for performing dual energy radiographic imaging, using single pulse x-rays, are depicted. The binary screen includes a first phosphor which emits light of a first wavelength and a second phosphor which emits light of a second wavelength. The first and second phosphors are heterogeneously dispersed in the binary screen. The first phosphor is preferably Gd. sub. 2 O. sub. 2 S:Eu. sup. +3 and the second phosphor is preferably Y. sub. 2 O. sub. 2 S:Gd. sup. +3. The second phosphor can also be Y. sub. 2 O. sub. 3 :Gd, Y. sub. 2 O. sub. 2 S:Pr or Y. sub. 2 O. sub. 2 S:Neodymium.

55142982, May 7, 1996

May 30, 1995

8/454000

David R. Terrell - Lint, BE
Albert D. Adriaensens - Mortsel, BE
Lodewijk M. Neyens - Kontich, BE
Melvin Tecotzky - Mendham NJ
Benjamas S. Davis - San Bernardino CA

Agfa-Gevaert, N.V. - Mortsel

C09K 1100
C09K 1161

2523014H

A photostimulable rare earth metal doped barium strontium fluoride phosphor, characterized in that said phosphor is within the scope of following empirical formula (I): Ba. sub. 1-x Sr. sub. x F. sub. 2-a-b Br. sub. a X. sub. b :zA wherein: X is at least one member selected from the group consisting of Cl and I; x is in the range 0. 06. ltoreq. x. ltoreq. 50; a is in the range 0. 75. ltoreq. a. ltoreq. 96; b is in the range 0. ltoreq. b

59447486, Aug 31, 1999

Jul 25, 1997

8/900975

David Mager - Leverett MA
Harvey I. Pass - Novi MI
Melvin Tecotzky - Mendham NJ

Light Medicine, Inc. - Leverett MA

A61B 1736

607 88

A device for applying light in photodynamic therapy is arranged to apply light in a pattern corresponding to the configuration of the lesion to be treated. The device may be customized in response to an image of the patient acquired before treatment. Alternatively, the device may include sensors for detecting a characteristic of tissue overlying each region of the device so that the device either emits light or does not emit light in each region depending upon the characteristics of the overlying tissue.

39808874, Sep 14, 1976

Apr 11, 1975

5/567200

James J. Mattis - Long Valley NJ
Melvin Tecotzky - Mendham NJ

U.S. Radium Corporation - Morristown NJ

G01T 100

250483

Rare earth oxysulfide phosphors with excellent optical properties and optimum particle size control for use as photoluminescent, cathodoluminescent and X-ray luminescent phosphors are prepared by treating a solution of at least one salt of a rare earth metal and a salt of a rare earth activator to form solid salts and thereafter heating the oxidic compound with a sulfidizing agent and a silicon sensitizer, preferably in the presence of a fluoride. The rare earth oxysulfide phosphors thus obtained contain from 10 to 1,000 p. p. m. silicon sensitizer and, if used, 20 to 500 p. p. m. fluoride, incorporated in the crystal lattice structure.

55148743, May 7, 1996

Feb 7, 1994

8/192770

John M. Boone - Folsom CA
Melvin Tecotzky - Mendham NJ

Thomas Jefferson University - Philadelphia PA

G21K 400

2504861

An invention is described which uses quenchable phosphors to achieve a novel emission response in intensifying screens. The quenchable phosphor has the characteristic of reducing its efficiency of converting incident x-ray, gamma ray, or ionizing particulate radiations into emitted radiation in the ultraviolet (UV), visible or infrared (IR) regions of the electromagnetic spectrum when being essentially simultaneously irradiated by a spectrum of radiation of a specific range in the UV to visible to IR spectrum. The quenchable phosphor is combined with another class of phosphor, which emits the spectrum of radiation when struck by ionizing radiation which is similar or identical to the quenching radiation of the quenchable phosphor. These phosphors can be combined in a variety of geometrical manners, both homogeneously and heterogeneously, to achieve extended dynamic range and spatial frequency filtering for radiographic imaging systems. The invention has equal application for electronic imaging systems such as x-ray image intensifiers.

39705820, Jul 20, 1976

Dec 4, 1975

5/637840

Albert K. Fan - Hackettstown NJ
Melvin Tecotzky - Mendham NJ

United States Radium Corporation - Morristown NJ

C09K 1146

2523016S

New phosphors which may be activated to luminesce in the red to green portion of the spectrum have an alpha crystal structure isostructural with Ba. sub. 2 MnS. sub. 3 and the composition Ba. sub. 2 Zn. sub. 1. sub. -y Cd. sub. y S. sub. 3 : A. sub. w. sup. zZnS wherein A is an activator element selected from the group consisting of manganese, europium, cerium, lead and terbium, y is a numerical value in the range from 0 to 1, z is a numerical value in the range from 0 to 20, and w is a numerical value in the range from 0. 00001 to 0. 1. Methods of making these phosphors are described.

51401630, Aug 18, 1992

Sep 16, 1988

7/245621

Melvin Tecotzky - Mendham NJ
George Blasse - GC Bunnik, NL
Andries Meijerink - HT Wijk bij Duurstede, NL
David R. Terrell - Lint, BE
Luc A. Struye - Mortsel, BE

Agfa-Gevaert, N.V. - Mortsel

G01N 2304
C09K 1146

2504841

A method for recording and reproducing an X-ray image is provided which method comprises the steps of: (1) causing a photostimulable phosphor to absorb image-wise or pattern-wise modulated X-rays, (2) photostimulating said phosphor with stimulating electromagnetic radiation selected from visible light and infrared light to release from the phosphor in accordance with the absorbed X-rays electromagnetic radiation different in wavelength characteristic from the radiation used in the photo-stimulation, and (3) detecting said light emitted by photostimulation, wherein said phosphor is a halosilicate containing as host metal at least one member selected from the group consisting of Ca, Sr, Ba, Mg, Cd, Zn and Pb, as halogen at least one member selected from the group consisting of Cl, Br and I, and comprising as dopant(s) Eu. sup. 2+ and/or Cr. sup. 3+.

55478077, Aug 20, 1996

Mar 15, 1995

8/404599

Paul Leblans - Berchem, BE
Albert D. Adriaensens - Mortsel, BE
Melvin Tecotzky - Mendham NJ
Jan A. Van den Bogaert - Schilde, BE

AGFA-Gevaert, N.V. - Mortsel

G03C 1675
G03C 1705
G03C 517

430139

A photostimulable phosphor of which the emission intensity at the stimulation wavelength of 550 nm is higher than the emission intensity at the stimulation wavelength of 600 nm, characterized in that said phosphor is a divalent europium activated barium fluorobromide containing as codopant samarium, and wherein the terminology barium fluorobromide stands for an empirical formula wherein (1) a minor part of the barium (less than 50 atom %) is replaced optionally by at least one metal selected from the group consisting of a monovalent alkali metal, a divalent alkaline earth metal other than barium, and a trivalent metal selected from the group consisting of Al, Ga, In, Tl, Sb, Bi, Y, and a rare earth metal selected from the group consisting of Ce, Pr, Nd, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu, (2) a minor part (less than 50 atom %) of the bromine is replaced by chlorine, and/or iodine, and (3) wherein fluorine is present stoichiometrically in a larger atom % than bromine taken alone or bromine combined with chlorine and/or iodine.