scholarly journals Spinal postural alignment measurements using markerless digital photography

2020 ◽  
Vol 28 (3) ◽  
pp. 230949902096083
Author(s):  
Mitsumasa Hida ◽  
Chikamune Wada ◽  
Ryota Imai ◽  
Kodai Kitagawa ◽  
Shogo Okamatsu ◽  
...  
Keyword(s):  
Measurement Method ◽  
Digital Photography ◽  
Skin Surface ◽  
Altman Analysis ◽  
Excellent Correlation ◽  
Block Method ◽  
Noninvasive Measurements ◽  
Postural Alignment ◽  
Minor Addition ◽  
Craniovertebral Angle

Background: A device that can measure posture alignment repeatedly is important for the prevention of hyperkyphosis. Objective: We devised a markerless measurement method for hyperkyphosis using digital photography and investigated the correlation with other noninvasive measurements and the validity and accuracy of this method. Methods: The study included 27 participants. The craniovertebral angle in supine (CVAS) and craniohorizontal angle in supine (CHAS) were calculated from digital photographs of the head and neck areas of the studied subjects with ImageJ. The correlations of CVAS and CHAS with the kyphosis index (KI) and block method (BM) were investigated. Intrarater correlation coefficient and Bland–Altman analyses were used to verify the reliability and accuracy of the measured results. Results: CHAS exhibited an excellent correlation with the KI and the BM. The intra- and interrater reliabilities of CHAS were almost perfect. Bland–Altman analysis revealed that CHAS was associated with minor addition errors. Conclusion: CHAS founded an excellent correlation and reliability with the conventional spinal postural alignment measurements. The addition error suggested that the manual was needed to confirm the landmark. The CHAS is a method used to measure the spinal postural alignment in a supine position without markers and without exposing the skin surface.

scholarly journals Non-Contact Respiration Measurement Method Based on RGB Camera Using 1D Convolutional Neural Networks

Sensors ◽  
2021 ◽  
Vol 21 (10) ◽  
pp. 3456
Author(s):  
Hyeon-Sang Hwang ◽  
Eui-Chul Lee
Keyword(s):  
Measurement Method ◽  
Respiratory Diseases ◽  
Region Of Interest ◽  
Average Error ◽  
Measurement Technology ◽  
Altman Analysis ◽  
Clinical Scenarios ◽  
Actual Environment ◽  
Error Bias ◽  
Robust To Noise

Conventional respiration measurement requires a separate device and/or can cause discomfort, so it is difficult to perform routinely, even for patients with respiratory diseases. The development of contactless respiration measurement technology would reduce discomfort and help detect and prevent fatal diseases. Therefore, we propose a respiration measurement method using a learning-based region-of-interest detector and a clustering-based respiration pixel estimation technique. The proposed method consists of a model for classifying whether a pixel conveys respiration information based on its variance and a method for classifying pixels with clear breathing components using the symmetry of the respiration signals. The proposed method was evaluated with the data of 14 men and women acquired in an actual environment, and it was confirmed that the average error was within approximately 0.1 bpm. In addition, a Bland–Altman analysis confirmed that the measurement result had no error bias, and regression analysis confirmed that the correlation of the results with the reference is high. The proposed method, designed to be inexpensive, fast, and robust to noise, is potentially suitable for practical use in clinical scenarios.

scholarly journals Evidence for the use of the Alere Afinion™ AS100 for measuring the levels of C-reactive protein in an elderly South African population

2020 ◽  
pp. 71-76
Author(s):  
I Mpofana ◽  
M Nyirenda ◽  
N Abbai
Keyword(s):  
Linear Regression Analysis ◽  
Reference Method ◽  
Altman Analysis ◽  
Concordance Correlation ◽  
Excellent Correlation ◽  
C Reactive Protein ◽  
Serum Samples ◽  
Cvd Risk ◽  
Bland Altman Analysis ◽  
Reactive Protein

Introduction: This study evaluated the performance of the Alere Afinion™ AS100 analyser for the measurement of C-reactive protein (CRP) levels in a population of older adults from South Africa. Methods: This study was a sub-study of the Sexual Health, HIV infection and comorbidity with non-communicable diseases among Older Persons (SHIOP) study. The median age of SHIOP participants was 61 years (interquartile range 12). Serum samples collected through SHIOP were used to measure CRP levels on the Alere Afinion™ AS100 (Point-of-care) and ABX Pentra 400 (reference method), respectively. Bland–Altman analysis and Lin’s concordance correlation coefficients were used to assess the agreement between the two analysers. Results: A total of 183 serum samples were tested in the study. The Alere Afinion™ AS100 median values for CRP were 9.5 mg/L and 11.5 mg/L in women and men respectively (p = 0.275). The ABX Pentra 400 median levels were lower with 5.6 mg/L and 3.6 mg/L for women and men (p = 0.027), respectively. Bland–Altman analysis and linear regression analysis showed an excellent correlation between the Pentra and Afinion analysers, with a Lin’s concordance correlation coefficient of 0.971. The Alere Afinion™ AS100 was able to correctly classify > 90% (165/183) of the CRP results when compared to the ABX Pentra 400. Conclusion: This study showed that the Alere Afinion™ AS100 had an excellent correlation with a standard laboratory method. However, the Afinion™ AS100 did not correlate well at elevated CRP levels. This may not be clinically significant since the cut-points for CVD risk are at much lower levels.

scholarly journals Measuring the roundness deviation in the Vblock measurement method

2018 ◽  
Vol 178 ◽  
pp. 08016
Author(s):  
Pavlina Toteva ◽  
Dimka Vasileva ◽  
Krasimira Koleva
Keyword(s):  
Measurement Method ◽  
Block Method ◽  
Direction Angle ◽  
Measurement Direction ◽  
Roundness Deviation ◽  
Form Deviation ◽  
Measurement Capabilities ◽  
Dimension Ratio

In this paper the measurement capabilities of form deviation of cylindrical surfaces using V-Block method are studied. The paper presents the influence of the V - Block angle to the ratio coefficient of dimension, and the ratio coefficient of form deviation on the k-harmonic. The equations for the dimension ratio coefficient and the form ratio coefficient of kharmonic are obtained. These equations give the opportunity to choose the most appropriate combination for the V-block angle and the measurement direction, angle β. Studies have been made using V-Blocks with the most common angles by symmetrical and non-symmetrical measurement schemes. Using V-Blocks for measurement is rational and appropriate in cases where for all measured details the number of harmonics are known in advance.

scholarly journals Coronal Spinal Postural Alignment Screening Tool using Markerless Digital Photography

2021 ◽  
Vol 6 (2) ◽  
pp. 965-970
Author(s):  
Mitsumasa Hida ◽  
Ayuna Hasegawa ◽  
Sachiyo Kamitani ◽  
Yumi Kamitani ◽  
Kodai Kitagawa ◽  
...  
Keyword(s):  
Screening Tool ◽  
Digital Photography ◽  
Postural Alignment

scholarly journals Infrared Thermography and Vascular Disorders in Diabetic Feet

2019 ◽  
Vol 14 (1) ◽  
pp. 28-36 ◽  
Author(s):  
Arjaleena Ilo ◽  
Pekka Romsi ◽  
Jussi Mäkelä
Keyword(s):  
Diabetes Mellitus ◽  
Infrared Thermography ◽  
Normal Skin ◽  
Ankle Brachial Index ◽  
Skin Surface ◽  
Limb Amputation ◽  
Noninvasive Measurements ◽  
Foot Complications ◽  
Diagnostic Potential ◽  
N 93

Aim: Diabetes mellitus (DM) and related foot complications constitute a growing healthcare burden. Diabetes mellitus is associated with lower-limb amputation, but diabetic foot assessment is challenging. Here, we evaluated a novel noninvasive diagnostic method—infrared thermography (IRT) —assessing its diagnostic potential compared to conventional noninvasive measurements. Methods: This study included patients with DM ( n = 118) and healthy controls ( n = 93). All participants underwent ankle brachial index and toe pressure (TP) measurements, and IRT using a standardized protocol with temperature measurement at five foot areas. Results: Compared to controls, patients with DM generally had warmer feet and exhibited a significantly greater temperature difference between feet ( P < .001). Mean temperatures were highest in patients with DM with neuroischemia, followed by neuropathy. Patients with DM with angiopathy showed the lowest mean temperature—similar to controls and noncomplicated diabetics. Mean temperatures at all measurement sites were significantly higher with abnormal TP (<50 mmHg) than normal TP (≥50 mmHg) ( P < .001). Infrared thermography revealed differences between angiosome areas, subclinical infections, and plantar high-pressure areas. Conclusion: Infrared thermography revealed local temperature differences in high-risk diabetic feet. Normal skin surface temperature varies between individuals, but in combination with other tools, IRT might be useful in clinical screening. ClinicalTrials ID: 14212016

Bilateral Measurement of Resting Calcaneal Stance Position and Tibial Varum Using Digital Photography and Standardized Positioning Protocols

2009 ◽  
Vol 99 (3) ◽  
pp. 198-205 ◽  
Author(s):  
Shannon M. Mahar ◽  
Lori A. Livingston
Keyword(s):  
Young Adults ◽  
Measurement Method ◽  
Pain Syndrome ◽  
Digital Photography ◽  
Patellofemoral Pain Syndrome ◽  
Patellofemoral Pain ◽  
Overuse Injuries ◽  
Standardized Measurement ◽  
The Right ◽  
Asymptomatic Control

Background: Excessive calcaneal eversion and tibial varum are thought to predispose individuals to overuse injuries such as patellofemoral pain, yet investigations of this relationship have yielded equivocal results. Differences in the methods used, including stance position, may contribute to the observed differences. Methods: Forty-six young adults (29 asymptomatic control patients and 17 patients with patellofemoral pain syndrome) participated. Resting calcaneal stance position and tibial varum were measured using a digital photographic-goniometric method while participants adopted three upright, weightbearing stance positions (self-selected, Romberg, and single-limb right or left). Data were collapsed and analyzed by group (asymptomatic, symptomatic) or limb status (uninjured, injured), stance, and limb (right, left). Results: Mean resting calcaneal stance position and tibial varum values differed significantly among the three stance conditions, whereas differences between groups, limb status, and limb were not observed. Pearson product moment correlations revealed no relationship between measures derived under the differing stance conditions (r = −0.08 to −0.37, P &gt; .05) and only weak to moderate relationships in resting calcaneal stance position and tibial varum measures between the right and left limbs (r = 0.37 to 0.71, P &lt; .01). Conclusions: If differences in reported values for resting calcaneal stance position and tibial varum in an individual, between groups, or from study to study are to be interpreted as true differences or as products of the measurement method used, a standardized measurement method must be established and methods must be accurately reported. (J Am Podiatr Med Assoc 99(3): 198–205, 2009)

scholarly journals The Effect of Prolonged Time of Tablet Usage on Postural Alignment in Children

2018 ◽  
Vol 6 (6) ◽  
Author(s):  
Marwa M. Ibrahim ◽  
Nadia L. Radwan
Keyword(s):  
Tilt Angle ◽  
Head Tilt ◽  
Handheld Devices ◽  
Sitting Posture ◽  
Postural Alignment ◽  
Group 2 ◽  
Craniovertebral Angle ◽  
Postural Analysis ◽  
Shoulder Angle ◽  
Group 1

Background: Smart handheld devices are nowadays forming a great impact on people’s health. The prolonged use of these devices is known to be associated with musculoskeletal disorders in the upper limb. The aim of this study: was to examine the effect of prolonged usage of tablets on postural alignment in children.Methods: 60 female children,  their age ranged from 7 to 10 years, were participated in this study, and they were randomly divided equally into 2 groups according to the total interrupted time spent using the tablets, reported by their parents. Group (1) those who use tablets less than 3hours per day, and group (2) those who use tablets from 3 to 6 hours per day. Assessments and comparisons between the two groups were applied by using the bio photogrammetric postural analysis to measure the Craniovertebral angle (CVA), The Head tilt angle (HTA), Forward Shoulder Angle (FSA), Thoracic kyphotic angle (TKA), Lumbar lordotic angle (LLA) and Pelvic tilt angle (PTA).Results:The findings indicated significant differences between the examined groups regarding the CVA, HTA, FSA,TKA, while there were no significant differences could be recorded relative to LLA and PTA. Conclusion:Prolonged sitting posture for children who use tablets can produce postural alignment changes such as FHP, rounded shoulders and increased kyphosis with predicted other spinal changes at lumbar and pelvic regions and associated forward musculoskeletal disorders. 

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