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    Innovative imaging approaches in intertrochanteric hip fractures: A retrospective analysis of density assessment using CT, X-ray and DEXA
    (2025) Deniz, Gülnihal; Kazez, Muhammed; Esmez, Omer; Gulsevincler, Ekrem; Genç, Hasan
    Intertrochanteric hip fractures in elderly patients are closely linked with underlying osteoporosis, making accurate bone quality assessment critical for both treatment planning and secondary fracture prevention. This study aimed to evaluate the feasibility of using computed tomography (CT) and X-ray as complementary or alternative tools to dual-energy X-ray absorptiometry (DEXA), with a focus on the contralateral (non-fractured) hip. A retrospective analysis was conducted on 48 elderly patients (33 females, 15 males) with unilateral intertrochanteric fractures. During the non-weight-bearing period, imaging of the opposite hip was reviewed. The cortical thickness index (CTI) was calculated from pelvic anteroposterior X-rays, proximal femoral density was quantified by CT in Hounsfield Units (HU), and T- and Z-scores were obtained from DEXA. Statistical relationships between demographic variables and bone parameters were analyzed with Pearson correlation, and interhip variability was explored. CTI, HU values, and DEXA-derived scores showed significant positive correlations, confirming consistency among the methods. Lower CTI and HU values were linked with advancing age and decreased bone mineral density (BMD). Age showed a negative correlation with CT mean, CTI, and total T-scores. Height was inversely correlated with Z-scores, while weight demonstrated negative associations with multiple parameters including T-scores, Z-scores, and CTI. Strong positive correlations were identified between CTI, CT mean, and densitometric scores. CTI derived from routine pelvic X-rays and HU values from CT scans can act as practical and widely available indicators of bone quality. When combined with or used in place of DEXA, these imaging parameters may improve preoperative planning, fracture risk stratification, and early osteoporosis recognition, particularly in centers where DEXA is limited or delayed. 
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    Öğe
    Radiological assessment of a potential accident scenario at the Akkuyu Nuclear Power Plant: TEDE, respirable time integrated air concentration, and ground surface deposition under different stability classes
    (Pergamon-Elsevier Science Ltd, 2026) Zengin, Abdullah; Gulsevincler, Ekrem
    The operational readiness and construction process of Akkuyu NGS, T & uuml;rkiye's first nuclear power plant, is ongoing. This situation necessitates atmospheric accident analyses for the nuclear power plant. While such accident analyses are generally available for nuclear facilities, the fact that one side of the Akkuyu site is surrounded by sea and the other by mountains makes it critical to perform radiological dispersion analyses that take into account different atmospheric stability conditions. The change and analysis of the total effective dose equivalent (TEDE), respirable time-integrated air concentration (RTIAC), and ground deposition parameters of the pollutant released after a plant accident under different stability classes is of critical importance in emergency planning. Using local meteorological data from 2019 to 2023 and the HotSpot dispersion code, key radiological parameters such as Total Effective Dose Equivalent (TEDE), respirable air concentration (RTIAC), and ground deposition were evaluated. The findings reveal a critical situation determined by atmospheric stability. In the highly unstable Class A, it causes severe and high dose exposure near the plant area, while in Class D analyses, dose exposure is at lower concentrations, but the spread affects a wider geographical area. These results highlight the importance of a specially designed emergency strategy for the Akkuyu NGS site that distinguishes between Class A emergency local response and Class D large-scale intervention and protective actions.