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公开(公告)号：US10064591B2
公开(公告)日：2018-09-04
申请号：US15322697
申请日：2015-07-09
发明人： Adam Wang , Jeffrey H. Siewerdsen
摘要： A novel method for simulating radiation dose reduction that enables previews of low-dose x-ray projection images, low-dose computed tomography images and/or cone-beam CT images. Given an existing projection or set of projections of the patient acquired at a nominal dose, the method provides a means to produce highly accurate preview images that accurately reflect the image quality associated with reduced radiation dose. The low-dose preview image accounts for characteristics of the imaging system, including blur, variations in detector gain and electronic noise, and does so in a manner that yields accurate depiction of the magnitude and correlation of image noise in the preview images. A calibration step may be included to establish the system-specific relationship between the mean and variance in detector signal, and incorporate an accurate model for system blur such that correlations in the resulting LDP images are accurate.
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公开(公告)号：US10022098B2
公开(公告)日：2018-07-17
申请号：US14795206
申请日：2015-07-09
摘要： A method of generating a preview of at least one low-dose x-ray image includes the followings steps: obtaining an initial volumetric representation of a patient from an x-ray device; creating at least one x-ray image projection from the initial volumetric representation; injecting correlated noise into at least one of the x-ray image projections; and processing the noise-injected x-ray image projections to create at least one preview of a patient-specific low-dose x-ray for showing to a user. There are also described a device for generating at least one preview of a low-dose x-ray image, a corresponding imaging system, and a non-transitory computer readable medium.
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3.发明申请公开(公告)号：US20170135659A1
公开(公告)日：2017-05-18
申请号：US15322697
申请日：2015-07-09
发明人： Adam Wang , Jeffrey H. Siewerdsen
CPC分类号： A61B6/488 , A61B6/02 , A61B6/03 , A61B6/032 , A61B6/4233 , A61B6/461 , A61B6/52 , A61B6/5258 , A61B6/542 , A61B6/582 , G06T11/003 , G06T11/005 , G06T11/006 , G06T2207/10081
摘要： A novel method for simulating radiation dose reduction that enables previews of low-dose x-ray projection images, low-dose computed tomography images and/or cone-beam CT images. Given an existing projection or set of projections of the patient acquired at a nominal dose, the method provides a means to produce highly accurate preview images that accurately reflect the image quality associated with reduced radiation dose. The low-dose preview image accounts for characteristics of the imaging system, including blur, variations in detector gain and electronic noise, and does so in a manner that yields accurate depiction of the magnitude and correlation of image noise in the preview images. A calibration step may be included to establish the system-specific relationship between the mean and variance in detector signal, and incorporate an accurate model for system blur such that correlations in the resulting LDP images are accurate.
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