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Öğe Evaluation of distal femoral and proximal tibial epiphyseal plate in bone age estimation with 3.0T MRI: a comparison of current methods(British Inst Radiology, 2023) Has, Büşra; Gürses, Murat Serdar; Altınsoy, Hasan BakiObjective: Dedouit et al, Kramer et al and Vieth et al defined different staging methods over different sequences in knee MRI for bone age determination. Our study aims to examine three different methods in which the maturation stages of the knee epiphyses are eval-uated by MRI in the same population, to compare the methods and results and evaluate them for some age thresholds and to discuss their applicability in forensic age estimation.Methods: In this study, 597 knee images obtained using a 3.0T MR scanner were evaluated retrospectively. The T-1 weighted and proton density-weighted sequences were evaluated by two observers. Knee bone develop-ment was staged on the femur and tibia, and descrip-tive statistics were calculated for each stage according to age and sex. Descriptive statistics were presented according to the age and sex of the cases, and intra-and interobserver agreements were evaluated by the kappa and & UKappa;w statistics obtained by the Fleiss approach.Results: Significant changes were found in stages depending on age. The intra-and interobserver agree-ment levels were very good (& UKappa; > 0.80) for each method. The methods of Dedouit, Kramer and Vieth can be used as an additional criteria for forensic age estimation for 14, 15, 18 and 21 year thresholds. Conclusion: Knee MRI stands out as an alternative modality for age estimation and it is necessary to prefer the method intended for the investigated age range with an individual-specific approach.Advances in knowledge: Our study stands out as the first study in which current classification methods were applied and compared in the same population for age estimation with knee MRI.Öğe Forensic age estimation in living individuals by 1.5 T magnetic resonance imaging of the knee: a retrospective MRI study(Taylor and Francis Ltd., 2018) Altınsoy, Hasan Baki; Alataş, Özkan; Gürses, Murat Serdar; İnanır, Nursel TürkmenOur aim is to analyse proximal tibial epiphysis and distal femoral epiphysis patterns according to the Dedouit staging method using 1.5 T magnetic resonance imaging (MRI) with fast spin echo (FSE) for proton density images. In addition, we discuss the results in relation to the literature for forensic age estimation. In this study, images belonging to 195 female and 277 male patients ranging in age from 10 to 30 years who had a knee MRI for any reason in our Radiology Clinic between January 2014 and December 2016 were retrospectively evaluated. According to the Dedouit et al. five-stage method, they were evaluated by two radiologists. The ? value was calculated for intra-observer and inter-observer compliance. The evaluation of knee epiphysis patterns from MRI is an alternative, efficient, radiation-free and non-invasive method that is helpful in forensic age estimation. In particular, stage 5 in distal femoral epiphysis can determine the 21st year of life in both sexes, and proximal tibial epiphysis could present evidence of age 18 in males. It should be used for evaluation in addition to other methods for determining skeletal system maturity. © 2018, © 2018 Informa UK Limited, trading as Taylor & Francis Group.