Adjustable photon detection systems for multi-slice X-ray computed tomography systems
OwnerZhengrong Yinginventor
Life of this patent
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Abstract
An Adjustable Photon Detection System (APDS) for multi-slice X-ray CT systems and a multi-slice X-ray CT system using the APDS are disclosed; wherein the APDS can be adjusted to be aligned to different X-ray source positions; wherein the multi-slice X-ray CT system comprises one or more X-ray sources, and one or more APDS; wherein the multi-slice X-ray CT system may also include a detector position calculator for calculating effective detector positions and a detector position corrector for correcting projection data using calculated effective detector positions.
Claims17
An Adjustable Photon Detection System (APDS) for a multi-slice X-ray Computed Tomography (CT) system, wherein said X-ray CT system includes one X-ray source, wherein the center of rotation of said X-ray CT system is iso-center, wherein the direction from said iso-center to the focal spot of said X-ray source is Y-axis, and Z-axis is the axis of rotation, and the direction perpendicular to the Y-axis and Z-axis is X-axis, comprising:
- A. A plurality of X-ray detector modules for receiving and converting X-ray photons;
- wherein each detector module comprises a plurality of detector elements;
- B. A support structure for mounting said X-ray detector modules, wherein all of said detector modules focus on a first position;
- C. A plurality of anti-scatter plates, placed on top of said detector modules;
- wherein all of said anti-scatter plates are aligned to a second position;
- wherein said second position is different from said first position;
- and,
- D. A plurality of curved anti-scatter toothed metal strips with slots that are configured to align all of said anti-scatter plates to said second position, wherein said curved anti-scatter toothed metal strips are placed on said support structure and are not part of said support structure.
A multi-slice X-ray Computed Tomography (CT) system for generating CT images for objects to be imaged comprising:
- A. A rotatable gantry;
- B. An X-ray source mounted on said rotatable gantry for generating X-ray beams to pass through said objects;
- and
- C. An Adjustable Photon Detection System (APDS) mounted on said rotatable gantry to the opposite side of said X-ray source, for receiving said X-ray beams, and for generating a CT data set corresponding to said objects;
- wherein said APDS comprising:
- I. A plurality of X-ray detector modules for receiving and converting X-ray photons;
- wherein each detector module comprises a plurality of detector elements;
- II. A support structure for mounting said X-ray detector modules, wherein all of said detector modules focus on a first position;
- III. A plurality of anti-scatter plates, placed on top of said detector modules;
- wherein all of said anti-scatter plates are aligned to a second position;
- wherein said second position is different from said first position;
- and,
- IV. A plurality of curved anti-scatter toothed metal strips with slots that are configured to align all of said anti-scatter plates to said second position, wherein said curved anti-scatter toothed metal strips are placed on said support structure and are not part of said support structure;
- wherein the focal spot of said X-ray source is at said second position;
- wherein the center of rotation of said X-ray CT system is iso-center, wherein the direction from said iso-center to the focal spot of said X-ray source is Y-axis, and Z-axis is the axis of rotation, and the direction perpendicular to the Y-axis and Z-axis is X-axis.
Dependencies are inferred from the claim text.