Image data processing

A technology of image data and volumetric image data, applied in image data processing, image enhancement, image generation, etc., can solve the problems of reducing image quality and spatial accuracy, global noise parameters cannot accurately reflect local voxel noise levels, etc.

Active Publication Date: 2016-07-20
KONINKLIJKE PHILIPS NV
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Unfortunately, the global noise parameter may not accurately reflect the local voxel noise level, which may degrade the resulting image quality for volume rendering and the resulting spatial accuracy for registration

Method used

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Embodiment Construction

[0018] figure 1 An imaging system 100 is shown, such as a computed tomography (CT) scanner. In another embodiment, the imaging system 100 includes, for example, positron emission computed tomography (PET), single photon emission computed tomography (SPECT), and / or other scanners. The illustrated imaging system 100 includes a fixed gantry 102 and a rotating gantry 104 rotatably supported by the fixed gantry 102 . The rotating gantry 104 rotates about a longitudinal or z-axis around an inspection zone 106 .

[0019] A radiation source 108 (eg, an x-ray tube) is supported by the rotating gantry 104 and rotates with the rotating gantry 104 around the examination region 106 and emits radiation throughout the examination region 106 . A one-dimensional or two-dimensional radiation-sensitive detector array 110 positioned opposite the radiation source 108 across the examination region 106 includes one or more rows of detector pixels arranged along the z-axis. The detector pixels det...

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Abstract

A method for processing image data includes obtaining a first set of 3D volumetric image data. The 3D volumetric image data includes a volume of voxels. Each voxel has an intensity. The method further includes obtaining a local voxel noise estimate for each of the voxels of the volume. The method further includes processing the volume of voxels based at least on the intensity of the voxels and the local voxel noise estimates of the voxels. An image data processor (124) includes a computer processor for at least one of: generating a 2D direct volume rendering from first 3D volumetric image data based on voxel intensity and individual local voxel noise estimates of the first 3D volumetric image data, or registering second 3D volumetric image data and first 3D volumetric image data based at least one individual local voxel noise estimates of second and first 3D volumetric image data sets.

Description

technical field [0001] The following generally relates to processing image data, and more specifically to processing image data using individual local voxel noise estimates, and is described in connection with the specific application of computed tomography (CT). However, the following also applies to other imaging modalities, such as positron emission computed tomography (PET), single photon emission computed tomography (SPECT), magnetic resonance (MR), ultrasound (US) and / or other imaging modalities. Background technique [0002] A CT scanner typically includes an x-ray tube mounted on a rotatable gantry positioned across the examination region opposite the detector array. The rotatable gantry (and thus the x-ray tube) rotates around the examination region, and the x-ray tube emits radiation throughout the examination region and parts of the object therein. A detector array detects the radiation and generates projection data indicative thereof. A reconstructor reconstruc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T15/08A61B1/00
CPCA61B6/032A61B6/466A61B6/5223A61B6/5235G06T15/08G06T7/30G06T7/0002G06T15/06G06T2207/10081G06T2210/41
Inventor R·维姆科T·克林德M·贝格特尔特C·洛伦茨
Owner KONINKLIJKE PHILIPS NV
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