scholarly journals A Technique to Reduce Motion Artifact for Externally Triggered Cine-MRI(EC-MRI) Based on Detecting the Onset of the Articulated Word with Spectral Analysis

2012 ◽  
Vol 11 (4) ◽  
pp. 273-282 ◽  
Author(s):  
Yasuhiro SHIMADA ◽  
Hironori NISHIMOTO ◽  
Takanori KOCHIYAMA ◽  
Ichiro FUJIMOTO ◽  
Hiroaki MANO ◽  
...  
Keyword(s):  
Spectral Analysis ◽  
Motion Artifact ◽  
Cine Mri ◽  
Reduce Motion Artifact

Using motion sensors to reduce motion artifact in the ECG

2004 ◽  
Vol 37 ◽  
pp. 43 ◽  
Author(s):  
David A. Tong ◽  
Keith A. Bartels ◽  
Kevin S. Honeyager
Keyword(s):  
Motion Artifact ◽  
Motion Sensors ◽  
Reduce Motion Artifact

scholarly journals A Novel CT Imaging System with Adjacent Double X-Ray Sources

2013 ◽  
Vol 2013 ◽  
pp. 1-6
Author(s):  
Mou An ◽  
Yaoqin Xie
Keyword(s):  
Imaging System ◽  
Motion Artifact ◽  
Ct Imaging ◽  
Short Exposure ◽  
Single Source ◽  
Short Exposure Time ◽  
X Ray ◽  
Dual Source ◽  
Ct System ◽  
Reduce Motion Artifact

Current computed tomography (CT) scanners rotate fast to reduce motion artifact. X-ray tube must work in a high power to make the image clear under short exposure time. However, the life span of such a tube may be shortened. In this paper, we propose a novel double sources CT imaging system, which puts two of the same X-ray sources closely with each other. The system is different from current dual source CT with orthogonal X-ray sources. In our system, each projection is taken twice by these two sources to enhance the exposure value and then recovered to a single source projection for image reconstruction. The proposed system can work like normal single source CT system, while halving down the working power for each tube.

scholarly journals Common computed tomography artifact: source and avoidance

2021 ◽  
Vol 52 (1) ◽  
Author(s):  
Amel F. Alzain ◽  
Nagwan Elhussein ◽  
Ibtisam Abdallah Fadulelmulla ◽  
Amna Mohamed Ahmed ◽  
M. E. Elbashir ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Image Quality ◽  
Motion Artifact ◽  
Ct Images ◽  
Improve Image Quality ◽  
Helical Reconstruction ◽  
Patient Preparation ◽  
The Common ◽  
Reduce Motion Artifact

Abstract Background Artifacts have significantly degraded the quality of computed tomography (CT) images, to the extent of making them unusable for diagnosis. The types of artifact that could be used are as follows: (a) streaking, which is commonly due to a discrepancy in a single measurement, (b) shading, which is due to a group of channels deviating gradually from the true measurement, (c) rings, which are due to errors in individual detector calibration and (d) distortion, which is due to helical reconstruction. It is occasionally possible to avoid scanning of a bony area, by means of changing the postion of the patient. Thus, this study aimed to evaluate the common artifacts that affect image quality and the method of correction to improve image quality. Results The data were collected by distributing a questionnaire to the CT technologist at different hospitals about the most common type of artifacts in the CT images, source of artifacts and methods of correction. A total of 95 CT technologists responded to the questionnaire, which included 67% males and 33% females. Most of the participants (70%) were experienced CT technologists, and 61% of the participants had not done any subspecialty CT scan courses. The most common artifact used in the CT departments was motion artifact in brain CT (73%), and the best method to reduce motion artifact was patient preparation (87%). Conclusions The most common shown artifact in this study was motion artifact, and the common cause was the patient-based artifact. It is important to understand why objects occur and how they could be prevented or suppressed to improve image quality.

The Utilization of Immobilization Device to Reduce Motion Artifact Caused by Breathing in Upper Extremity MRI

2020 ◽  
Vol 30 (1) ◽  
pp. 11-17
Author(s):  
Soon-yong Kwon ◽  
◽  
Sangwoo Kim ◽  
Seong-Ho Kim ◽  
Chung-Hwan Kang ◽  
...  
Keyword(s):  
Upper Extremity ◽  
Motion Artifact ◽  
Immobilization Device ◽  
Reduce Motion Artifact

Spectral analysis of asymmetry training effect for depression

2008 ◽  
Author(s):  
Ji Ha Lee ◽  
Sung Won Choi ◽  
Ji Sun Min ◽  
Eun Ju Jaekal ◽  
Gyhye Sung
Keyword(s):  
Spectral Analysis ◽  
Training Effect
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