JP2010520488A - 歯科応用に適応した小型のcmosに基づくx線検出器 - Google Patents
歯科応用に適応した小型のcmosに基づくx線検出器 Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/16—Measuring radiation intensity
- G01T1/20—Measuring radiation intensity with scintillation detectors
- G01T1/2018—Scintillation-photodiode combinations
- G01T1/20184—Detector read-out circuitry, e.g. for clearing of traps, compensating for traps or compensating for direct hits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/30—Cameras or camera modules comprising electronic image sensors; Control thereof for generating image signals from X-rays
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
- H04N25/70—SSIS architectures; Circuits associated therewith
- H04N25/76—Addressed sensors, e.g. MOS or CMOS sensors
- H04N25/77—Pixel circuitry, e.g. memories, A/D converters, pixel amplifiers, shared circuits or shared components
- H04N25/772—Pixel circuitry, e.g. memories, A/D converters, pixel amplifiers, shared circuits or shared components comprising A/D, V/T, V/F, I/T or I/F converters
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/30—Transforming light or analogous information into electric information
- H04N5/32—Transforming X-rays
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
- H04N25/60—Noise processing, e.g. detecting, correcting, reducing or removing noise
- H04N25/62—Detection or reduction of noise due to excess charges produced by the exposure, e.g. smear, blooming, ghost image, crosstalk or leakage between pixels
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
- H04N25/70—SSIS architectures; Circuits associated therewith
- H04N25/76—Addressed sensors, e.g. MOS or CMOS sensors
- H04N25/77—Pixel circuitry, e.g. memories, A/D converters, pixel amplifiers, shared circuits or shared components
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Abstract
【選択図】図1
Description
Claims (12)
- 画素センサーの2次元配列と;
前記2次元配列に隣接しているシンチレーション物質の層であって、前記シンチレーション物質はその上に衝突するX線に応じて光を放射すると共に、前記光が前記画素センサーによって検知され;
画素センサーの前記2次元配列に保存されたデータを読み取り、そこから画素の2次元配列を有するイメージを形成する制御装置であって、前記制御装置は前記イメージの形成過程で前記画素センサーに蓄積される電子を生成するX線に起因するエラーについてデータを修正する;
ことを特徴とするイメージセンサ。 - 請求項1に記載のイメージセンサにおいて、
前記制御装置は、複数のフレームを形成させるために画素センサーの前記2次元配列により生じる前記イメージを形成し、
各フレームは先行する時間間隔の間に各フォトダイオード上に蓄積された電荷の測定をするように構成され、
前記制御装置が前記イメージを形成するために前記フレームからのデータを組み合わせることを特徴とするイメージセンサ。 - 請求項2に記載のイメージセンサにおいて、
各々の前記画素センサーは、光検出器の受け取る前記光に応じて電荷を蓄積する前記光検出器と、リセット回路と、前記制御装置によって生成されたコマンドに応じて前記制御装置にその画素センサーを接続するインターフェースとを有し、
前記リセット回路は前記光検出器に結合して予め定められた電位により前記光検出器をリセットすることを特徴とするイメージセンサ。 - 請求項3に記載のイメージセンサにおいて、前記制御装置は前記リセット回路によって前記各フレームの終りで前記光検出器をリセットさせることを特徴とするイメージセンサ。
- 請求項2に記載のイメージセンサにおいて、前記制御装置は前記蓄積電荷がしきい値より大きい画素センサーを識別することを特徴とするイメージセンサ。
- 請求項5に記載のイメージセンサにおいて、前記制御装置が前記イメージ中の対応する画素を決定するために、各画素センサーに対して複数のフレームからデータを組み合わせると共に、前記制御装置は、前記イメージ中の形成において前記識別された画素センサーからのデータを組み合わせないことを特徴とするイメージセンサ。
- 請求項5に記載のイメージセンサにおいて、前記しきい値が前記画素センサーの異なるものには異なることを特徴とするイメージセンサ。
- 請求項1に記載のイメージセンサにおいて、各々の前記画素センサーは、さらに、
基準電圧を備えた前記画素中の前記光検出器によって生成された信号電圧を比較するコンパレーターであって、前記コンパレーターは前記信号電圧が前記基準電圧と予め定められた関係にある場合に停止信号を生成すると共に;
前記停止信号が生成されるまでの間、クロック入力からのパルスを数える第1のカウンタであって、前記第1のカウンタはディジタル値を記憶すること;
を備えることを特徴とするイメージセンサ。 - 請求項8に記載のイメージセンサにおいて、前記信号電圧がしきい電圧より大きい場合に、前記第1のカウンタがカウントすることを阻止されることを特徴とするイメージセンサ。
- 請求項9に記載のイメージセンサにおいて、各画素センサーがさらにフレーム信号によって加算される第2のカウンタを有し、前記第2のカウンタは前記信号電圧が前記しきい電圧より大きい場合に、前記フレーム信号による加算が阻止されることを特徴とするイメージセンサ。
- 請求項10に記載のイメージセンサにおいて、各画素センサーがさらに前記しきい電圧を記憶するためのメモリを構成することを特徴とするイメージセンサ。
- 請求項11に記載のイメージセンサにおいて、前記第2のカウンタを0にセットさせる決定としきい値リセット信号とに応じて、前記メモリに接続した導体の電圧を前記メモリが記憶することを特徴とするイメージセンサ。
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US11/683,535 | 2007-03-08 | ||
US11/683,535 US7615754B2 (en) | 2007-03-08 | 2007-03-08 | Compact CMOS-based x-ray detector adapted for dental applications |
PCT/US2008/055721 WO2008109565A1 (en) | 2007-03-08 | 2008-03-03 | Compact cmos-based x-ray detector adapted for dental applications |
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JP2010520488A true JP2010520488A (ja) | 2010-06-10 |
JP2010520488A5 JP2010520488A5 (ja) | 2011-03-24 |
JP5658878B2 JP5658878B2 (ja) | 2015-01-28 |
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JP2009552822A Active JP5658878B2 (ja) | 2007-03-08 | 2008-03-03 | 歯科応用に適応した小型のcmosに基づくx線検出器 |
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US (1) | US7615754B2 (ja) |
EP (1) | EP2135492B8 (ja) |
JP (1) | JP5658878B2 (ja) |
DK (1) | DK2135492T3 (ja) |
ES (1) | ES2542862T3 (ja) |
WO (1) | WO2008109565A1 (ja) |
Cited By (1)
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JP2014014451A (ja) * | 2012-07-06 | 2014-01-30 | Asahi Roentgen Kogyo Kk | X線撮影装置 |
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US8430563B2 (en) * | 2009-12-22 | 2013-04-30 | Real Time Imaging Technologies, Llc | Dental fluoroscopic imaging system |
JP2012024344A (ja) * | 2010-07-23 | 2012-02-09 | Canon Inc | X線撮影装置、x線撮影方法、プログラム及びコンピュータ記録媒体 |
KR101911314B1 (ko) * | 2012-03-30 | 2018-10-24 | 삼성전자주식회사 | 엑스선 검출기 |
US9063238B2 (en) * | 2012-08-08 | 2015-06-23 | General Electric Company | Complementary metal-oxide-semiconductor X-ray detector |
EP2871496B1 (en) | 2013-11-12 | 2020-01-01 | Samsung Electronics Co., Ltd | Radiation detector and computed tomography apparatus using the same |
US11559268B2 (en) | 2015-01-12 | 2023-01-24 | Real Time Imaging Technologies, Llc | Low-dose x-ray imaging system |
WO2018046454A1 (en) * | 2016-09-08 | 2018-03-15 | Koninklijke Philips N.V. | Radiation detector and x-ray imaging system |
FI20187059A1 (en) * | 2018-04-25 | 2019-10-26 | Athlos Oy | An ultra-fast scanning X-ray machine |
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US7615754B2 (en) | 2009-11-10 |
EP2135492B8 (en) | 2015-07-01 |
WO2008109565A1 (en) | 2008-09-12 |
JP5658878B2 (ja) | 2015-01-28 |
US20080217545A1 (en) | 2008-09-11 |
EP2135492A4 (en) | 2012-11-28 |
EP2135492B1 (en) | 2015-05-06 |
EP2135492A1 (en) | 2009-12-23 |
ES2542862T3 (es) | 2015-08-12 |
DK2135492T3 (da) | 2015-06-22 |
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