Validation of a new 2.5D radiographic index evaluating acetabular coverage using ACX software

2019 ◽  
Vol 30 (1) ◽  
pp. 16-21
Author(s):  
Shoichi Nishikino ◽  
Hiroshi Koyama ◽  
Hiroki Furuhashi ◽  
Hironobu Hoshino ◽  
Yukihiro Matsuyama
Keyword(s):  
Intraclass Correlation ◽  
Acetabular Coverage ◽  
Quantitative Parameter ◽  
Edge Point ◽  
Edge Angle ◽  
Observer Reliability ◽  
Pelvic Radiographs ◽  
Pelvic Radiograph ◽  
The Absolute ◽  
Radial Centre

Background: Several radiographic signs have been described to assess acetabular coverage. However, plain radiographs only have 2 dimensions (2D) and cannot accurately show acetabular coverage. Questions/purposes: We developed the ACX Dynamics software to calculate the radial centre-edge angle (RCEA), which represents the acetabular coverage of the femoral head at each acetabular edge point on the radial plane. This study validated the accuracy of the RCEA, as calculated by ACX Dynamics, as a quantitative parameter for acetabular coverage. Patients and methods: We reviewed the anteroposterior (AP) pelvic radiographs and computed tomography (CT) of 650 hips from 325 patients who presented with chief complaint of symptoms at the hip joint. Of 109 hip radiographs (68 patients) that satisfied the criteria, 50 randomised, blinded AP pelvic radiographs were chosen. We determined the absolute RCEA difference (°) [= RCEA ACX (°) – RCEA CT (°)], determined the correlation between RCEA ACX (°) and RCEA CT (°), and examined the RCEA’s intra-observer and inter-observer reliability in 50 hips. Results: The absolute RCEA difference from A45° to P75° was 1.9–3.1°. The correlation between the RCEA ACX (°) and RCEA CT (°) was > 0.7 in all lesions ( p < 0.001). Using the intraclass correlation coefficient, the intra-observer reliability of the RCEA was 0.83–0.97 in the whole range, which is a highly reproducible and reasonable parameter, and the inter-observer reliability was > 0.80 in A45°–P0°. Conclusions: The RCEA ACX (°) can be used as a simple quantitative parameter for assessing acetabular coverage using AP pelvic radiograph.

scholarly journals Usefulness of Pelvic Radiographs in the Initial Trauma Evaluation with Concurrent CT: Is Additional Radiation Exposure Necessary?

2018 ◽  
Vol 2018 ◽  
pp. 1-4 ◽  
Author(s):  
Anne K. Misiura ◽  
Autumn D. Nanassy ◽  
Jacqueline Urbine
Keyword(s):  
Trauma Center ◽  
Pediatric Trauma ◽  
Trauma Patients ◽  
Additional Information ◽  
Pelvic Radiographs ◽  
Pelvic Radiograph ◽  
Digital Radiograph ◽  
Urban Level ◽  
Level I ◽  
Pediatric Trauma Center

Trauma patients in a Level I Pediatric Trauma Center may undergo CT of the abdomen and pelvis with concurrent radiograph during initial evaluation in an attempt to diagnose injury. To determine if plain digital radiograph of the pelvis adds additional information in the initial trauma evaluation when CT of the abdomen and pelvis is also performed, trauma patients who presented to an urban Level I Pediatric Trauma Center between 1 January 2010 and 7 February 2017 in whom pelvic radiograph and CT of the abdomen and pelvis were performed within 24 hours of each other were analyzed. A total of 172 trauma patients had pelvic radiograph and CT exams performed within 24 hours of each other. There were 12 cases in which the radiograph missed pelvic fractures seen on CT and 2 cases in which the radiograph suspected a fracture that was not present on subsequent CT. Furthermore, fractures in the pelvis were missed on pelvic radiographs in 12 of 35 cases identified on CT. Sensitivity of pelvic radiograph in detecting fractures seen on CT was 65.7% with a 95% confidence interval of 47.79-80.87%. Results suggest that there is no added diagnostic information gained from a pelvic radiograph when concurrent CT is also obtained, a practice which exposes the pediatric trauma patient to unnecessary radiation.

Evaluating the Validity and Reliability of the Persian Version of American Orthopedic Foot and Ankle Society Midfoot Scale

2022 ◽  
pp. 193864002110682
Author(s):  
Amir Reza Vosoughi ◽  
Amin Kordi Yoosefinejad ◽  
Yasaman Safaei Dehbarez ◽  
Zeinab Kargarshouraki ◽  
Hamideh Mahdaviazad
Keyword(s):  
Scoring System ◽  
Discriminant Validity ◽  
Intraclass Correlation ◽  
Foot And Ankle ◽  
Validity And Reliability ◽  
Persian Version ◽  
Observer Reliability ◽  
Persian Language ◽  
Sf 36 ◽  
American Orthopaedic

Background The use of a valid and reliable outcome scoring system is crucial for evaluating the result of different treatment interventions. The aims of this study were to translate and culturally adapt the American Orthopaedic Foot and Ankle Society (AOFAS) midfoot scoring system into the Persian language and assess its validity and reliability. Method In total, 57 patients with midfoot injuries were enrolled. Forward-backward translation and cultural adaptation methods were used to develop the Persian version of AOFAS midfoot scoring system. Reliability and internal consistency were assessed using intraclass correlation coefficient (ICC) and Cronbach’s alpha. The discriminant and convergent validities of the scoring system were assessed using the total score of the mental and physical component of SF-36. Results The mean age of the participants was 46.2 ± 16.3 years. The intra-observer reliability of the totals core of the Persian version of AOFAS midfoot scoring system was 0.96 (confidence interval [CI]: 0.92-0.97) and the inter-observer reliability of the scoring system was 0.90 (CI: 0.86-0.95). The Persian version of AOFAS midfoot scoring system had acceptable convergence with physical component scoring system of SF-36 and its subscales (0.57); moreover, it had acceptable discriminant validity with the mental component of SF-36 and its subscales (0.36). Conclusion The Persian version of AOFAS midfoot is a reliable and valid instrument and could be used by Persian language clinicians and researchers. Level of Clinical Evidence: 3

scholarly journals Reliability of pre-operative diffusion tensor imaging parameter measurements of the cervical spine in patients with cervical spondylotic myelopathy

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Eugene Lee ◽  
Joon Woo Lee ◽  
Yun Jung Bae ◽  
Hyo Jin Kim ◽  
Yusuhn Kang ◽  
...  
Keyword(s):  
Spinal Cord ◽  
Diffusion Tensor Imaging ◽  
Cervical Spondylotic Myelopathy ◽  
Diffusion Tensor ◽  
Intraclass Correlation ◽  
Measurement Methods ◽  
Retest Reliability ◽  
Observer Reliability ◽  
Spinal Cord Level ◽  
Test Retest Reliability

Abstract The present study assessed test–retest and inter-observer reliability of diffusion tensor imaging (DTI) in cervical spondylotic myelopathy (CSM), as well as the agreement among measurement methods. A total 34 patients (12 men, 22 women; mean age, 58.7 [range 45–79] years) who underwent surgical decompression for CSM, with pre-operative DTI scans available, were retrospectively enrolled. Four observers independently measured fractional anisotropy (FA) values twice, using three different measurement methods. Test–retest and inter-observer reliability was assessed using intraclass correlation coefficients (ICCs). Overall, inter-observer agreements varied according to spinal cord level and the measurement methods used, and ranged from poor to excellent agreement (ICC = 0.374–0.821), with relatively less agreement for the sagittal region of interest (ROI) method. The radiology resident and neuro-radiologist group showed excellent test–retest reliability at almost every spinal cord level (ICC = 0.887–0.997), but inter-observer agreements varied from fair to good (ICC = 0.404–0.747). Despite excellent test–retest reliability of the ROI measurements, FA measurements in patients with CSM varied widely in terms of inter-observer reliability. Therefore, DTI parameter data should be interpreted carefully when applied clinically.

scholarly journals MRI-based static and functional assessment of complex hip deformities in comparison with CT: a validation study

2020 ◽  
Vol 33 (6) ◽  
pp. 829-838
Author(s):  
Sophia Blum ◽  
Lea Franken ◽  
Albrecht Hartmann ◽  
Falk Thielemann ◽  
Verena Plodeck ◽  
...  
Keyword(s):  
Femoral Head ◽  
Linear Regression Analysis ◽  
Intraclass Correlation ◽  
Alpha Angle ◽  
Acetabular Coverage ◽  
Mri Findings ◽  
Perfect Agreement ◽  
Femoral Torsion ◽  
Center Edge ◽  
Hip Morphology

Abstract Objective This study aimed at investigating the agreement between predefined quantitative parameters of hip morphology derived from magnetic resonance imaging (MRI) and virtual range of motion (ROM) analysis using computed tomography (CT) as standard of reference. Methods Twenty patients (13 females, 7 males, 16–59 years) with hip deformities underwent MRI prior to surgery. Clockwise alpha angle, femoral head and neck diameter, collum caput diaphysis angle, femoral torsion, center-edge angles, acetabular coverage of the femoral head, sourcil angle, and acetabular anteversion were measured. Additionally, tern single and combined movements were simulated using a motion analysis program. The MRI findings were compared with the corresponding results obtained by CT. Correlation of MRI with CT was assessed using different statistical methods (intraclass correlation coefficient, Bland–Altmann plot, two one-sided t test), and linear regression analysis was performed. Results The results showed near-perfect intraclass correlation coefficients (ICCs) for anteversion (0.95), acetabular sector angles (0.98–0.99), sourcil angle (0.95), and acetabular coverage (anterior 0.96, posterior 0.99). Intermethod correlation for femoral parameters showed almost perfect agreement except for the alpha angle (0.73–0.97). No significant proportional bias was detected for traditional acetabular and femoral parameters. ROM analysis was performed for 370 movements in 37 hips. For 78.4% (290/370) of the movements analysed, neither CT nor MRI detected impingement across the physiological ROM. For 18.6% (69/370) of the movements, impingement was detected by both CT and MRI, while 2.2% (8/370) of the movements with impingement in CT showed no impingement in MRI, and 0.8% (3/370) of the movements with impingement in MRI had no corresponding result in CT. Conclusion Finally, it was concluded that MRI-based assessment of hip morphology and virtual ROM analysis is feasible and can be performed with good intermethod agreement in comparison to the gold standard (CT). Therefore, MRI appears to be substantially equivalent to CT for use in virtual ROM analysis and so may reasonably be used in place of CT for this purpose.

scholarly journals Lateral acetabular labral length is inversely related to acetabular coverage as measured by lateral center edge angle of Wiberg

2016 ◽  
Vol 3 (3) ◽  
pp. 190-196 ◽  
Author(s):  
Brian D. Petersen ◽  
Bryan Wolf ◽  
Jeffrey R. Lambert ◽  
Carolyn W. Clayton ◽  
Deborah H. Glueck ◽  
...  
Keyword(s):  
Acetabular Coverage ◽  
Edge Angle ◽  
Center Edge ◽  
Lateral Center Edge Angle ◽  
Center Edge Angle

scholarly journals Computer-based three-dimensional measurement of carpal alignment: measurement techniques and normal ranges

2021 ◽  
pp. 175319342110396
Author(s):  
Robert M. J. Sippo ◽  
Theresa E. K. Höglund ◽  
Eero Waris
Keyword(s):  
Measurement Techniques ◽  
Intraclass Correlation ◽  
Three Dimensional ◽  
Reference Database ◽  
Mean Values ◽  
Observer Reliability ◽  
Normal Ranges ◽  
Asymptomatic Volunteers ◽  
Ct Analysis ◽  
Computer Based

The three-dimensional carpal alignment was measured in the neutral wrist position in 121 asymptomatic volunteers using computer-based cone-beam CT analysis. Normal values and the reliability of the automated analysis are reported. An analysis software based on segmentation of CT images and mathematical modelling was used to determine several axis variants based on different landmarks and to calculate the intercarpal angles automatically. Twenty wrists were imaged twice to determine intra-observer reliability. Mean values using the preferred axis variants were: scapholunate angle 57° (SD 9°), radiolunate angle 2° (SD 10°), lunocapitate angle –14° (SD 9°). Using alternate axis variants notably changed the angles produced. The intra-observer reliability of the analysis was excellent (mean intraclass correlation coefficient 0.97, SD 0.03). Computer-based CT analysis enables highly reproducible and automated assessment of carpal alignment. This study provides a reference database for measurement techniques and normal carpal angle values in three-dimensional imaging.

scholarly journals The reliability of the augmented Lehnert-Schroth and Rigo classification in scoliosis management

2021 ◽  
Vol 77 (2) ◽  
Author(s):  
Burçin Akçay ◽  
Tuğba Kuru Çolak ◽  
Adnan Apti ◽  
İlker Çolak ◽  
Önder Kızıltaş
Keyword(s):  
Treatment Plan ◽  
Intraclass Correlation ◽  
Correlation Coefficients ◽  
Error Measurement ◽  
X Rays ◽  
X Ray ◽  
Intraclass Correlation Coefficients ◽  
Observer Reliability ◽  
The Individual ◽  
Curve Patterns

Background: In pattern-specific scoliosis exercises and bracing, the corrective treatment plan differs according to different curve patterns. There are a limited number of studies investigating the reliability of the commonly used classifications systems.Objective: To test the reliability of the augmented Lehnert-Schroth (ALS) classification and the Rigo classification.Methods: X-rays and posterior photographs of 45 patients with scoliosis were sent by the first author to three clinicians twice at 1-week intervals. The clinicians classified images according to the ALS and Rigo classifications, and the data were analysed using SPSS V-16. Intraclass correlation coefficients (ICCs) and standard error measurement (SEM) were calculated to evaluate the inter- and intra-observer reliability.Results: The inter-observer ICC values were 0.552 (ALS), 0.452 (Rigo) for X-ray images and 0.494 (ALS), 0.518 (Rigo) for the photographs. The average intra-observer ICC value was 0.720 (ALS), 0.581 (Rigo) for the X-ray images and 0.726 (ALS) and 0.467 (Rigo) for the photographs.Conclusions: The results of our study indicate moderate inter-observer reliability for X-ray images using the ALS classification and clinical photographs using the Rigo classification. Intra-observer reliability was moderate to good for X-ray images and clinical photographs using the ALS classification and poor to moderate for X-ray and clinical photographs using the Rigo classification.Clinical implications: Pattern classifications assist in creating a plan and indication of correction in specific scoliosis physiotherapy and pattern-specific brace applications and surgical treatment. More sub-types are needed to address the individual patterns of curvature. The optimisation of curve classification will likely reduce failures in diagnosis and treatment.

Sign in / Sign up

Export Citation Format

Share Document