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Ultrasound system with improved noise performance by persistence processing

An ultrasound imaging system, a continuous technology, applied in the field of ultrasound systems, which can solve problems such as reducing the average noise level

Pending Publication Date: 2020-09-11
KONINKLJIJKE PHILIPS NV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Unfortunately, due to the inherent nature of temporal averaging involved in persistence processing, this noise reduction only results in a reduction in the variation of noise artifacts; it does not reduce the average noise level (i.e., the "noise floor") itself

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  • Ultrasound system with improved noise performance by persistence processing
  • Ultrasound system with improved noise performance by persistence processing
  • Ultrasound system with improved noise performance by persistence processing

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Embodiment Construction

[0011] Reference is made below to one or more processors and memories associated with the processors, where the processors perform functions according to instructions. It should be understood that the processor associated with a specific function as described herein may be the same or a different processor from another processor associated with the specific function. For example, those skilled in the art will understand that one processor or multiple processors may include the processors described herein, such as, for example, an image processor, a noise bias coefficient processor, and a persistence processor.

[0012] figure 1 It illustrates how noise can be reduced by continuous image processing or other image combination techniques. Box 50 t , 50 t-1 And 50 t-2 Represents three image pixels or pixel groups at a common position in three consecutive ultrasound images. In this example, the pixels are all noise, and the amplitude is shown by the height of the circles 52, 54 and 5...

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Abstract

An ultrasound system produces persisted images in response to both persistence coefficients and noise bias coefficients. The persistence coefficients control the degree of persistence, which reduces noise variance by persistence processing. The noise bias coefficients are produced in correspondence with the likelihood that an image pixel is noise, and operate to reduce the noise floor of the persisted images. A single user control enables a user to control both the noise variance and the noise level of images in tandem or, alternatively, dedicated controls can become available to adjust noisevariance and noise level separately.

Description

Technical field [0001] The present invention relates to an ultrasound system, and in particular to an ultrasound imaging system that continuously processes images and reduces image noise. Background technique [0002] There are many noise sources that appear in ultrasound images as unwanted image artifacts. One source of noise is speckle noise due to the coherent nature of ultrasound imaging. The speckles are caused by the intermodulation of signals from different signal paths in the image field, resulting in what should appear as a speckled appearance of uniform smooth tissue. Two methods widely used to reduce image speckles are frequency compounding as described in US Patent Re.35148 (Lizzi et al.) and spatial compounding as described in US Patent US6126598 (Entrekin et al.). Another source of image noise is radio frequency radiation from nearby electrical equipment. This noise is reduced by shielding the ultrasound system and transducer from radio frequency interference and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S15/89G01S7/52
CPCG01S15/8977G01S7/52046G01S7/52077A61B8/06A61B8/14A61B8/488A61B8/5246A61B8/5276G01S15/8906
Inventor T·卢帕斯P·希兰C·特伦布莱-达尔沃
Owner KONINKLJIJKE PHILIPS NV
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