CN1146359C - 计算机层析x射线摄影仪 - Google Patents
计算机层析x射线摄影仪 Download PDFInfo
- Publication number
- CN1146359C CN1146359C CNB951161520A CN95116152A CN1146359C CN 1146359 C CN1146359 C CN 1146359C CN B951161520 A CNB951161520 A CN B951161520A CN 95116152 A CN95116152 A CN 95116152A CN 1146359 C CN1146359 C CN 1146359C
- Authority
- CN
- China
- Prior art keywords
- computer
- ray
- tomographs
- detector
- ray sources
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
- A61B6/02—Devices for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
- A61B6/03—Computerised tomographs
- A61B6/032—Transmission computed tomography [CT]
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
- 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
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- 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]
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2223/00—Investigating materials by wave or particle radiation
- G01N2223/40—Imaging
- G01N2223/419—Imaging computed tomograph
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2223/00—Investigating materials by wave or particle radiation
- G01N2223/60—Specific applications or type of materials
- G01N2223/612—Specific applications or type of materials biological material
Abstract
本发明涉及一种螺旋扫描式计算机层析X射线摄影仪,其在X射线功率高和扫描时间短的情况下可明显地改善沿进给方向进行的扫描。存在多个X射线发射器(5、6、7),其焦点对称地处在一个与测量场(1)同心的圆(17)上。探测器可由一个固定的探测器环(13)或多个共同旋转的探测器组成。每个探测器可由一行或多行构成。X射线发射器(5、6、7)连续旋转,与此同时,在这些X射线发射器(5、6、7)和病人检查台(3)之间完成一个沿检查台纵向的相对运动。
Description
整体的螺旋扫描技术在计算机层析X射线摄影中具有越来越重要的意义。在此方面业已公知的是,把一个X射线发射器和一个射线探测器组成的摄影单元设在一个扫描框上并使扫描框转动360°角以上,同时使上面躺有病人的检查台沿其纵向进行通过被扫描的测量场的移动(US 5 291 402)。
本发明的目的在于提供一种用于对检查目标进行螺旋扫描的计算机层析X射线摄影仪,使得在X射线功率高及摄影时间缩短的情况下,得到比现有技术好得多的螺旋扫描。
本发明的目的通过一种权利要求1所述特征的,用以对病人进行螺旋扫描的计算机层析X射线摄影仪来实现。该计算机层析X射线摄影仪具有多个X射线发射器,这些X射线发射器的焦点对称地位于一个与测量场同心的圆上并且这些X射线发射器可绕系统轴线连续旋转,与此同时,在X射线发射器和病人检查台之间沿病人检查台纵向有一相对运动发生。
下面借助附图所示实施例对本发明作详细说明。附图所示为:
图1为本发明的计算机层析X射线摄影仪的主要构成部分,
图2为图1所示计算机层析X射线摄影仪的扫描曲线图,
图3和4为传统的螺旋扫描的断层轮廓和图2所示的扫描的断层轮廓。
在图1中示出了一个测量场1,一个病人2在该测量场中躺在一个病人检查台3上。为了形成X射线断层照片,病人围绕一个垂直于绘图平面伸展的轴线4被3个X射线发射器5、6、7扫描。为此,X射线发射器5、6、7互成120°对称地设在一个扫描框8上,该扫描框在一个电机9的驱动下连续转动。X射线发射器5、6、7发射出扇形X射线束10、11、12。这些X射线束穿透测量场1和病人2后撞击到一个固定的探测器环13上。探测器也可由多个在扫描框8上共同转动的探测器构成,其中,分别有一个探测器位于一个X射线发射器的对面。每个探测器由一排或多排探测器元件组成。探测器元件的输出信号以公知的方式输往一个计算机,该计算机从中计算出病人2的全部被透射区域的图象并在一个监视器上显示。在扫描框8连同X射线发射器5、6、7的旋转过程中,病人检查台3沿其纵向向前推进,穿过测量场,使病人2整体受到扫描。
图2示出了三条轨迹14、15、16。在病人检查台3固定并且扫描框8沿系统轴线4的方向运动的条件下,X射线发射器5、6、7的焦点在这3条轨迹14、15、16上运动。这些焦点位于一个与探测器环13同心的圆17上。
在实施例中描述了一个具有固定的探测器环13和多个,即三个设在回转部分上的X射线发射器5、6、7的螺旋扫描式计算机层析X射线摄影仪。与现有技术相比,该螺旋扫描式计算机层析X射线摄影仪具有如下优点:
1)用多个,最好是三个X射线发射器进行的螺旋扫描提供了高度的适应性。当每转360°检查台进给一个断层厚度(螺距=1)时,得到沿进给方向的好3倍的扫描并从而避免了螺旋赝象(Spiralart-efakte)。计算的截面图象(Schnittbilder)的断层轮廓和量子可以回溯地在一较宽范围内变化。在最适宜的情况下,断层轮廓几乎全等于一个单个断层的断层轮廓(在图4中用虚线表示的)。与此相反,图3示出了在仅用一个X射线发射器时测出的断层轮廓与一单个断层的断层轮廓两者间的巨大偏差。量子数较多的断层具有一个相应较宽的、但接近梯形的轮廓并且显示出的部分体积赝象比一个宽度相同的单个断层所显示的要少。沿进给方向的更精确的扫描大大改善了螺旋内插并保证了图象噪扰和空间分辨率在象平面上的均匀分布。通过应用多个平行的探测器组,扫描可得到进一步改善。沿进给方向对检查目标进行精确的扫描还使测量的原始数据得以扩展并能比机械式准直更好地得到一个胶片感光度轮廓。由此得到一个沿三维方向几乎均匀的分辨率分布。
2)X射线功率等于传统仪器的多倍(如在应用三个X射线发射器时为三倍)并与一个电子束发射机(EBT)的或一个具有多行探测器的传统机器的有效X射线功率(可利用的象量子)相当。
3)一个图象的有效测量时间只等于目前的摄影时间的几分之一,如0.5秒的三分之一,即360°数据采集只需要0.17秒,部分扫描的时间小于100毫秒。这些有效测量时间完全可与EBT相比并明显优于所有的传统仪器。同时,在不增加测量数据量的情况下,扫描时间可任意延长并可与每个图象的必要剂量相适应。
在需要时(大体积的,如肺的薄断层摄影)可提高螺距,在螺距=3时,可用三分之一的时间或对三倍大的体积实现目前的螺旋扫描式计算机层析X射线摄影仪所完成的扫描和图象质量。
平面的摄影几何避免了扇形束赝象和相应高的附加计算量。在应用多个探测器组的仪器的情况下,可把扇形角选得很小。为螺旋CT而建议的计算机层析X射线摄影仪的图象质量不仅优于EBT机,而且优于传统的、具有多行探测器的仪器。计算机层析X射线摄影仪的一个固定的探测器环可同时多重,如三重使用;附加的设备投资费用则限在两个具有发生器的X射线发射器上。
Claims (5)
1、用以对病人(2)进行螺旋扫描的计算机层析X射线摄影仪,其特征在于,具有多个X射线发射器(5、6、7),这些X射线发射器的焦点对称地位于一个与测量场(1)同心的圆(17)上并且这些X射线发射器可绕系统轴线(4)连续回转,与此同时,在X射线发射器(5、6、7)和病人检查台(3)之间沿病人检查台的纵向有一相对运动发生。
2、根据权利要求1所述的计算机层析X射线摄影仪,其特征在于,具有一个围绕测量场(1)的、固定的探测器环(3)。
3、根据权利要求1所述的计算机层析X射线摄影仪,其特征在于,具有多个围绕测量场(1)的,共同旋转的探测器。
4、根据权利要求2所述的计算机层析X射线摄影仪,其特征在于,固定的探测器环(13)由多个组成。
5、根据权利要求3所述的计算机层析X射线摄影仪,其特征在于,共同旋转的探测器分别由多个组成。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEP4436688.4 | 1994-10-13 | ||
DE4436688A DE4436688A1 (de) | 1994-10-13 | 1994-10-13 | Computertomograph |
Publications (2)
Publication Number | Publication Date |
---|---|
CN1130498A CN1130498A (zh) | 1996-09-11 |
CN1146359C true CN1146359C (zh) | 2004-04-21 |
Family
ID=6530727
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CNB951161520A Expired - Fee Related CN1146359C (zh) | 1994-10-13 | 1995-10-10 | 计算机层析x射线摄影仪 |
Country Status (4)
Country | Link |
---|---|
US (1) | US5604778A (zh) |
JP (1) | JP3987594B2 (zh) |
CN (1) | CN1146359C (zh) |
DE (1) | DE4436688A1 (zh) |
Families Citing this family (65)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5966422A (en) * | 1992-07-20 | 1999-10-12 | Picker Medical Systems, Ltd. | Multiple source CT scanner |
US6246784B1 (en) | 1997-08-19 | 2001-06-12 | The United States Of America As Represented By The Department Of Health And Human Services | Method for segmenting medical images and detecting surface anomalies in anatomical structures |
DE19802405B4 (de) * | 1998-01-22 | 2004-07-08 | Siemens Ag | Röntgendiagnostikeinrichtung mit einem Computertomographen |
US6154521A (en) * | 1998-10-26 | 2000-11-28 | Picker International, Inc. | Gyrating anode x-ray tube |
US6208706B1 (en) | 1998-10-26 | 2001-03-27 | Picker International, Inc. | Method and apparatus to increase the operational time of a tomographic scanner |
JP2002095655A (ja) * | 2000-09-26 | 2002-04-02 | Shimadzu Corp | Ct装置 |
AU2000275526A1 (en) * | 2000-09-28 | 2002-04-08 | Philips Medical Systems Technologies Ltd. | Ct scanner for time-coherent large coverage |
US7963695B2 (en) | 2002-07-23 | 2011-06-21 | Rapiscan Systems, Inc. | Rotatable boom cargo scanning system |
US8275091B2 (en) | 2002-07-23 | 2012-09-25 | Rapiscan Systems, Inc. | Compact mobile cargo scanning system |
US7260250B2 (en) * | 2002-09-30 | 2007-08-21 | The United States Of America As Represented By The Secretary Of The Department Of Health And Human Services | Computer-aided classification of anomalies in anatomical structures |
US6873677B2 (en) * | 2003-04-18 | 2005-03-29 | Leon Kaufman | Method and device for improving time resolution of an imaging device |
US9208988B2 (en) | 2005-10-25 | 2015-12-08 | Rapiscan Systems, Inc. | Graphite backscattered electron shield for use in an X-ray tube |
US10483077B2 (en) | 2003-04-25 | 2019-11-19 | Rapiscan Systems, Inc. | X-ray sources having reduced electron scattering |
GB0903198D0 (en) * | 2009-02-25 | 2009-04-08 | Cxr Ltd | X-Ray scanners |
US8451974B2 (en) | 2003-04-25 | 2013-05-28 | Rapiscan Systems, Inc. | X-ray tomographic inspection system for the identification of specific target items |
GB0309374D0 (en) * | 2003-04-25 | 2003-06-04 | Cxr Ltd | X-ray sources |
US8837669B2 (en) | 2003-04-25 | 2014-09-16 | Rapiscan Systems, Inc. | X-ray scanning system |
US7949101B2 (en) | 2005-12-16 | 2011-05-24 | Rapiscan Systems, Inc. | X-ray scanners and X-ray sources therefor |
US8223919B2 (en) | 2003-04-25 | 2012-07-17 | Rapiscan Systems, Inc. | X-ray tomographic inspection systems for the identification of specific target items |
GB0525593D0 (en) * | 2005-12-16 | 2006-01-25 | Cxr Ltd | X-ray tomography inspection systems |
GB0309387D0 (en) * | 2003-04-25 | 2003-06-04 | Cxr Ltd | X-Ray scanning |
GB0309383D0 (en) | 2003-04-25 | 2003-06-04 | Cxr Ltd | X-ray tube electron sources |
US9113839B2 (en) | 2003-04-25 | 2015-08-25 | Rapiscon Systems, Inc. | X-ray inspection system and method |
GB0309379D0 (en) * | 2003-04-25 | 2003-06-04 | Cxr Ltd | X-ray scanning |
US8094784B2 (en) * | 2003-04-25 | 2012-01-10 | Rapiscan Systems, Inc. | X-ray sources |
GB0309371D0 (en) * | 2003-04-25 | 2003-06-04 | Cxr Ltd | X-Ray tubes |
US8243876B2 (en) | 2003-04-25 | 2012-08-14 | Rapiscan Systems, Inc. | X-ray scanners |
GB0812864D0 (en) | 2008-07-15 | 2008-08-20 | Cxr Ltd | Coolign anode |
US6928141B2 (en) | 2003-06-20 | 2005-08-09 | Rapiscan, Inc. | Relocatable X-ray imaging system and method for inspecting commercial vehicles and cargo containers |
JP4130428B2 (ja) * | 2004-09-02 | 2008-08-06 | ザイオソフト株式会社 | 画像処理方法及び画像処理プログラム |
JP2006187453A (ja) * | 2005-01-06 | 2006-07-20 | Ge Medical Systems Global Technology Co Llc | X線ct装置 |
EP1865853A2 (en) * | 2005-02-24 | 2007-12-19 | Philips Intellectual Property & Standards GmbH | Computer tomography apparatus with multiple x-ray radiation sources |
US7471764B2 (en) | 2005-04-15 | 2008-12-30 | Rapiscan Security Products, Inc. | X-ray imaging system having improved weather resistance |
DE602006018934D1 (de) * | 2005-07-08 | 2011-01-27 | Wisconsin Alumni Res Found | Rückprojektions-rekonstruktionsverfahren für ct-bildgebung |
JP5167125B2 (ja) * | 2005-07-08 | 2013-03-21 | ウイスコンシン アラムナイ リサーチ ファウンデーシヨン | アンダーサンプリングされたmriの限定的な逆投影再構成法 |
JP5123192B2 (ja) * | 2005-09-22 | 2013-01-16 | ウイスコンシン アラムナイ リサーチ ファウンデーシヨン | 機能的磁気共鳴イメージング用の、画像の取得及び再構成の方法 |
US7408347B2 (en) * | 2005-09-22 | 2008-08-05 | Wisconsin Alumni Research Foundation | Highly constrained magnetic resonance spectroscopy image reconstruction method |
EP1927010B1 (en) * | 2005-09-22 | 2016-01-06 | Wisconsin Alumni Research Foundation | Highly constrained reconstruction of motion encoded mr images |
WO2007038206A1 (en) * | 2005-09-22 | 2007-04-05 | Wisconsin Alumni Research Foundation | Highly constrained backprojection reconstruction in diffusion weighted mri |
EP1927009A1 (en) * | 2005-09-22 | 2008-06-04 | Wisconsin Alumni Research Foundation | Reconstruction of images of the beating heart using a highly constrained backprojection |
US9046465B2 (en) | 2011-02-24 | 2015-06-02 | Rapiscan Systems, Inc. | Optimization of the source firing pattern for X-ray scanning systems |
WO2007131160A2 (en) * | 2006-05-04 | 2007-11-15 | Xoran Technologies, Inc. | Ct scanner with helical path source |
CN101071110B (zh) * | 2006-05-08 | 2011-05-11 | 清华大学 | 一种基于螺旋扫描立体成像的货物安全检查方法 |
CN101071111B (zh) | 2006-05-08 | 2011-05-11 | 清华大学 | 一种多视角航空集装箱安全检查系统及方法 |
EP1959397B1 (en) * | 2007-02-19 | 2019-08-07 | Wisconsin Alumni Research Foundation | Iterative HYPR medical image reconstruction |
EP1959396B1 (en) * | 2007-02-19 | 2012-01-18 | Wisconsin Alumni Research Foundation | Localized and highly constrained image reconstruction method |
US20090184261A1 (en) * | 2008-01-21 | 2009-07-23 | Moshe Ein-Gal | Imaging with a plurality of sources to a common detector |
GB0803644D0 (en) | 2008-02-28 | 2008-04-02 | Rapiscan Security Products Inc | Scanning systems |
GB0803641D0 (en) | 2008-02-28 | 2008-04-02 | Rapiscan Security Products Inc | Scanning systems |
GB0809110D0 (en) | 2008-05-20 | 2008-06-25 | Rapiscan Security Products Inc | Gantry scanner systems |
GB0816823D0 (en) | 2008-09-13 | 2008-10-22 | Cxr Ltd | X-ray tubes |
GB0901338D0 (en) | 2009-01-28 | 2009-03-11 | Cxr Ltd | X-Ray tube electron sources |
US8483351B2 (en) * | 2009-10-28 | 2013-07-09 | Virginia Tech Intellectual Properties, Inc. | Cardiac computed tomography methods and systems using fast exact/quasi-exact filtered back projection algorithms |
US9271689B2 (en) * | 2010-01-20 | 2016-03-01 | General Electric Company | Apparatus for wide coverage computed tomography and method of constructing same |
US9218933B2 (en) | 2011-06-09 | 2015-12-22 | Rapidscan Systems, Inc. | Low-dose radiographic imaging system |
US8620404B2 (en) | 2011-07-26 | 2013-12-31 | Wisconsin Alumni Research Foundation | System and method of high-frame rate, time-resolved, three-dimensional magnetic resonance angiograpy |
KR102167245B1 (ko) | 2013-01-31 | 2020-10-19 | 라피스캔 시스템스, 인코포레이티드 | 이동식 보안검사시스템 |
US9490099B2 (en) | 2014-08-20 | 2016-11-08 | Wisconsin Alumni Research Foundation | System and method for multi-source X-ray-based imaging |
TWI616896B (zh) * | 2015-06-18 | 2018-03-01 | 緯創資通股份有限公司 | X光發射裝置 |
CN105784737B (zh) * | 2016-03-29 | 2021-06-22 | 清华大学 | 集装箱ct检查系统 |
US10585206B2 (en) | 2017-09-06 | 2020-03-10 | Rapiscan Systems, Inc. | Method and system for a multi-view scanner |
KR101914476B1 (ko) * | 2017-10-31 | 2018-11-02 | 주식회사 웨어로보 | 나선형 레일을 이용한 피사체 촬영 시스템 |
US11212902B2 (en) | 2020-02-25 | 2021-12-28 | Rapiscan Systems, Inc. | Multiplexed drive systems and methods for a multi-emitter X-ray source |
US11551903B2 (en) | 2020-06-25 | 2023-01-10 | American Science And Engineering, Inc. | Devices and methods for dissipating heat from an anode of an x-ray tube assembly |
CN112964738B (zh) * | 2021-01-29 | 2022-11-22 | 山东大学 | 一种工业ct快速扫描系统及方法 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2614083B2 (de) * | 1976-04-01 | 1979-02-08 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Röntgenschichtgerät zur Herstellung von Transversalschichtbildern |
DE2729833A1 (de) * | 1977-07-01 | 1979-01-18 | Siemens Ag | Roentgen-schichtbild-aufnahmegeraet |
US4196352A (en) * | 1978-04-28 | 1980-04-01 | General Electric Company | Multiple purpose high speed tomographic x-ray scanner |
DE2951222A1 (de) * | 1979-12-19 | 1981-06-25 | Siemens AG, 1000 Berlin und 8000 München | Roentgenschichtgeraet zur herstellung von transversalschichtbildern |
US5068882A (en) * | 1990-08-27 | 1991-11-26 | General Electric Company | Dual parallel cone beam circular scanning trajectories for reduced data incompleteness in three-dimensional computerized tomography |
US5454019A (en) * | 1991-03-15 | 1995-09-26 | Hitachi, Ltd. | Computed tomography system |
US5375156A (en) * | 1992-03-31 | 1994-12-20 | Siemens Medical Systems, Inc. | Method and apparatus for 3-D computer tomography |
US5291402A (en) * | 1992-08-07 | 1994-03-01 | General Electric Company | Helical scanning computed tomography apparatus |
US5430783A (en) * | 1992-08-07 | 1995-07-04 | General Electric Company | Reconstruction method for helical scanning computed tomography apparatus with multi-row detector array employing overlapping beams |
-
1994
- 1994-10-13 DE DE4436688A patent/DE4436688A1/de not_active Ceased
-
1995
- 1995-10-10 CN CNB951161520A patent/CN1146359C/zh not_active Expired - Fee Related
- 1995-10-11 US US08/541,175 patent/US5604778A/en not_active Expired - Lifetime
- 1995-10-12 JP JP26434895A patent/JP3987594B2/ja not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JP3987594B2 (ja) | 2007-10-10 |
DE4436688A1 (de) | 1996-04-25 |
CN1130498A (zh) | 1996-09-11 |
US5604778A (en) | 1997-02-18 |
JPH08299322A (ja) | 1996-11-19 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN1146359C (zh) | 计算机层析x射线摄影仪 | |
US7072436B2 (en) | Volumetric computed tomography (VCT) | |
US4150293A (en) | Tomographic apparatus for producing transverse layer images | |
US7145981B2 (en) | Volumetric computed tomography (VCT) | |
US4989225A (en) | Cat scanner with simultaneous translation and rotation of objects | |
US5291402A (en) | Helical scanning computed tomography apparatus | |
US7016456B2 (en) | Method and apparatus for calibrating volumetric computed tomography systems | |
US4736396A (en) | Tomosynthesis using high speed CT scanning system | |
US6574296B2 (en) | Computer tomography unit and method for operating same | |
JPH0614912A (ja) | コンピュータ断層撮影システムで画像を作成する方法と装置 | |
US5510622A (en) | X-ray detector array with reduced effective pitch | |
JPH04231940A (ja) | 物体を撮像するct装置 | |
US5469486A (en) | Projection domain reconstruction method for helical scanning computed tomography apparatus with multi-column detector array employing overlapping beams | |
US5400379A (en) | Multi-slice x-ray CT using a detector mask | |
US6925141B2 (en) | Method for imaging in the computer tomography of a periodically moved object to be examined and CT device for carrying out the method | |
JPH0728862B2 (ja) | Ct装置 | |
JP2000051198A (ja) | 円錐状放射線ビ―ム及び螺旋状走査軌道を用いるコンピュ―タ断層撮影装置 | |
CN100415171C (zh) | 使扫描图像中的模糊最小化的方法和设备 | |
JP2006516433A (ja) | コーンビームctのためのボクセル駆動されるスパイラル再構成方法 | |
JP2003180676A (ja) | コンピュータトモグラフィ用の像再構成方法 | |
US7688939B2 (en) | Object rotation for CT data acquisition | |
US20040146137A1 (en) | Method for computer tomography and computer tomography device for carrying out the method | |
US20060083345A1 (en) | Method and apparatus for reconstruction of tilted cone beam data | |
US5933517A (en) | Installation and process for the reconstruction of three-dimensional images | |
US6307908B1 (en) | System and method for data interpolation in a multislice x-ray computed tomography system |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
C17 | Cessation of patent right | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20040421 Termination date: 20091110 |