Title:
飛行時間式PET用の集積複数チャネル時間-デジタル変換器
Document Type and Number:
Japanese Patent JP2009540339
Kind Code:
A
Abstract:
In a radiation detector (10) for a time of flight positron emission tomography (PET) scanner (2), a radiation sensitive member (20) generates a signal (22) indicative of a radiation detection event. A time to digital converter (34) includes digital delay elements (40) operatively interconnected as a ring oscillator (36, 36′) and readout circuitry (50, 52, 60, 82, 84, 86, 88) configured to generate a timestamp for the radiation detection event based at least on a state of the ring oscillator when the signal is generated. Delay trim elements (46) operatively connected to the digital delay elements set a substantially common delay for the digital delay elements. Additionally or alternatively, the digital delay elements (40) include readout buffers (48′) having transition times substantially longer than a delay of the digital delay elements, analog to digital converters (82, 84) digitize values of the delay elements, and decoding circuitry (86, 88) computes the state of the ring oscillator (36′) based on the digitized values.
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Inventors:
Solf, Torsten, yacht.
Fisher, Peter
Fisher, Peter
Application Number:
JP2009515559A
Publication Date:
November 19, 2009
Filing Date:
May 29, 2007
Export Citation:
Assignee:
Koninklijke Philips Electronics N.V.
International Classes:
G01T1/161; H03K3/0231; H03K5/13; H03K21/02
Foreign References:
| US20030076181A1 | 2003-04-24 | |||
| WO2004111682A1 | 2004-12-23 | |||
| US20030076181A1 | 2003-04-24 |
Other References:
JPN6012026001; Ｃｈａｎ-Ｈｏｎｇ Ｐａｒｋ， Ｏｏｋ Ｋｉｍ ａｎｄ Ｂｅｏｍｓｕｐ Ｋｉｍ: 'Ａ １．８-ＧＨｚ Ｓｅｌｆ-Ｃａｌｉｂｒａｔｅｄ Ｐｈａｓｅ-Ｌｏｃｋｅｄ Ｌｏｏｐ ｗｉｔｈ Ｐｒｅｃｉｓｅ Ｉ／Ｑ Ｍａｔｃｈｉｎｇ' ＩＥＥＥ Ｊｏｕｒｎａｌ ｏｆ Ｓｏｌｉｄ Ｓｔａｔｅ ｃｉｒｃｕｉｔｓ Ｖｏｌ．３６ Ｎｏ．５, 200105, Ｐ７７７-７８３
Attorney, Agent or Firm:
Tadahiko Ito
Shinsuke Onuki
Tadashige Ito
Shinsuke Onuki
Tadashige Ito