Agfa Gevaert Nv

Thomas Jefferson University

U.S. Radium Corporation

Light Medicine, Inc.

United States Radium Corporation

Melvin Tecotzky

Paul Leblans

Albert D Adriaensens

David R Terrell

John M Boone

Jan A Van Den Bogaert

Lodewijk M Neyens

James J Mattis

Luc A Struye

George Blasse

Andries Meijerink

William A McAllister

Benjamas S Davis

Harvey I Pass

David Mager

Albert K Fan

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.

Photodynamic therapy apparatus and methods

A photostimulable phosphor, wherein said phosphor is within the scope of the following empirical formula (A):

Photostimulable phosphor and radiation image recording and reproducing

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.

Photostimulable phosphors

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. In addition, a system comprising the quenchable phosphors can be built in such a manner as to overcome the optical stage quantum sink limitations in electronic imaging.

Method and apparatus for non-invasive imaging including quenchable

A photostimulable rare earth metal doped barium strontium fluoride phosphor, characterized in that said phosphor is within the scope of following empirical formula (I):

Photostimulable phosphor for use in radiography

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.

Binary screen, system and method for single pulse dual energy radiography

A method for recording and reproducing an X-ray image is provided which method comprises the steps of:

Reproduction of X-ray images with photostimulable phosphor

A photostimulable X-ray energy absorbing halosilicate, halogermanate or halo(silicate-germanate) phosphor, characterized in that said phosphor contains as host metal at least one alkaline earth metal, as halogen at least one member selected from the group consisting of Cl, Br and I, as dopant Eu.sup.2+ and as co-dopant at least one member selected from the group consisting of niobium and tantalum.

Photostimulable phosphor and its use in radiography

A method for recording and reproducing an X-ray image comprising the steps of:

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.

Silicon sensitized rare earth oxysulfide phosphors

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

Alpha barium zinc cadmium sulfide phosphors and method

Rare earth oxysulfide phosphors with excellent optical properties and optimum particle size control for use as cathodo-luminescent phosphors in cathode ray tubes 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.

Growing community of inventors

Mendham, NJ, United States of America

Melvin Tecotzky