Ensembled artificial neural networks to predict the fitness score for body composition analysis

2010 ◽  
Vol 15 (5) ◽  
pp. 341-348 ◽  
Author(s):  
X. R. Cui ◽  
M. F. Abbod ◽  
Q. Liu ◽  
Jiann-Shing Shieh ◽  
T. Y. Chao ◽  
...  
Author(s):  
Sven Koitka ◽  
Lennard Kroll ◽  
Eugen Malamutmann ◽  
Arzu Oezcelik ◽  
Felix Nensa

The original version of this article, published on 18 September 2020, unfortunately contained a mistake.


Author(s):  
Vlastimil Dohnal ◽  
Lenka Podloucká ◽  
Zuzana Grosmanová ◽  
Jiří Krejčí

Biosensors are analytical devices that transforms chemical information, ranging from the concentration of a specific sample component to total composition analysis, into an analytical signal and that utilizes a biochemical mechanism for the chemical recognition. The complexity of biosensor construction and generation of measured signal requires the development of new method for signal eva­luation and its possible defects recognition. A new method based on artificial neural networks (ANN) was developed for recognition of characteristic behavior of signals joined with malfunction of sensor. New algorithm uses unsupervised Kohonen self-organizing neural networks. The work with ANN has two phases – adaptation and prediction. During the adaptation step the classification model is build. Measured data form groups after projection into two-dimensional space based on theirs similarity. After identification of these groups and establishing the connection with signal disorders ANN can be used for evaluation of newly measured signals. This algorithm was successfully applied for 540 signal classification obtained from immobilized acetylcholinesterase biosensor measurement of organophosphate and carbamate pesticides in vegetables, fruits, spices, potatoes and soil samples. From six different signal defects were successfully classified four – low response after substrate addition, equilibration at high values, slow equilibration after substrate addition respectively low sensitivity on syntostigmine.


2019 ◽  
Vol 38 ◽  
pp. S17
Author(s):  
M.T. Paris ◽  
D.K. Heyland ◽  
P. Tandon ◽  
H.F. Furberg ◽  
T. Premji ◽  
...  

2020 ◽  
Vol 39 (10) ◽  
pp. 3049-3055 ◽  
Author(s):  
Michael T. Paris ◽  
Puneeta Tandon ◽  
Daren K. Heyland ◽  
Helena Furberg ◽  
Tahira Premji ◽  
...  

2003 ◽  
Vol 40 (S1) ◽  
pp. s9-s14 ◽  
Author(s):  
R. Linder ◽  
E. I. Mohamed ◽  
A. De Lorenzo ◽  
S. J. Pöppl

Author(s):  
Sven Koitka ◽  
Lennard Kroll ◽  
Eugen Malamutmann ◽  
Arzu Oezcelik ◽  
Felix Nensa

Abstract Objectives Body tissue composition is a long-known biomarker with high diagnostic and prognostic value not only in cardiovascular, oncological, and orthopedic diseases but also in rehabilitation medicine or drug dosage. In this study, the aim was to develop a fully automated, reproducible, and quantitative 3D volumetry of body tissue composition from standard CT examinations of the abdomen in order to be able to offer such valuable biomarkers as part of routine clinical imaging. Methods Therefore, an in-house dataset of 40 CTs for training and 10 CTs for testing were fully annotated on every fifth axial slice with five different semantic body regions: abdominal cavity, bones, muscle, subcutaneous tissue, and thoracic cavity. Multi-resolution U-Net 3D neural networks were employed for segmenting these body regions, followed by subclassifying adipose tissue and muscle using known Hounsfield unit limits. Results The Sørensen Dice scores averaged over all semantic regions was 0.9553 and the intra-class correlation coefficients for subclassified tissues were above 0.99. Conclusions Our results show that fully automated body composition analysis on routine CT imaging can provide stable biomarkers across the whole abdomen and not just on L3 slices, which is historically the reference location for analyzing body composition in the clinical routine. Key Points • Our study enables fully automated body composition analysis on routine abdomen CT scans. • The best segmentation models for semantic body region segmentation achieved an averaged Sørensen Dice score of 0.9553. • Subclassified tissue volumes achieved intra-class correlation coefficients over 0.99.


1999 ◽  
Vol 22 (8) ◽  
pp. 723-728 ◽  
Author(s):  
Artymiak ◽  
Bukowski ◽  
Feliks ◽  
Narberhaus ◽  
Zenner

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