scholarly journals An Automated Segmentation Method of Kidney Using Statistical Information

2002 ◽  
pp. 556-563 ◽  
Author(s):  
Baigalmaa Tsagaan ◽  
Akinobu Shimizu ◽  
Hidefumi Kobatake ◽  
Kunihisa Miyakawa
Keyword(s):  
Statistical Information ◽  
Automated Segmentation ◽  
Segmentation Method

scholarly journals Prefrontal and hippocampal atrophy using 7-tesla magnetic resonance imaging in patients with Parkinson’s disease

2021 ◽  
Vol 10 (2) ◽  
pp. 205846012098809
Author(s):  
Byeong H Oh ◽  
Hyeong C Moon ◽  
Aryun Kim ◽  
Hyeon J Kim ◽  
Chae J Cheong ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Parkinson’S Disease ◽  
Parkinson's Disease ◽  
Magnetic Resonance ◽  
7 Tesla ◽  
Cortical Atrophy ◽  
Automated Segmentation ◽  
Healthy Controls ◽  
Segmentation Method ◽  
Resonance Imaging

Background The pathology of Parkinson’s disease leads to morphological changes in brain structure. Currently, the progressive changes in gray matter volume that occur with time and are specific to patients with Parkinson’s disease, compared to healthy controls, remain unclear. High-tesla magnetic resonance imaging might be useful in differentiating neurological disorders by brain cortical changes. Purpose We aimed to investigate patterns in gray matter changes in patients with Parkinson’s disease by using an automated segmentation method with 7-tesla magnetic resonance imaging. Material and Methods High-resolution T1-weighted 7 tesla magnetic resonance imaging volumes of 24 hemispheres were acquired from 12 Parkinson’s disease patients and 12 age- and sex-matched healthy controls with median ages of 64.5 (range, 41–82) years and 60.5 (range, 25–74) years, respectively. Subgroup analysis was performed according to whether axial motor symptoms were present in the Parkinson’s disease patients. Cortical volume, cortical thickness, and subcortical volume were measured using a high-resolution image processing technique based on the Desikan-Killiany-Tourville atlas and an automated segmentation method (FreeSurfer version 6.0). Results After cortical reconstruction, in 7 tesla magnetic resonance imaging volume segmental analysis, compared with the healthy controls, the Parkinson’s disease patients showed global cortical atrophy, mostly in the prefrontal area (rostral middle frontal, superior frontal, inferior parietal lobule, medial orbitofrontal, rostral anterior cingulate area), and subcortical volume atrophy in limbic/paralimbic areas (fusiform, hippocampus, amygdala). Conclusion We first demonstrated that 7 tesla magnetic resonance imaging detects structural abnormalities in Parkinson’s disease patients compared to healthy controls using an automated segmentation method. Compared with the healthy controls, the Parkinson’s disease patients showed global prefrontal cortical atrophy and hippocampal area atrophy.

An abdominal aortic aneurysm segmentation method: Level set with region and statistical information

2006 ◽  
Vol 33 (5) ◽  
pp. 1440-1453 ◽  
Author(s):  
Feng Zhuge ◽  
Geoffrey D. Rubin ◽  
Shaohua Sun ◽  
Sandy Napel
Keyword(s):  
Abdominal Aortic Aneurysm ◽  
Aortic Aneurysm ◽  
Level Set ◽  
Statistical Information ◽  
Segmentation Method ◽  
Abdominal Aortic

Segmentation of design protocol using EEG

2018 ◽  
Vol 33 (1) ◽  
pp. 11-23 ◽  
Author(s):  
Philon Nguyen ◽  
Thanh An Nguyen ◽  
Yong Zeng
Keyword(s):  
Automated Segmentation ◽  
Manual Segmentation ◽  
Engineering Systems ◽  
Verbal Protocols ◽  
Segmentation Method ◽  
Average Deviation ◽  
Domain Experts ◽  
Design Activities ◽  
The Mind ◽  
Design Protocol

AbstractDesign protocol data analysis methods form a well-known set of techniques used by design researchers to further understand the conceptual design process. Verbal protocols are a popular technique used to analyze design activities. However, verbal protocols are known to have some limitations. A recurring problem in design protocol analysis is to segment and code protocol data into logical and semantic units. This is usually a manual step and little work has been done on fully automated segmentation techniques. Physiological signals such as electroencephalograms (EEG) can provide assistance in solving this problem. Such problems are typical inverse problems that occur in the line of research. A thought process needs to be reconstructed from its output, an EEG signal. We propose an EEG-based method for design protocol coding and segmentation. We provide experimental validation of our methods and compare manual segmentation by domain experts to algorithmic segmentation using EEG. The best performing automated segmentation method (when manual segmentation is the baseline) is found to have an average deviation from manual segmentations of 2 s. Furthermore, EEG-based segmentation can identify cognitive structures that simple observation of design protocols cannot. EEG-based segmentation does not replace complex domain expert segmentation but rather complements it. Techniques such as verbal protocols are known to fail in some circumstances. EEG-based segmentation has the added feature that it is fully automated and can be readily integrated in engineering systems and subsystems. It is effectively a window into the mind.

Quantification of fat in the posterior sacroiliac joint region applying a semi-automated segmentation method

2020 ◽  
Vol 191 ◽  
pp. 105386 ◽  
Author(s):  
Amélie Poilliot ◽  
Murray Tannock ◽  
Ming Zhang ◽  
Johann Zwirner ◽  
Niels Hammer
Keyword(s):  
Sacroiliac Joint ◽  
Automated Segmentation ◽  
Segmentation Method ◽  
Joint Region

Computer-based automated analysis of X-ray and thermal imaging of knee region in evaluation of rheumatoid arthritis

2017 ◽  
Vol 231 (12) ◽  
pp. 1178-1187 ◽  
Author(s):  
U Snekhalatha ◽  
T Rajalakshmi ◽  
M Gopikrishnan ◽  
Nilkantha Gupta
Keyword(s):  
Rheumatoid Arthritis ◽  
Thermal Imaging ◽  
Automated Segmentation ◽  
Statistical Features ◽  
Segmentation Method ◽  
X Ray ◽  
Knee Region ◽  
Erythrocyte Sedimentation ◽  
Occurrence Matrix ◽  
Snake Algorithm

The aim and objectives of the study are as follows: (1) to perform automated segmentation of knee X-ray images using fast greedy snake algorithm and feature extraction using gray level co-occurrence matrix method, (2) to implement automated segmentation of knee thermal image using RGB segmentation method and (3) to compare the features extracted from the segmented knee region of X-ray and thermal images in rheumatoid arthritis patients using a biochemical method as standard. In all, 30 rheumatoid arthritis patients and 30 age- and sex-matched healthy volunteers were included in the study. X-ray and thermography images of knee regions were acquired, and biochemical tests were carried out subsequently. The X-ray images were segmented using fast greedy snake algorithm, and feature extractions were performed using gray level co-occurrence matrix method. The thermal image was segmented using RGB-based segmentation method and statistical features were extracted. Statistical features extracted after segmentation from X-ray and thermal imaging of knee region were correlated with the standard biochemical parameters. The erythrocyte sedimentation rate shows statistically significant correlations (p < 0.01) with the X-ray parameters such as joint space width and % combined cortical thickness. The skin surface temperature measured from knee region of thermal imaging was highly correlated with erythrocyte sedimentation rate. Among all the extracted features namely mean, variance, energy, homogeneity and difference entropy depict statistically significant percentage differences between the rheumatoid arthritis and healthy subjects. From this study, it was observed that thermal infrared imaging technique serves as a potential tool in the evaluation of rheumatoid arthritis at an earlier stage compared to radiography. Hence, it was predicted that thermal imaging method has a competency in the diagnosis of rheumatoid arthritis by automated segmentation methods.

scholarly journals IC-P-081: Quantification of White Matter Hyperintensities Using A Multi-Modality Automated Segmentation Method

2016 ◽  
Vol 12 ◽  
pp. P63-P63
Author(s):  
Richard Joules ◽  
Katherine R. Gray ◽  
Natalie Royle ◽  
Robin Wolz ◽  
Derek L. Hill
Keyword(s):  
White Matter ◽  
White Matter Hyperintensities ◽  
Automated Segmentation ◽  
Segmentation Method
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