A New Rapid and Effective Chemistry Space Filter in Recognizing a Druglike Database

2005 ◽  
Vol 45 (4) ◽  
pp. 856-862 ◽  
Author(s):  
Suxin Zheng ◽  
Xiaomin Luo ◽  
Gang Chen ◽  
Weiliang Zhu ◽  
Jianhua Shen ◽  
...  
Keyword(s):  
Chemistry Space ◽  
Space Filter

K-space filter effect in three-dimensional contrast MR angiography

1997 ◽  
Vol 38 (1) ◽  
pp. 173-175 ◽  
Author(s):  
K. Ito ◽  
J. Kato ◽  
S. Okada ◽  
T. Kumazaki
Keyword(s):  
Contrast Agent ◽  
Data Acquisition ◽  
Mr Angiography ◽  
Three Dimensional ◽  
Mr Images ◽  
Acquisition Period ◽  
Filter Effect ◽  
Flowing Material ◽  
Space Filter

Purpose: In three-dimensional (3-D) contrast MR angiography, temporal misregistration between the data acquisition period and the arrival of the contrast agent in the target vessels is thought to degrade the quality of the reconstructed images. The purpose of this study was to demonstrate and investigate this effect in phantom experiments. Material and Methods: MR images of a phantom tube were evaluated with flowing materials of water or Gd-DTPA solution by changing from water to Gd-DTPA solution halfway through the data acquisition period. Results: While no signal could be acquired with a stream of water in the tube, a clear signal was obtained with a flow of Gd-DTPA solution. Blurring and ghost artifacts surrounding the tube along the phase-encoding direction were observed when the flowing material was changed from water to Gd-DTPA solution halfway through the data acquisition period. Conclusion: K-space filter effect occurs during 3-D contrast MR angiography owing to the transient passage of the contrast agent, and this effect causes spatial artifacts in the reconstructed images.

scholarly journals A new smooth-k space filter approach to calculate halo abundances

2018 ◽  
Vol 2018 (04) ◽  
pp. 010-010 ◽  
Author(s):  
Matteo Leo ◽  
Carlton M. Baugh ◽  
Baojiu Li ◽  
Silvia Pascoli
Keyword(s):  
Filter Approach ◽  
Space Filter

scholarly journals Space-filter techniques for quasi-neutral hybrid-kinetic models

2020 ◽  
Vol 27 (8) ◽  
pp. 082102
Author(s):  
S. S. Cerri ◽  
E. Camporeale
Keyword(s):  
Kinetic Models ◽  
Space Filter

scholarly journals Adventures in Drug-like Chemistry Space: From Oxetanes to Spiroazetidines and Beyond!

2014 ◽  
Vol 68 (7) ◽  
pp. 492-499 ◽  
Author(s):  
Mark Rogers-Evans ◽  
Henner Knust ◽  
Jean-Marc Plancher ◽  
Erick M. Carreira ◽  
George Wuitschik ◽  
...  
Keyword(s):  
Chemistry Space

Improving accuracy in the MPM method using a null space filter

2016 ◽  
Vol 4 (1) ◽  
pp. 131-142 ◽  
Author(s):  
Chris Gritton ◽  
Martin Berzins
Keyword(s):  
Null Space ◽  
Improving Accuracy ◽  
Space Filter

scholarly journals Image Scale-Space Filtering Using Directional Local Variance Controlled Anisotropic Diffusion

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Yong Chen ◽  
Taoshun He
Keyword(s):  
Anisotropic Diffusion ◽  
Scale Space ◽  
Image Features ◽  
Spatial Gradient ◽  
Trigger Time ◽  
Local Variance ◽  
Series Of Experiments ◽  
Edge Indicator ◽  
Anisotropic Diffusion Equation ◽  
Space Filter

The purpose of this paper is to develop an effective edge indicator and propose an image scale-space filter based on anisotropic diffusion equation for image denoising. We first develop an effective edge indicator named directional local variance (DLV) for detecting image features, which is anisotropic and robust and able to indicate the orientations of image features. We then combine two edge indicators (i.e., DLV and local spatial gradient) to formulate the desired image scale-space filter and incorporate the modulus of noise magnitude into the filter to trigger time-varying selective filtering. Moreover, we theoretically show that the proposed filter is robust to the outliers inherently. A series of experiments are conducted to demonstrate that the DLV metric is effective for detecting image features and the proposed filter yields promising results with higher quantitative indexes and better visual performance, which surpass those of some benchmark models.

scholarly journals 185. The evaluation of K-space filter for fast spin echo method

1994 ◽  
Vol 50 (8) ◽  
pp. 1103
Author(s):  
SATORU KOHNO ◽  
AKIHIRO ISHIKAWA ◽  
NAOTO IIJIMA
Keyword(s):  
Spin Echo ◽  
Fast Spin Echo ◽  
Fast Spin ◽  
Space Filter
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