scholarly journals Validity and reliability of a computer-assisted system method to measure axial vertebral rotation

2021 ◽  
Vol 0 (0) ◽  
pp. 0-0
Author(s):  
José Hurtado-Avilés ◽  
Vicente J. León-Muñoz ◽  
Jose Manuel Sanz-Mengibar ◽  
Fernando Santonja-Renedo ◽  
Pilar Andújar-Ortuño ◽  
...  
Keyword(s):  
Vertebral Rotation ◽  
Computer Assisted ◽  
Validity And Reliability ◽  
System Method ◽  
Axial Vertebral Rotation

scholarly journals Validity and Absolute Reliability of Axial Vertebral Rotation Measurements in Thoracic and Lumbar Vertebrae

2021 ◽  
Vol 11 (23) ◽  
pp. 11084
Author(s):  
José Hurtado-Avilés ◽  
Vicente J. León-Muñoz ◽  
Pilar Andújar-Ortuño ◽  
Fernando Santonja-Renedo ◽  
Mónica Collazo-Diéguez ◽  
...  
Keyword(s):  
Lumbar Vertebrae ◽  
Vertebral Rotation ◽  
Mean Bias Error ◽  
Bias Error ◽  
Thoracic Vertebrae ◽  
X Rays ◽  
Validity And Reliability ◽  
Axial Vertebral Rotation ◽  
Manual Methods ◽  
Absolute Reliability

Axial vertebral rotation (AVR) and Cobb angles are the essential parameters to analyse different types of scoliosis, including adolescent idiopathic scoliosis. The literature shows significant discrepancies in the validity and reliability of AVR measurements taken in radiographic examinations, according to the type of vertebra. This study’s scope evaluated the validity and absolute reliability of thoracic and lumbar vertebrae AVR measurements, using a validated software based on Raimondi’s method in digital X-rays that allowed measurement with minor error when compared with other traditional, manual methods. Twelve independent evaluators measured AVR on the 74 most rotated vertebrae in 42 X-rays with the software on three separate occasions, with one-month intervals. We have obtained a gold standard for the AVR of vertebrae. The validity and reliability of the measurements of the thoracic and lumbar vertebrae were studied separately. Measurements that were performed on lumbar vertebrae were shown to be 3.6 times more valid than those performed on thoracic, and with almost an equal reliability (1.38° ± 1.88° compared to −0.38° ± 1.83°). We can conclude that AVR measurements of the thoracic vertebrae show a more significant Mean Bias Error and a very similar reliability than those of the lumbar vertebrae.

scholarly journals Maximal Axial Vertebral Rotation in Adolescent Idiopathic Scoliosis: Is the Apical Vertebra the Most Rotated?

2020 ◽  
pp. 219256822094883
Author(s):  
Kristóf József ◽  
Ádám Tibor Schlégl ◽  
Máté Burkus ◽  
István Márkus ◽  
Ian O’Sullivan ◽  
...  
Keyword(s):  
Adolescent Idiopathic Scoliosis ◽  
Idiopathic Scoliosis ◽  
Cobb Angle ◽  
Axial Rotation ◽  
Cross Sectional Study ◽  
Vertebral Rotation ◽  
Rank Test ◽  
Cross Sectional ◽  
Apical Vertebra ◽  
Axial Vertebral Rotation

Study Design: Retrospective cross-sectional study. Objectives: It is generally believed that the apical vertebra has the largest axial rotation in adolescent idiopathic scoliosis. We investigated the relationship between apical axial vertebral rotation (apicalAVR) and maximal axial vertebral rotation (maxAVR) in both major and minor curves using biplanar stereo-imaging. Methods: EOS 2D/3D biplanar radiograph images were collected from 332 patients with adolescent idiopathic scoliosis (Cobb angle range 10°-122°, mean age 14.7 years). Based on the X-ray images, with the help of 3D full spine reconstructions Cobb angle, curvature level, apicalAVR and maxAVR were determined. These parameters were also determined for minor curves in Lenke 2, 3, 4, 6 type patients. Maximal thoracic rotation and maximal thoracolumbar/lumbar rotation were calculated. Statistical analysis was performed with descriptive statistics, Shapiro-Wilk test, and Wilcoxon signed-rank test. Results: The apical vertebrae were the most rotated vertebra in only 40.4% of the major curves, and 31.7% in minor curves. MaxAVR significantly exceeded apicalAVR values in the major curves ( P < .001) as well as in minor curves ( P < .001). The 2 parameters differed significantly in each severity group and Lenke type. Conclusions: The apical vertebrae were not the most rotated vertebra in more than half of cases investigated indicating that apicalAVR and maxAVR should be considered as 2 distinct parameters, of which maxAVR fully describes the axial dimension of scoliosis. Furthermore, the substitution of maxAVR for the apicalAVR should be especially avoided in double and triple curves, as the apical vertebra was even less commonly the most rotated in minor curves.

scholarly journals Fully automatic measurements of axial vertebral rotation for assessment of spinal deformity in idiopathic scoliosis

2013 ◽  
Vol 58 (6) ◽  
pp. 1775-1787 ◽  
Author(s):  
Daniel Forsberg ◽  
Claes Lundström ◽  
Mats Andersson ◽  
Ludvig Vavruch ◽  
Hans Tropp ◽  
...  
Keyword(s):  
Idiopathic Scoliosis ◽  
Spinal Deformity ◽  
Vertebral Rotation ◽  
Axial Vertebral Rotation ◽  
Fully Automatic

scholarly journals Developing of a Mathematical Model to Perform Measurements of Axial Vertebral Rotation on Computer-Aided and Automated Diagnosis Systems, Using Raimondi’s Method

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
José Hurtado-Aviles ◽  
Joaquín Roca-González ◽  
Konstantsin Sergeevich Kurochka ◽  
Jose Manuel Sanz-Mengibar ◽  
Fernando Santonja-Medina
Keyword(s):  
Least Squares Method ◽  
Medical Images ◽  
Regression Line ◽  
Mean Value ◽  
Vertebral Rotation ◽  
Automated Diagnosis ◽  
Simplified Approach ◽  
Computer Aided ◽  
Central Column ◽  
Axial Vertebral Rotation

Introduction. Axial vertebral rotation (AVR) is a basic parameter in the study of idiopathic scoliosis and on physical two-dimensional images. Raimondi’s tables are the most used method in the quantification of AVR. The development of computing technologies has enabled the creation of computer-aided or automated diagnosis systems (CADx) with which measurement on medical images can be carried out more quickly, simply, and with less intra and interobserver variabilities than manual methods. Although there are several publications dealing with the measurement of AVR in CADx systems, none of them provides information on the equation or algorithm used for the measurement applying Raimondi’s method. Goal. The aim of this work is to perform a mathematical modelling of the data contained in Raimondi’s tables that enable the Raimondi method to be used in digital medical images more precisely and in a more exact manner. Methods. Data from Raimondi’s tables were tabulated on a first step. After this, each column of Raimondi’s tables containing values corresponding to vertebral body width (D) were adjusted to a curve determined by AVR = f (d). Third, representative values of each rotation divided by D were obtained through the equation of each column D. In a fourth step, a regression line was fitted to the data in each row, and from its equation, the mean value of the D/d distribution is calculated (value corresponding to the central column, D = 45). Finally, a curve was adjusted to the obtained data using the least squares method. Summary and Conclusion. Our mathematical equation allows the Raimondi method to be used in digital images of any format in a more accurate and simplified approach. This equation can be easily and freely implemented in any CADx system to quantify AVR, providing a more precise use of Raimondi’s method, as well as being used in traditional manual measurement as it is performed with Raimondi tables.

scholarly journals PENGGUNAAN MEDIA BERBASIS KOMPUTER PADA MODEL PEMBELAJARAN DISCOVERY LEARNING

2019 ◽  
Vol 7 (2) ◽  
pp. 99
Author(s):  
Zelvia Sari ◽  
Thamrin Thamrin
Keyword(s):  
Learning Outcomes ◽  
Discovery Learning ◽  
Computer Assisted ◽  
Validity And Reliability ◽  
Test Analysis ◽  
Computer Based Learning ◽  
School Year ◽  
Quasi Experimental ◽  
Level Of Significance ◽  
Audio Video

The purpose of this study is to determine the effect of the use of computer assisted media in discovery learning models to learning outcomes of basic electrical and electronic training courses. The research subject is class X in the expertise of Audio Video (TAV) expertse. this type of research is a quasi-experimental. Students of class X TAV in SMK 1 Ranah Ampek Hulu are 29 school year 2018/2019 and here only take samples from the study as many as 25 students. The data of this study were taken by collecting scores four times through Pretest and Postest with an objective question of 15 items for a single meeting, the question also passed the different test questions, difficulty indexes, validity and reliability. From the four pretest and posttest meetings the results of the study can be seen using the normality test and hypothesis testing. From the results of the study there are average results of the pretest is 60.64 while the posttest is 82.88. The results of the t-test analysis obtained by tcount = 3.738 which is greater than t table = 1.711 at the 0.05 level of significance. Thus it can be concluded that the learning process using powerpoint media has an influence on the learning outcomes of class X TAV students of SMK 1 Ampek Hulu.Keywords: Computer Based Learning, Powerpoint, Discovery Learning (DL)

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