Radiation image taking apparatus

• US 20030026382A1
• Filed: 08/05/2002
• Published: 02/06/2003
• Est. Priority Date: 08/06/2001
• Status: Active Grant

• Current Assignee: Canon Ayutthaya Limited (Canon Inc.)
• Original Assignee: Canon Ayutthaya Limited (Canon Inc.)
• Inventors: Takeda, Shinichi
• Granted Patent: US 6,972,410 B2
• Time in Patent Office: Days
• US Class Current: 378/19
• CPC Class Codes: H01L 27/14658 X-ray, gamma-ray or corpuscular radiation imagers measuring X-, gamma- or corpuscular radiation G01T1/00
• CPC Class Codes: H04N 5/32 Transforming X-rays cameras or camera modules for generating image signals from X-rays H04N23/30; circuitry of SSIS for transforming X-rays into image signals H04N25/30
• CPC Class Codes: H05K 1/14 Structural association of two or more printed circuits providing electric connection to or between printed circuits H05K1/11, H01R12/00

Abstract

There is disclosed a radiation image taking apparatus including a radiation detecting unit which includes a plurality of photo-electric conversion elements and converts radiation into an electrical signal, a plate-like support member which supports the radiation detecting unit, an analog circuit unit having at least one of functions of controlling the radiation detecting unit, receiving an analog signal from the radiation detecting unit, processing the analog signal, and converting the analog signal into a digital signal, a digital circuit unit having at least one of functions of controlling at least one of other units and communicating with a unit outside the apparatus, and a power circuit unit for supplying power to at least one of other units, wherein the analog circuit unit, the digital circuit unit, and the power circuit unit are formed on separate circuit boards, respectively, and the analog circuit unit and the digital circuit unit are arranged in the opposite side of the radiation detecting unit in respect to the support member.

Claims

1. A radiation image taking apparatus comprising:

a radiation detecting unit which includes a plurality of photo-electric conversion elements and converts radiation into an electrical signal;

a plate-like support member which supports said radiation detecting unit;

an analog circuit unit having at least one of functions of controlling said radiation detecting unit, receiving an analog signal from said radiation detecting unit, processing the analog signal, and converting the analog signal into a digital signal;

a digital circuit unit having at least one of functions of controlling at least one of other units and communicating with a unit outside the apparatus; and

a power circuit unit for supplying electric power to at least one of other units,

wherein said analog circuit unit, said digital circuit unit, and said power circuit unit are formed on separate circuit boards, respectively, and said analog circuit unit and said digital circuit unit are arranged in the opposite side of said radiation detecting unit in respect to said support member.

2. An apparatus according to claim 1, wherein said power circuit unit is placed outside a region formed from all normals of a supporting surface of said support member.

3. An apparatus according to claim 1, wherein a shield wall having a noise shield function is provided for between at least two of said radiation detecting unit, said analog circuit unit, said digital circuit unit, and said power circuit unit.

4. An apparatus according to claim 3, wherein said shield wall is provided for by said support member.

5. An apparatus according to claim 3, wherein said shield wall is provided for by an outer cover of the apparatus.

6. An apparatus according to claim 2, wherein said digital circuit unit is placed adjacent to said power circuit unit.

7. An apparatus according to claim 6, wherein said digital circuit unit includes a first digital circuit unit for controlling a read of an analog signal from said radiation detecting unit and a second digital circuit unit different from said first digital circuit unit, and said power supply circuit unit, said first digital circuit unit, and said second digital circuit unit are formed on separate circuit boards, respectively, and arranged in the order named along a predetermined direction along said supporting surface of said support member.

8. An apparatus according to claim 7, wherein said analog circuit unit includes a first analog circuit unit for performing at least one of processing of the analog signal and conversion from the analog signal into a digital signal, and said power circuit unit, said first digital circuit unit, said second digital circuit unit, and said first analog circuit unit are formed on separate circuit boards, respectively, and arranged in the order named along a predetermined direction along said supporting surface of said support member.

9. An apparatus according to claim 7, wherein a detection surface of said radiation detecting unit is substantially rectangular, said analog circuit unit includes a second analog circuit which receives an analog signal from said radiation detecting unit and is formed on a circuit board different from other circuit units, said first digital circuit unit is placed along a first side of the detection surface, and said second analog circuit unit is placed along a second side of the detection surface which is perpendicular to the first side.

10. An apparatus according to claim 9, wherein said first digital circuit unit is divided into units, the first digital circuit units are respectively arranged along the first side of the detection surface and a third side opposing the first side, said second analog circuit unit is divided into units, and the second analog circuit units are respectively arranged along the second side of the detection surface and a fourth side opposing the second side.