SCINTILLATOR PANEL

• US 20110248186A1
• Filed: 11/11/2009
• Published: 10/13/2011
• Est. Priority Date: 11/28/2008
• Status: Active Grant

• Current Assignee: Konica Minolta Medical & Graphic Incorporated (Konica Minolta Inc.)
• Original Assignee: Konica Minolta Medical & Graphic Incorporated (Konica Minolta Inc.)
• Inventors: Iijima, Makoto, Kasai, Shigetami, Isa, Hiroshi, Nagata, Yasushi
• Granted Patent: US 8,748,849 B2
• Time in Patent Office: Days
• US Class Current: 250/483.1
• CPC Class Codes: C09K 11/628 with alkali or alkaline earth metals
• CPC Class Codes: G01T 1/20 with scintillation detectors
• CPC Class Codes: G21K 2004/06 with a phosphor layer
• 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

A scintillator panel which is capable of obtaining a radiation image exhibiting enhanced luminance and sharpness and achieving improved storage stability is disclosed, comprising on a support a base layer and a phosphor layer provided sequentially in this order, wherein the phosphor layer comprises (columnar) phosphor crystals formed of a phosphor parent compound and an activator by a process of vapor phase deposition and the base layer comprises crystals formed of the phosphor parent compound and an activator, and a relative density of the base layer is lower than a relative density of the phosphor layer and a relative content of an activator of the base layer is lower than a relative content of an activator of the phosphor layer.

Claims

1. A scintillator panel comprising on a support a base layer and a phosphor layer provided sequentially in this order, wherein the phosphor layer comprises columnar phosphor crystals formed of a phosphor parent compound and an activator by a process of vapor phase deposition and the base layer comprises crystals formed of the phosphor parent compound and the activator, and a relative density of the base layer is lower than a relative density of the phosphor layer and a relative content of an activator of the base layer is lower than a relative content of an activator of the phosphor layer.

2. The scintillator panel, as claimed in claim 1, wherein a thickness of the base layer satisfies the following expression:

0.01<

[(thickness of base layer)/(thickness of phosphor layer)]<

0.5. 

 

Expression

3. The scintillator panel, as claimed in claim 1, wherein the base layer is a layer comprising crystals formed by a process of vapor phase deposition.

4. The scintillator panel, as claimed in claim 1, wherein the phosphor parent compound is cesium iodide (CsI) and the activator is thallium (Tl).

5. A method of preparing a scintillator panel comprising on a support a base layer and a phosphor layer, the method comprising:

depositing a phosphor parent compound and an activator on the base layer by a process of vapor phase deposition to form the phosphor layer comprised of columnar phosphor crystals,

wherein the base layer comprises crystals comprised of the phosphor parent compound and the activator, and a relative density of the base layer is lower than a relative density of the phosphor layer and a relative content of an activator of the base layer is lower than a relative content of an activator of the phosphor layer.

6. The method, as claimed in claim 5, wherein a thickness of the base layer satisfies the following expression:

0.01<

[(thickness of base layer)/(thickness of phosphor layer)]<

0.5. 

 

Expression

7. The method, as claimed in claim 5, wherein the base layer is a layer comprising crystals formed by a process of vapor phase deposition.

8. The method, as claimed in claim 5, wherein the phosphor parent compound is cesium iodide (CsI) and the activator is thallium (Tl).