Scintillator panel

• US 10,705,227 B2
• Filed: 04/17/2019
• Issued: 07/07/2020
• Est. Priority Date: 04/19/2018
• Status: Active Grant

• Current Assignee: Konica Minolta Inc.
• Original Assignee: Konica Minolta Inc.
• Inventors: Shindou, Hiromichi, Hagiwara, Kiyoshi
• Primary Examiner(s): Gaworecki, Mark R
• Application Number:
  US16/386,720
• Publication Number:
  US 20190324158A1
• Time in Patent Office: 447 Days
• CPC Class Codes: A61B 6/4208 characterised by using a particular type of detector
• CPC Class Codes: A61B 6/484 involving phase contrast X-ray imaging
• CPC Class Codes: G01T 1/2002 Optical details, e.g. reflecting or diffusing layers
• CPC Class Codes: G01T 1/20185 Coupling means between the photodiode and the scintillator, e.g. optical couplings using adhesives with wavelength-shifting fibres

Abstract

[Problem] Provided is a layered structure in which a non-scintillator layer is utilized as a light transmission path to a sensor so as to transmit light in a vertical direction through the non-scintillator layer without allowing the light to re-enter a scintillator layer.

[Means for Solution] Provided is a scintillator panel having a structure in which a scintillator layer and a non-scintillator layer are repeatedly arranged in a direction substantially parallel to a radiation incident direction. In this scintillator panel, the scintillator layer contains at least a phosphor, a binder resin, and voids; the non-scintillator layer is radiolucent; the scintillator layer and the non-scintillator layer have an irregular structure at their interface; and an arithmetic surface roughness Ra attributed to irregularities is 1/400 to 1/10 of the width of the non-scintillator layer.

Claims

1. A scintillator panel having a structure in which a scintillator layer and a non-scintillator layer are repeatedly arranged in a direction substantially parallel to a radiation incident direction, wherein

the scintillator layer comprises at least a phosphor, a binder resin, and voids,

the non-scintillator layer is radiolucent,

the scintillator layer and the non-scintillator layer have an irregular structure at their interface, and

an arithmetic surface roughness Ra attributed to irregularities is 1/400 to 1/10 of the width of the non-scintillator layer.

2. The scintillator panel according to claim 1, wherein an average refractive index n1 of the binder resin and the voids of the scintillator layer and a refractive index n2 of the non-scintillator layer satisfy a relationship of n1<

n2.

3. The scintillator panel according to claim 1, capturing a phase contrast image.

4. A scintillator panel having a structure in which a scintillator layer and a non-scintillator layer are repeatedly arranged in a direction substantially parallel to a radiation incident direction, wherein

the scintillator layer comprises at least a phosphor, a binder resin, and voids,

the non-scintillator layer is radiolucent and comprises transparent fine particles, and

the translucent fine particles exist such that their average gap is 1/10 to four times of the width of the non-scintillator layer.