Radiation image conversion panel

Patent metadata

Field	Value
Publication number	US-9417336-B2
Application number	US-201314424652-A
Country	US
Kind code	B2
Filing date	Aug 1, 2013
Priority date	Aug 29, 2012
Publication date	Aug 16, 2016
Grant date	Aug 16, 2016

Abstract

A radiation image converting panel includes a flexible support, a photostimulable phosphor layer provided on the main surface of the support and made of a plurality of columnar crystals, a first protective film provided on the photostimulable phosphor layer, and a second protective film provided on the first protective film, the photostimulable phosphor layer is composed of a photostimulable phosphor including Eu-doped CsBr, the first protective film is provided so as to cover the upper surface and side surface of the photostimulable phosphor layer and fill a gap of the plurality of columnar crystals in the photostimulable phosphor layer, the pencil hardness of the second protective film is not more than the pencil hardness of the first protective film, and the radiation image converting panel has a flexibility of up to a bending radius of 15 mm.

First claim

The invention claimed is:

1. A radiation image converting panel comprising:
a flexible support;
a photostimulable phosphor layer provided on a main surface of the support, made of a plurality of columnar crystals;
a first protective film provided on the photostimulable phosphor layer; and
a second protective film provided on the first protective film; and the second protective film is provided along the main surface of the support, wherein
the photostimulable phosphor layer is composed of a photostimulable phosphor including Eu-doped CsBr,
the first protective film is provided in a gap of the plurality of columnar crystals in the photostimulable phosphor layer, so as to cover an upper surface and a side surface of the photostimulable phosphor layer,
a pencil hardness of the second protective film is not more than a pencil hardness of the first protective film, and
the radiation image converting panel has a flexibility of up to a bending radius of 1.5 mm,
wherein the first protective film extends to over a side surface of the support,
wherein the first protective film is provided so as to further cover the whole of the support and the photostimulable phosphor layer, and
wherein the first protective film is formed so as to suppress the columnar crystals from opening when the radiation image converting panel is bent to a side of a back surface of the support that is on a side opposite to the main surface of the support.

2. The radiation image converting panel according to claim 1 , wherein the support is composed of a resin film.

3. The radiation image converting panel according to claim 1 , wherein the support is composed of polyimide.

4. The radiation image converting panel according to claim 1 , wherein the first protective film is a protective film with moisture resistance.

5. The radiation image converting panel according to claim 1 , wherein the first protective film is composed of polyparaxylylene.

6. The radiation image converting panel according to claim 1 , wherein the second protective film is a protective film with scratch resistance.

7. The radiation image converting panel according to claim 1 , wherein the second protective film is composed of a urethane-acrylic-based resin.

8. The radiation image converting panel according to claim 1 , further comprising an excitation light absorbing layer provided on the back surface of the support that is on a side opposite to the main surface of the support.

9. The radiation image converting panel according to claim 1 , wherein the photostimulable phosphor layer has a helical structure for which the columnar crystal is stacked in a helical shape at a side close to the support.

10. The radiation image converting panel according to claim 1 , further comprising a photostimulated luminescence reflection layer provided between the support and the photostimulable phosphor layer.

11. The radiation image converting panel according to claim 1 , further comprising a third protective film provided on the back surface of the support that is on a side opposite to the main surface of the support, wherein
the third protective film is a protective film with scratch resistance.

Assignees

• Hamamatsu Photonics Kk

Inventors

• Sakurai Jun
• Suzuki Katsuhiko
• Shimizu Ichinobu
• Kamimura Gouji

Classifications

• A61B6/4208

  characterised by using a particular type of detector · CPC title

• G21K2004/10

  with a protective film · CPC title

• C09K11/7733

  with alkali or alkaline earth metals · CPC title

• G21K4/00 Primary

  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) · CPC title

• G21K2004/06

  with a phosphor layer · CPC title