JP4759255B2 - 静止型コンピュータ断層撮影システム及び方法 - Google Patents
静止型コンピュータ断層撮影システム及び方法 Download PDFInfo
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- A—HUMAN NECESSITIES
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- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
- A61B6/42—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment with arrangements for detecting radiation specially adapted for radiation diagnosis
- A61B6/4275—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment with arrangements for detecting radiation specially adapted for radiation diagnosis using a detector unit almost surrounding the patient, e.g. more than 180°
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- A—HUMAN NECESSITIES
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- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
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- A61B6/02—Devices for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
- A61B6/027—Devices for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis characterised by the use of a particular data acquisition trajectory, e.g. helical or spiral
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- A—HUMAN NECESSITIES
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- A61B6/40—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment with arrangements for generating radiation specially adapted for radiation diagnosis
- A61B6/4007—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment with arrangements for generating radiation specially adapted for radiation diagnosis characterised by using a plurality of source units
- A61B6/4014—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment with arrangements for generating radiation specially adapted for radiation diagnosis characterised by using a plurality of source units arranged in multiple source-detector units
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
- G01N23/04—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material
- G01N23/046—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material using tomography, e.g. computed tomography [CT]
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Description
12 スキャナ
14 テーブル
30 分布形X線源
32 電子ビーム・エミッタ
34 ターゲット
36 電子ビーム
38 X線ビーム
40 コリメータ
42 開口
44 コリメートされたビーム
46 検出器
48 検出器素子
50 信号処理回路
52 リング状検出器
54 リング状線源
56 線状線源
58 部分リング状線源
60 部分リング状検出器
62 弓形の部分リング状線源
64 変更した部分リング状検出器
66 切欠き
68 螺旋状線源
70 螺旋状検出器
72 開口
74 セグメント
76 スロット
78 傾斜したリング状線源
80、82 線源及び検出器の対
84 変更したリング状検出器
86 開口
Claims (12)
- 撮像ボリュームの少なくとも一部分の周りに延在する少なくとも1つの静止型検出器(46)と、
前記少なくとも1つの静止型検出器(46)に近接して配置された少なくとも1つの静止型分布形X線源(30)と、
前記少なくとも1つの静止型検出器(46)を用いて三次元データを取得するために、前記少なくとも1つの静止型分布形X線源(30)内の1つ以上のエミッタをトリガするX線源制御装置(16)と、
を備え、
前記少なくとも1つの静止型検出器(46)及び前記少なくとも1つの静止型分布形X線源(30)は、画像再構成のための取得された三次元データの数学的完全さを向上させるために、前記少なくとも1つの静止型分布形X線源(30)が少なくとも2つの完全リング状線源(54)を含んでおり、
前記少なくとも1つの静止型検出器(46)は、一対のリング状検出器(52)を含んでおり、また前記少なくとも2つの完全リング状線源のうちの少なくとも1つのリング状線源(54)が前記一対のリング状検出器(52)の間に位置している、ことを特徴とする三次元静止型CTシステム(10)。 - 前記少なくとも1つの静止型検出器(46)は、2つ以上のリング状線源(54)の間に配置された1つ以上のリング状検出器(52)を含むことを特徴とする請求項1記載のシステム。
- 更に、画像再構成のための取得データの完全さを高めるために少なくともZ方向に延在する1つ又は複数の線状線源(56)を含んでいる請求項2に記載のシステム。
- 前記少なくとも1つの静止型分布形X線源(30)は少なくとも2つの完全リング状線源(54)を含むことを特徴とする請求項2記載のシステム。
- 前記2つ以上のリング状線源(54)は、前記静止型検出器(52)に直ぐ隣接して配置された少なくとも2つのリング状線源(54)と、前記2つ以上のリング状線源(のいずれかの側で隔たった位置に設けられた追加のリング状線源(54)とを含むことを特徴とする請求項2記載のシステム。
- 前記2つ以上のリング状線源(54)は、放射線を放出するための複数の間隔をあけて設けられたリング状線源(54)を含んでおり、
また前記少なくとも1つの静止型検出器(46)は、放射線を受け取るために前記間隔をあけて設けられたリング状線源の間に位置している複数のリング状検出器(52)を含むことを特徴とする請求項2記載のシステム。 - 前記システムは1つ以上の部分リング状線源(58)を更に含んでおり、
前記少なくとも1つの静止型検出器(46)は、2つ以上のリング状線源(54)の間に位置する1つ以上のリング状検出器(52)を含むと共に、前記1つ以上の部分リング状線源(58)を含むことを特徴とする請求項1記載のシステム。 - 前記少なくとも1つの静止型検出器(46)は、2つ以上のリング状線源(54)の間に位置する1つ以上のリング状検出器(52)を含んでおり、
前記1つ以上のリング状検出器(52)及び前記2つ以上のリング状線源(54)は、前記1つ以上のリング状検出器(52)が前記2つ以上のリング状線源(54)と共にテレスコープ式に動くことができるように、異なる直径を有している、請求項1記載のシステム。 - 撮像ボリュームの少なくとも一部分の周りに延在する少なくとも1つの静止型検出器(46)と、
前記少なくとも1つの静止型検出器(46)に近接して配置された少なくとも1つの静止型分布形X線源(30)と、
少なくともZ方向に延在する1つ以上の線状線源(56)と、
前記少なくとも1つの静止型検出器(46)を用いて三次元データを取得するために、前記少なくとも1つの静止型分布形X線源(30)内の1つ以上のエミッタをトリガするX線源制御装置(16)と、
を備え、
前記少なくとも1つの静止型検出器(46)、前記少なくとも1つの静止型分布形X線源(30)及び前記1つ以上の線状線源(56)により、画像再構成のための取得された三次元データの数学的完全さを向上させること、を特徴とする三次元静止型CTシステム(10)。 - 撮像ボリュームの少なくとも一部分の周りに延在する少なくとも1つの静止型リング状検出器(52)と、
前記少なくとも1つの静止型リング状検出器(52)の一方の側と反対の側とに交互に位置決めすることができ、前記少なくとも1つの静止型リング状検出器(52)へ向けて放射線を放出するように構成されている1つ以上の部分リング状線源(58)と、
前記少なくとも1つの静止型リング状検出器(52)を用いて三次元データを取得するために、前記1つ以上の部分リング状線源(58)内の1つ以上のエミッタをトリガするX線源制御装置(16)と、
を備え、
前記少なくとも1つの静止型リング状検出器(52)及び、前記1つ以上の部分リング状線源(58)は、画像再構成のための取得された三次元データの数学的完全さを向上させることを特徴とする三次元静止型CTシステム(10)。 - 撮像ボリュームの少なくとも一部分の周りに延在する少なくとも1つの静止型検出器(46)と、
前記少なくとも1つの静止型検出器(46)に近接して配置された少なくとも1つの静止型分布形X線源(30)と、
前記少なくとも1つの静止型検出器(46)を用いて三次元データを取得するために、前記少なくとも1つの静止型分布形X線源(30)内の1つ以上のエミッタをトリガするX線源制御装置(16)と、
を備え、
前記少なくとも1つの静止型検出器(46)及び前記少なくとも1つの静止型分布形X線源(30)は、画像再構成のための取得された三次元データの数学的完全さを向上させるために、
前記少なくとも1つの静止型検出器(46)は螺旋状検出器(70)を含んでおり、また前記少なくとも1つの静止型分布形X線源(30)は、前記螺旋状検出器(70)に隣接して配置された螺旋状線源(68)を含んでいること、を特徴とする三次元静止型CTシステム(10)。 - 更に、画像再構成のための取得データの完全さを高めるために,
少なくともZ方向に延在する1つ又は複数の線状線源(56)を含んでいる請求項10, 12のいずれか1項に記載のシステム。
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US52558703P | 2003-11-26 | 2003-11-26 | |
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US10/816,064 | 2004-04-01 | ||
US10/816,064 US7280631B2 (en) | 2003-11-26 | 2004-04-01 | Stationary computed tomography system and method |
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JP2005177469A5 JP2005177469A5 (ja) | 2009-12-17 |
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JP (1) | JP4759255B2 (ja) |
CN (2) | CN100591277C (ja) |
DE (1) | DE102004056590A1 (ja) |
NL (1) | NL1027596C2 (ja) |
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NL1027596C2 (nl) | 2005-11-15 |
NL1027596A1 (nl) | 2005-05-27 |
CN101480341A (zh) | 2009-07-15 |
CN100591277C (zh) | 2010-02-24 |
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US7280631B2 (en) | 2007-10-09 |
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