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spectral imaging

An imaging system, a technology of spectral characteristics, applied in the use of spectral diagnosis, instrumentation, X/γ/cosmic radiation measurement, etc., can solve problems such as degraded image quality and noise in volume image data

Active Publication Date: 2016-12-07
KONINKLJIJKE PHILIPS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for larger objects, few 80kVp photons pass through the object, and the volumetric image data may be noisy and have reduced image quality

Method used

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Embodiment Construction

[0017] figure 1 An imaging system 100, such as a computed tomography (CT) scanner 100, is schematically illustrated. Imaging system 100 includes a stationary gantry 102 and a rotating gantry 104 . The rotating frame 104 is rotatably supported by the stationary frame 102 . The rotating gantry 104 is configured to rotate about the examination region 108 about the longitudinal or z-axis.

[0018] At least one radiation source 106, such as an X-ray tube, is supported by the rotating gantry 104 and rotates therewith. For example, for a 2D projection scan, if not already at a predetermined static angular position, the rotating gantry 104 is rotated to move the radiation source 106 to that position. For volume scans, the rotating gantry 104 is also rotated to rotate the radiation source 106 around the examination area 108 .

[0019] The radiation source voltage determiner 112 is configured to switch the peak emission voltage between two or more voltages (eg, 80 kVp, 100 kVp, 140 ...

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Abstract

An imaging system includes a radiation source (106) emitting radiation throughout an examination region and a portion of an object therein; and a detector array (114) that detects the radiation through the examination region and a portion of the object therein. A portion of the radiation is generated and a signal indicative of the radiation is generated. A volume scan parameter recommender (120) recommends at least one of the volume scans for the portion of the object based on the spectral decomposition of the first and second 2D projections acquired by the radiation source and the detector array Spectrum scan parameter values. The first 2D projection and the second 2D projection have different spectral properties. The console (122) employs the recommended at least one spectral scan parameter value to perform the volumetric scan of the portion of the object.

Description

technical field [0001] The following relates generally to spectral imaging and, more particularly, to determining determinations for spectral imaging based on two or more two-dimensional (2D) projection scans (scanned images) performed at two or more kVp from approximately the same acquisition viewing angle. Appropriate tube voltages for volume scans and are described below in connection with specific applications to computed tomography (CT). Background technique [0002] Conventional CT scanners typically include an X-ray tube mounted on a rotatable gantry, opposite the detector array across the examination area. The rotatable gantry, and thus the X-ray tube, rotates around the examination area. The X-ray tube emits radiation that penetrates the examination area and parts of the objects therein and is detected by the detector array. The detector array generates and outputs signals indicative of the scanned portion of the object. The signal is reconstructed to generate th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01T1/29
CPCG01T1/2985G01T1/2008A61B5/0075A61B6/42A61B6/5205
Inventor D·舍费尔A·特伦T·克勒
Owner KONINKLJIJKE PHILIPS NV