scholarly journals Quantitative gait analysis of idiopathic normal pressure hydrocephalus using deep learning algorithms on monocular videos

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Sungmoon Jeong ◽  
Hosang Yu ◽  
Jaechan Park ◽  
Kyunghun Kang
Keyword(s):  
Deep Learning ◽  
Gait Analysis ◽  
Normal Pressure Hydrocephalus ◽  
Learning Algorithms ◽  
Normal Pressure ◽  
Gait Variability ◽  
Stride Time ◽  
Analysis Method ◽  
Gait Parameters ◽  
Analysis System

AbstractA vision-based gait analysis method using monocular videos was proposed to estimate temporo-spatial gait parameters by leveraging deep learning algorithms. This study aimed to validate vision-based gait analysis using GAITRite as the reference system and analyze relationships between Frontal Assessment Battery (FAB) scores and gait variability measured by vision-based gait analysis in idiopathic normal pressure hydrocephalus (INPH) patients. Gait data from 46 patients were simultaneously collected from the vision-based system utilizing deep learning algorithms and the GAITRite system. There was a strong correlation in 11 gait parameters between our vision-based gait analysis method and the GAITRite gait analysis system. Our results also demonstrated excellent agreement between the two measurement systems for all parameters except stride time variability after the cerebrospinal fluid tap test. Our data showed that stride time and stride length variability measured by the vision-based gait analysis system were correlated with FAB scores. Vision-based gait analysis utilizing deep learning algorithms can provide comparable data to GAITRite when assessing gait dysfunction in INPH. Frontal lobe functions may be associated with gait variability measurements using vision-based gait analysis for INPH patients.

scholarly journals Quantitative Gait Analysis and Cerebrospinal Fluid Tap Test for Idiopathic Normal-pressure Hydrocephalus

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Yong-Hyun Lim ◽  
Pan-Woo Ko ◽  
Ki-Su Park ◽  
Sung Kyoo Hwang ◽  
Sung-Hee Kim ◽  
...  
Keyword(s):  
Cerebrospinal Fluid ◽  
Gait Analysis ◽  
Normal Pressure Hydrocephalus ◽  
Stride Length ◽  
Normal Pressure ◽  
Healthy Controls ◽  
Stride Time ◽  
Step Width ◽  
Tap Test ◽  
Quantitative Gait Analysis

Abstract We investigated gait performance utilizing a quantitative gait analysis for 2 groups: (1) idiopathic normal-pressure hydrocephalus (INPH) patients who had a positive response to the cerebrospinal fluid tap test (CSFTT) and (2) healthy controls. The aims of the study were (1) to analyze the characteristics of gait features, (2) to characterize changes in gait parameters before and after the CSFTT, and (3) to determine whether there was any relationship between stride time and stride length variability and Frontal Assessment Battery (FAB) scores in INPH patients. Twenty-three INPH patients and 17 healthy controls were included in this study. Compared with healthy controls, the gait of INPH patients was characterized by lower velocity, shorter stride length, and more broad-based gait. Patients with INPH had a longer stance phase with increased double-limb support. Variability in stride time and stride length was increased in INPH patients. Stride time and stride length variability were correlated with FAB score. After the CSFTT, gait velocity, stride length, and step width significantly improved. There were significant decreases in stride time and stride length variability. These results suggest that the CSFTT for INPH patients might improve the so-called balance-related gait parameter (ie, step width) as well. Stride time and stride length variability also responded to the CSFTT. Association between FAB scores and both stride time and stride length variability suggests involvement of similar circuits producing gait variability and frontal lobe functions in INPH patients.

scholarly journals Gait Analysis of Idiopathic Normal Pressure Hydrocephalus

2002 ◽  
Vol 24 (1) ◽  
pp. 37-44 ◽  
Author(s):  
Yuichi AOYAMA ◽  
Yoshimasa KINOSHITA ◽  
Akira YOKOTA ◽  
Hideyuki TOGAMI
Keyword(s):  
Gait Analysis ◽  
Normal Pressure Hydrocephalus ◽  
Normal Pressure ◽  
Idiopathic Normal Pressure Hydrocephalus

Relationship between gait parameters and MR imaging in idiopathic normal pressure hydrocephalus patients after shunt surgery

2018 ◽  
Vol 61 ◽  
pp. 163-168
Author(s):  
Ippei Kitade ◽  
Ryuhei Kitai ◽  
Hiroyuki Neishi ◽  
Ken-ichiro Kikuta ◽  
Seiichiro Shimada ◽  
...  
Keyword(s):  
Mr Imaging ◽  
Normal Pressure Hydrocephalus ◽  
Normal Pressure ◽  
Idiopathic Normal Pressure Hydrocephalus ◽  
Shunt Surgery ◽  
Gait Parameters

scholarly journals Assessing the concurrent validity of a gait analysis system integrated into a smart walker in older adults with gait impairments

2019 ◽  
Vol 33 (10) ◽  
pp. 1682-1687 ◽  
Author(s):  
Christian Werner ◽  
Georgia Chalvatzaki ◽  
Xanthi S Papageorgiou ◽  
Costas S Tzafestas ◽  
Jürgen M Bauer ◽  
...  
Keyword(s):  
Gait Analysis ◽  
Gait Speed ◽  
Concurrent Validity ◽  
Stride Length ◽  
Gait Parameters ◽  
Stance Time ◽  
Absolute Agreement ◽  
Analysis System ◽  
Smart Walker ◽  
Gait Impairments

Objective: To assess the concurrent validity of a smart walker–integrated gait analysis system with the GAITRite® system for measuring spatiotemporal gait parameters in potential users of the smart walker. Design: Criterion standard validation study. Setting: Research laboratory in a geriatric hospital. Participants: Twenty-five older adults (⩾65 years) with gait impairments (habitual rollator use and/or gait speed <0.6 m/s) and no severe cognitive impairment (Mini-Mental State Examination ⩾17). Main measures: Stride, swing and stance time; stride length; and gait speed were simultaneously recorded using the smart walker–integrated gait analysis system and the GAITRite system while participants walked along a 7.8-m walkway with the smart walker. Concurrent criterion-related validity was assessed using the Bland–Altman method, percentage errors (acceptable if <30%), and intraclass correlation coefficients for consistency (ICC3,1) and absolute agreement (ICC2,1). Results: Bias for stride, swing and stance time ranged from −0.04 to 0.04 seconds, with acceptable percentage errors (8.7%–23.0%). Stride length and gait speed showed higher bias (meanbias (SD) = 0.20 (0.11) m; 0.19 (0.13) m/s) and not acceptable percentage errors (31.3%–42.3%). Limits of agreement were considerably narrower for temporal than for spatial-related gait parameters. All gait parameters showed good-to-excellent consistency (ICC3,1 = 0.72–0.97). Absolute agreement was good-to-excellent for temporal (ICC2,1 = 0.72–0.97) but only poor-to-fair for spatial-related gait parameters (ICC2,1 = 0.37–0.52). Conclusion: The smart walker–integrated gait analysis system has good concurrent validity with the GAITRite system for measuring temporal but not spatial-related gait parameters in potential end-users of the smart walker. Stride length and gait speed can be measured with good consistency, but with only limited absolute accuracy.

scholarly journals Can an Observational Gait Scale Produce a Result Consistent with Symmetry Indexes Obtained from 3-Dimensional Gait Analysis?: A Concurrent Validity Study

2020 ◽  
Vol 9 (4) ◽  
pp. 926
Author(s):  
Agnieszka Guzik ◽  
Mariusz Drużbicki ◽  
Lidia Perenc ◽  
Justyna Podgórska-Bednarz
Keyword(s):  
Gait Analysis ◽  
Movement Analysis ◽  
Ordinal Scale ◽  
Coefficient Of Determination ◽  
3D Analysis ◽  
3 Dimensional ◽  
Observational Tool ◽  
Gait Parameters ◽  
Flexion Extension ◽  
Analysis System

To investigate whether a simple observational tool may be a substitute to the time-consuming and costly 3-dimensional (3D) analysis, the study applied the Wisconsin Gait Scale (WGS), enabling assessment which is highly consistent with 3D gait parameters in patients after a stroke. The aim of this study was to determine whether, and to what extent, observational information obtained from WGS-based assessment can be applied to predict results of 3D gait analysis for selected symmetry indicators related to spatiotemporal and kinematic gait parameters. Fifty patients at a chronic stage of recovery post-stroke were enrolled in the study. The spatiotemporal and kinematic gait parameters were measured using a movement analysis system. The symmetry index (SI), was calculated for selected gait parameters. The patients’ gait was evaluated by means of the WGS. It was shown that stance % SI, as well as hip and knee flexion-extension range of motion SI can most effectively be substituted by WGS-based estimations (coefficient of determination exceeding 80%). It was shown that information acquired based on the WGS can be used to obtain results comparable to those achieved in 3D assessment for selected SIs of spatiotemporal and kinematic gait parameters. The study confirms that observation of gait using the WGS, which is an ordinal scale, is consistent with the selected aims of 3D assessment. Therefore, the scale can be used as a complementary tool in gait assessment.

P2.028 Gait analysis in idiopathic normal pressure hydrocephalus

2008 ◽  
Vol 14 ◽  
pp. S50-S51
Author(s):  
A. Mavioglu ◽  
N. Kadioglu ◽  
E. Karakoc ◽  
F. Ersoz ◽  
K. Varli
Keyword(s):  
Gait Analysis ◽  
Normal Pressure Hydrocephalus ◽  
Normal Pressure ◽  
Idiopathic Normal Pressure Hydrocephalus

Gait analysis in idiopathic normal pressure hydrocephalus – which parameters respond to the CSF tap test?

2000 ◽  
Vol 111 (9) ◽  
pp. 1678-1686 ◽  
Author(s):  
H Stolze ◽  
J.P Kuhtz-Buschbeck ◽  
H Drücke ◽  
K Jöhnk ◽  
C Diercks ◽  
...  
Keyword(s):  
Gait Analysis ◽  
Normal Pressure Hydrocephalus ◽  
Normal Pressure ◽  
Idiopathic Normal Pressure Hydrocephalus ◽  
Tap Test

Prevalence of Alternative Diagnoses and Implications for Management in Idiopathic Normal Pressure Hydrocephalus Patients

Neurosurgery ◽  
2020 ◽  
Vol 87 (5) ◽  
pp. 999-1007 ◽  
Author(s):  
Mohamed Macki ◽  
Abhimanyu Mahajan ◽  
Rhonna Shatz ◽  
Ellen L Air ◽  
Marina Novikova ◽  
...  
Keyword(s):  
Normal Pressure Hydrocephalus ◽  
Clinical Care ◽  
Diagnostic Testing ◽  
Normal Pressure ◽  
Bayes Theorem ◽  
Idiopathic Normal Pressure Hydrocephalus ◽  
Alternative Diagnosis ◽  
Gait Parameters ◽  
Clinical Responses ◽  
Moca Score

Abstract BACKGROUND Following Bayes theorem, ventriculomegaly and ataxia confer only a 30% chance of idiopathic Normal Pressure Hydrocephalus (NPH). When coupled with positive responses to best diagnostic testing (extended lumbar drainage), 70% of patients recommended for shunting will not actually have NPH. This is inadequate clinical care. OBJECTIVE To determine the proportion of alternative and treatable diagnoses in patients referred to a multidisciplinary NPH clinic. METHODS Patients without previously diagnosed NPH were queried from prospectively collected data. At least 1 neurosurgeon, cognitive neurologist, and neuropsychologist jointly formulated best treatment plans. RESULTS Of 328 total patients, 45% had an alternative diagnosis; 11% of all patients improved with treatment of an alternative diagnosis. Of 87 patients with treatable conditions, the highest frequency of pathologies included sleep disorders, and cervical stenosis, followed by Parkinson disease. Anti-cholinergic burden was a contributor for multiple patients. Of 142 patients undergoing lumbar puncture, 71% had positive responses and referred to surgery. Compared to NPH patients, mimickers were statistically significantly older with lower Montreal Cognitive Assessment (MoCA) score and worse gait parameters. Overall, 26% of the original patients underwent shunting. Pre-post testing revealed a statistically significant improved MoCA score and gait parameters in those patients who underwent surgery with follow-up. CONCLUSION Because the Multidisciplinary NPH Clinic selected only 26% for surgery (corroborating 30% in Bayes theorem), an overwhelming majority of patients with suspected NPH will harbor alternative diagnoses. Identification of contributing/confounding conditions will support the meticulous work-up necessary to appropriately manage patients without NPH while optimizing clinical responses to shunting in correctly diagnosed patients.

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