RADIATION IMAGE CONVERSION PANEL AND PREPARATION METHOD THEREOF

• US 20090078887A1
• Filed: 03/22/2006
• Published: 03/26/2009
• Est. Priority Date: 03/31/2005
• Status: Active Grant

• Current Assignee: Konica Minolta Medical & Graphic Incorporated (Konica Minolta Inc.)
• Original Assignee: Konica Minolta Medical & Graphic Incorporated (Konica Minolta Inc.)
• Inventors: Arimoto, Tadashi, Yanagita, Takafumi
• Granted Patent: US 7,834,330 B2
• Time in Patent Office: Days
• US Class Current: 250/484.400
• CPC Class Codes: C09K 11/7733 with alkali or alkaline earth metals
• CPC Class Codes: G21K 2004/10 with a protective film
• CPC Class Codes: G21K 4/00 Conversion screens for the conversion of the spatial distribution of X-rays or particle radiation into visible images, e.g. fluoroscopic screens photographic processes using X-ray intensifiers G03C5/17; discharge tubes comprising luminescent screens H01J1/62; cathode ray tubes for X-ray conversion with optical output H01J31/50

Abstract

There is provided a radiation image conversion panel having strong resistance to physical impact, and in which enhanced sharpness and adhesion are balanced, especially, enhanced adhesion of a photostimulable phosphor layer onto a support is achieved, and a preparation method of the radiation image conversion panel. The radiation image conversion panel comprising on a support a sublayer and at least one photostimulable phosphor layer in this order from the support, featured in that the photostimulable phosphor layer is formed by a gas phase method and has a thickness of not less than 50 μm, and the sublayer comprises a thermoplastic resin and the thickness of the central portion in an image area of the sublayer is greater than that of the peripheral portion of the image area.

Claims

1. A radiation image conversion panel comprising on a support a sublayer and at least one photostimulable phosphor layer in this order from the support, wherein the photostimulable phosphor layer is formed by a gas phase method and has a thickness of not less than 50 μ

m, and the sublayer comprises a thermoplastic resin and a thickness of a central portion in an image area of the sublayer is greater than that of a peripheral portion of the image area.

2. The radiation image conversion panel of claim 1, wherein the thickness of the central portion is 3 to 50% greater than that of the peripheral portion.

3. The radiation image conversion panel of claim 1, wherein the photostimulable phosphor layer comprises columnar crystals of an alkali halide photostimulable phosphor.

4. The radiation image conversion panel of claim 3, wherein the columnar crystals of an alkali halide photostimulable phosphor comprise CsBr type columnar crystals.

5. A method of preparing a radiation image conversion panel of claim 1, wherein a sublayer is formed by allowing a coating solution to drop onto a support and spin-coating the dropped coating solution on the support through a centrifugal force.