to the geometry of the X-ray 20 that is transmitted the method comprising the steps of generating a three-dimensional image 40 which is deconvolved by applying a 2-dimensional deconvolution to slice 52 of the three-dimensional raw image volume 36, the slice 32 is adapted to coordinate grid ...
The invention discloses a suppression method and device for a grid artifact in an X-ray image. The method comprises the following steps: carrying out one-dimensional high-pass filtering to an original X-ray image in a direction vertical to a grid line of a grid of an original X-ray image...
In this paper,a novel preprocessing technique is proposed for the correction of ring artifact in X-ray CT image.By fitting each projection in sinogram image with piecewise polynomial,a set of candidate correction factors for mis-calibrated detector is created and then the factor with maximum probab...
Metal artifact reduction based on beam hardening correction and statistical iterative reconstruction for X-ray computed tomography Metal artifact is a main cause to degrade CT image quality, but there is still no standard solution to this issue. The cause of introduction of metal artif... Y Zhang...
Metal Artifact Reduction Based on Beam Hardening Correction and Statistical Iterative Reconstruction for X-ray Computed Tomography Metal artifact is a main cause to degrade CT image quality, but there is still no standard solution to this issue. The cause of introduction of metal artif... Y Zhang...
2.distortion or fuzziness of an image caused by manipulation, such as during compression of a digital file. film artifactartificial images on x-ray films due to storage, handling, or processing. phantom artifactartificial images seen with conventionaltomography. ...
Objectives The performance of metal artifact reduction (MAR) methods in x-ray computed tomography (CT) suffers from incorrect identification of metallic im... CKWA Ruth - 《Investigative Radiology》 被引量: 0发表: 2017年 加载更多来源期刊 Medical Physics 2011/02/01 研究点推荐 image reconstruction...
Thoracic low-dose CT image processing using an artifact suppressed large-scale nonlocal means 来自 掌桥科研 喜欢 0 阅读量: 264 作者:Y Chen,Z Yang,Y Hu,G Yang,Y Zhu,Y Li,L Luo,W Chen,C Toumoulin 摘要: The x-ray exposure to patients has become a major concern in computed tomography ...
The device has an artifact determining unit (27-1) determining each pixel, which is contained in a tomography image, as an artifact. An artifact determining unit (27-2) presets a decision pixel range, which contains a target pixel. The unit (27-2) again determines the target pixel as the...
A simple, direct method for x-ray scatter estimation and correction in digital radiography and cone-beam CT X-ray scatter poses a significant limitation to image quality in cone-beam CT (CBCT), resulting in contrast reduction, image artifacts, and lack of CT numb... JH Siewerdsen,MJ Daly...