Multi-bed elastic motion correction

Patent metadata

Field	Value
Publication number	US-9730664-B2
Application number	US-201514672464-A
Country	US
Kind code	B2
Filing date	Mar 30, 2015
Priority date	Apr 14, 2014
Publication date	Aug 15, 2017
Grant date	Aug 15, 2017

Abstract

A set of first modality data (e.g., MR or CT) is provided. The set of first modality data comprises a plurality of mu-maps, a plurality of motion vectors and a plurality of gated data. Each of the mu-maps corresponds to one of the beds. A set of second modality data (e.g., PET/SPECT) is provided. The set of second modality data comprises a plurality of frames for each of the beds. Each of the plurality of frames is warped by one or more motion vectors of the plurality of motion vectors. A single-bed image is generated for each bed by summing the frames corresponding to the bed. A whole body image is generated by summing the single-bed images for each of the beds.

First claim

What is claimed is:

1. A method of processing data for medical imaging, the method comprising:
providing a first set of first modality data including a first mu-map, a first plurality of gated data, and a first plurality of motion vectors, wherein the first set of first modality data is generated by a first imaging modality of an imaging system;
providing a first set of second modality data including a first plurality of frames, wherein each of the first plurality of frames corresponds to one of the first plurality of attenuation correction maps, and wherein the first set of second modality data is generated by a second imaging modality of an imaging system;
warping the first plurality of frames by one or more motion vectors from the first plurality of motion vectors;
combining the first plurality of warped frames into a first single-bed image
providing a second set of first modality data including a second mu-map, a second plurality of motion vectors and a second plurality of gated data;
providing a second set of second modality data including a second plurality of frames, wherein each of the second plurality of frames corresponds to one or more of the second plurality of motion vectors;
warping the second plurality of frames by one or more motion vectors from the plurality of motion vectors;
combining the second plurality of warped frames into a single-bed image; and
combining the first single-bed image and the second single-bed image into a whole body image.

2. The method of claim 1 , wherein the first plurality of image frames comprise sinograms.

3. The method of claim 1 , wherein generating the first single-bed image and the second-single bed image comprises applying an expanded sensitivity term and summing the respective plurality of warped frames.

4. The method of claim 1 , comprising:
generating a first plurality of attenuation maps from the first set of modality data, wherein each of the first plurality of attenuation maps corresponds to a gate in the first plurality of gated data; and
warping the first plurality of frames by a corresponding attenuation map from the first plurality of attenuation maps.

5. The method of claim 4 , wherein the first plurality of attenuation correction maps are generated by warping an ungated attenuation map by a plurality of elongated motion vectors corresponding to respiratory motion derived from the first set of first modality data.

6. The method of claim 1 , wherein the whole body image is generated according to the equation:

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Assignees

• Siemens Medical Solutions Usa Inc

Inventors

• Bal Girish
• Fenchel Matthias
• Howe William Curtis
• Kehren Frank

Classifications

• A61B5/704

  Tables · CPC title

• A61B5/055

  involving electronic [EMR] or nuclear [NMR] magnetic resonance, e.g. magnetic resonance imaging · CPC title

• A61B6/5205

  involving processing of raw data to produce diagnostic data · CPC title

• A61B6/5288

  involving retrospective matching to a physiological signal · CPC title

• A61B6/5247

  combining images from an ionising-radiation diagnostic technique and a non-ionising radiation diagnostic technique, e.g. X-ray and ultrasound · CPC title