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Method and system for high resolution nutated slice reconstruction using quarter detector offset
US9095259B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9095259-B2 |
| Application number | US-200913508859-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 4, 2009 |
| Priority date | Dec 4, 2009 |
| Publication date | Aug 4, 2015 |
| Grant date | Aug 4, 2015 |
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Abstract
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A method and system are provided for generating high resolution CT images. The NSR# method improves on the AMPR method, by increasing the in-plane image resolution of CT scanners, in the helical scanning mode. The provided method uses the quarter detector offset and interleaving of complementary data to achieve in plane image resolution that is similar to the high resolution axial scanning mode utilizing quarter detector offset and interleaving. The method includes several ways of choosing the data to be interleaved, like NSR# with two planes, NSR# with 3 planes, NSR# with multiple planes. The interleaved data are used to create high resolution tilted slices. The NSR# method optimizes the untilting filter to create a mix of high and low resolution tilted slices to achieve the desired in-plane image resolution-image artifact balance required for the imaging task. In one embodiment in the untilting process one may use only high resolution tilted slices, for maximum resolution benefit. In another embodiment one may mix high resolution tilted slices with standard resolution tilted slices resulting from data that did not go through interleaving. This creates unfilled slices of higher resolution than the standard and with lower artifacts. In another embodiment for scans with pitch lower than ⅔ one may reduce the collimation to reduce the dose to the patient.
First claim
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What is claimed is: 1. A helical CT scanner for scanning an object, comprising: an x-ray source constructed so as to define a focal spot, and a detector array comprising a plurality of detectors positioned to rotate with the source about an axis of rotation, wherein the source and detector array are arranged to rotate about a rotation axis with the object moving relative to and between the source and detector array in a direction parallel to the rotation axis during a helical scan…
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Physics · mapped topic
Human Necessities · mapped topic
Physics · mapped topic
- A61B6/032Primary
Human Necessities · mapped topic
Physics · mapped topic
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- What does patent US9095259B2 cover?
- A method and system are provided for generating high resolution CT images. The NSR# method improves on the AMPR method, by increasing the in-plane image resolution of CT scanners, in the helical scanning mode. The provided method uses the quarter detector offset and interleaving of complementary data to achieve in plane image resolution that is similar to the high resolution axial scanning mode…
- Who is the assignee on this patent?
- Roshi Aleksander, Ulker Karbeyaz Basak, Rozas David, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification A61B6/032. Mapped technology areas include Human Necessities.
- When was this patent published?
- Publication date Tue Aug 04 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).