Simultaneous CT and SPECT tomography using CZT detectors

Paulus, Michael J; Sari-Sarraf, Hamed; Simpson, Michael L

Title: Simultaneous CT and SPECT tomography using CZT detectors

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Abstract

A method for simultaneous transmission x-ray computed tomography (CT) and single photon emission tomography (SPECT) comprises the steps of: injecting a subject with a tracer compound tagged with a .gamma.-ray emitting nuclide; directing an x-ray source toward the subject; rotating the x-ray source around the subject; emitting x-rays during the rotating step; rotating a cadmium zinc telluride (CZT) two-sided detector on an opposite side of the subject from the source; simultaneously detecting the position and energy of each pulsed x-ray and each emitted .gamma.-ray captured by the CZT detector; recording data for each position and each energy of each the captured x-ray and .gamma.-ray; and, creating CT and SPECT images from the recorded data. The transmitted energy levels of the x-rays lower are biased lower than energy levels of the .gamma.-rays. The x-ray source is operated in a continuous mode. The method can be implemented at ambient temperatures.

Inventors:

Paulus, Michael J ^[1]; Sari-Sarraf, Hamed ^[2]; Simpson, Michael L ^[1]; Britton, Jr., Charles L. ^[3]

Knoxville, TN
Lubbock, TX
(Alcoa, TN)

Issue Date:: 2002-01-01

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

OSTI Identifier:: 874490

Patent Number(s):: 6399951

Assignee:: UT-Battelle, LLC (Oak Ridge, TN)

Patent Classifications (CPCs):: G - PHYSICS G01 - MEASURING G01T - MEASUREMENT OF NUCLEAR OR X-RADIATION

A - HUMAN NECESSITIES A61 - MEDICAL OR VETERINARY SCIENCE A61B - DIAGNOSIS

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G - PHYSICS G01 - MEASURING G01T - MEASUREMENT OF NUCLEAR OR X-RADIATION
G01T1/1648 - {Ancillary equipment for scintillation cameras, e.g. reference markers, devices for removing motion artifacts, calibration devices

A - HUMAN NECESSITIES A61 - MEDICAL OR VETERINARY SCIENCE A61B - DIAGNOSIS
A61B6/508 - {for non-human patients}
A61B6/482 - {involving multiple energy imaging}
A61B6/4035 - {the source being combined with a filter or grating
A61B6/4092 - {for producing synchrotron radiation}
A61B6/5235 - {combining images from the same or different radiation imaging techniques, e.g. PET and CT}
A61B6/037 - {Emission tomography
A61B6/032 - {Transmission computed tomography [CT]}
A61B6/4417 - {related to combined acquisition of different diagnostic modalities}
A61B6/4241 - {using energy resolving detectors, e.g. photon counting

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DOE Contract Number:: AC05-96OR22464

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: simultaneous; tomography; czt; detectors; method; transmission; x-ray; computed; single; photon; emission; steps; injecting; subject; tracer; compound; tagged; gamma-ray; emitting; nuclide; directing; source; rotating; x-rays; step; cadmium; zinc; telluride; two-sided; detector; opposite; simultaneously; detecting; position; energy; pulsed; emitted; captured; recording; data; creating; images; recorded; transmitted; levels; biased; gamma-rays; operated; continuous; mode; implemented; ambient; temperatures; ambient temperature; x-ray source; energy level; single photon; photon emission; computed tomography; simultaneous transmission; /250/

Citation Formats


                    Paulus, Michael J, Sari-Sarraf, Hamed, Simpson, Michael L, and Britton, Jr., Charles L. Simultaneous CT and SPECT tomography using CZT detectors.  United States: N. p., 2002. 
        Web.

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                    Paulus, Michael J, Sari-Sarraf, Hamed, Simpson, Michael L, & Britton, Jr., Charles L. Simultaneous CT and SPECT tomography using CZT detectors.  United States.

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                    Paulus, Michael J, Sari-Sarraf, Hamed, Simpson, Michael L, and Britton, Jr., Charles L. Tue .  
        "Simultaneous CT and SPECT tomography using CZT detectors".  United States.  https://www.osti.gov/servlets/purl/874490.

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@article{osti_874490,

  title        = {Simultaneous CT and SPECT tomography using CZT detectors},

  author       = {Paulus, Michael J and Sari-Sarraf, Hamed and Simpson, Michael L and Britton, Jr., Charles L.},

  abstractNote = {A method for simultaneous transmission x-ray computed tomography (CT) and single photon emission tomography (SPECT) comprises the steps of: injecting a subject with a tracer compound tagged with a .gamma.-ray emitting nuclide; directing an x-ray source toward the subject; rotating the x-ray source around the subject; emitting x-rays during the rotating step; rotating a cadmium zinc telluride (CZT) two-sided detector on an opposite side of the subject from the source; simultaneously detecting the position and energy of each pulsed x-ray and each emitted .gamma.-ray captured by the CZT detector; recording data for each position and each energy of each the captured x-ray and .gamma.-ray; and, creating CT and SPECT images from the recorded data. The transmitted energy levels of the x-rays lower are biased lower than energy levels of the .gamma.-rays. The x-ray source is operated in a continuous mode. The method can be implemented at ambient temperatures.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2002},

  month        = {1}

}

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