Tomography scanner with axially discontinuous detector array

a detector array and tomography technology, applied in the field of tomography scanners, can solve the problems of inferior quality, i, containing artifacts or both, and prior art methods possess significant practical disadvantages

Inactive Publication Date: 2005-05-26
TRIDENT IMAGING
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  • Abstract
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Benefits of technology

[0010] The present invention avoids the need for specially designed array assemblies having axially continuous detector arrays by adapting existing image reconstruction methods to the presence of axial gaps in a detector array, by mechanical movement of the imaging target relative to an axially discontinuous de

Problems solved by technology

It has been generally believed that images reconstructed without dense and uniform sampling, i.e. without a continuous axial and circumferential distribution of scintillating material, would be of inferior quality, would contain artifacts or both.
While a continuous cylindrical array of scintillation crystals surrounding an imaging target is an effective way to intercept annihilation radiation from an imaging target, prior art methods possess significant practical disadvantages.
For example, the nee

Method used

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  • Tomography scanner with axially discontinuous detector array

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Embodiment Construction

[0027] Tomography and tomographic images refer to images that together portray in three dimensions some property of an object being imaged. Commonly, such images may be in the form of a sequence of consecutive two dimensional transverse sections closely spaced along the axis of a tomography scanner to span the entire axial field-of-view of the scanner and the object therein. A “property” portray in such images can be, but it not limited to, the spatial distribution and frequency of occurrence of positron annihilation sites in the object, and a “property” may also refer to the distribution of attenuation coefficients, the location and amount of a light emitting compound distributed within the object, the amount and location of contrast material introduced into the object, and other such processes and phenomenon.

[0028] The term “detector ring” as used herein means an annular structure surrounding an imaging target or body formed of detector material that is responsive to incident rad...

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Abstract

A tomography scanner has intentionally designed, well defined gaps between detector rings with image reconstruction obtained with the use of conventional tomography data processing. The scanner is particularly advantageous as a small animal PET scanner.

Description

CROSS REFERENCE TO RELATED PATENT APPLICATION [0001] This application claims priority from prior provisional patent application Ser. No. 60 / 504,321, filed Sep. 18, 2003, the entire disclosure of which is incorporated herein by reference.BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] The present invention pertains to tomography scanners and, more particularly, to positron emission tomography (PET) scanners designed for imaging small animals or humans. [0004] 2. Brief Discussion of the Related Art [0005] Small animal PET scanners are commonly used in research facilities and, desirably, have high spatial resolution and uniformity and high sensitivity as described in “Molecular Imaging of Small Animals with Dedicated PET Tomographs,” Chatziioannou, Arion F., European Journal of Nuclear Medicine, Vol. 29, No. 1, January 2002. Commercial examples of such small animal PET scanners are the Concorde R4 and P4 “microPET” small animal PET scanners described in “Performance...

Claims

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Application Information

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IPC IPC(8): G01T1/166G21K
CPCG01T1/2985G01T1/1644G01T1/2008
Inventor VAQUERO, JUAN JOSESEIDEL, JURGENGREEN, MICHAEL V.
Owner TRIDENT IMAGING
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