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Öğe Accuracy of skeletal age assessment in children from birth to 6 years of age with the ultrasonographic version of the Greulich-Pyle atlas(Amer Inst Ultrasound Medicine, 2003) Bilgili, Y.; Hizel, S.; Kara, S.A.; Sanli, G.; Erdal, H.H.; Altinok, D.Objectives. For the evaluation of skeletal age, the methods of Greulich-Pyle and Tanner-Whitehouse are generally used in clinical practice. Our investigation was undertaken to determine whether the ultrasonographic version of the Greulich-Pyle atlas is capable of assessing skeletal age. If so, we aimed to describe the standards for the ultrasonographic version of the Greulich-Pyle atlas for each year during the first 6 years of life. Methods. Ninety-seven subjects underwent left hand and wrist radiography and ultrasonographic examination for bone age assessment during a 1.5-year study. Estimated bone ages derived from the plain radiography and "hand and wrist ultrasonography charts" interpreted by use of the Greulich-Pyle atlas were compared statistically. Results. The estimated bone ages from plain radiography and hand and wrist ultrasonography charts interpreted by use of the Greulich-Pyle atlas were significantly correlated; 71.1% of male patients had the same age in both methods, and in 84.4% of patients, the difference was less than 6 months. In 65.5% of female patients, both methods revealed the same age, and in 88.5% of them, the difference was less then 6 months. Conclusions. The ultrasonographic version of the Greulich-Pyle atlas can be used to estimate bone age even in ultrasonography departments. This method is highly correlated and a valid alternative to plain radiography for bone age estimation. This enables estimation of skeletal age in ultrasonography departments easily without exposing the patient to radiation.Öğe Contrast media induces hypoperfusion in kidneys with ureteral stone: Doppler us study(Elsevier Science Inc, 2005) Ünal, B.; Kara, S.; Bilgili, Y.We aimed to assess the hemodynamic effects of nonionic low-osmolarity contrast media (CM) on kidneys with ureteral stone (KUS). A total of 16 patients with KUS (group A) and 25 control patients (group B) were evaluated with Doppler ultrasound (US) bilaterally for main (MRA), interlobar (ILA) and arcuate renal arteries (ARA), before and 15 min after CM for IV pyelography. Peak systolic (PSV) and end diastolic velocities (EDV) and resistance index (RI) were measured. Data were analyzed by ANOVA and t-test. In group A. CM induced increase in PSV of MRA of contralateral kidney (p = 0.021) and decrease in PSV of ILA (p = 0.024) decrease in PSV and EDV and increase in RI of ARA of KUS (p = 0.010. 0.005. 0.027. respectively). CM induced hypoperfusion in KUS and compensatory changes in contralateral kidneys. similar to the effects of diuresis or mannitol. We conclude that the effect of CM on KUS is related to its osmolar load. (C) 2005 World Federation for Ultrasound in Medicine Biology.Öğe Diffusion Changes in the Vitreous Humor of the Eye during Aging(Amer Soc Neuroradiology, 2011) Meral, I.; Bilgili, Y.BACKGROUND AND PURPOSE: The inability to image the vitreous humor of the eye adequately hinders a complete understanding of its normal structure and the changes occurring in aging and disease. The purpose of the present study was to reveal normative data and age-related changes of the vitreous humor by using DWI. MATERIALS AND METHODS: A total of 160 patients were enrolled in the present study. Patients were divided into 8 groups according to decade of age, and each group was of equal size with 20 patients. The ADCs were determined for each vitreous humor. Each determination was obtained by using average regions of interest of 50 +/- 2 mm(2). ADC values were then plotted against age. RESULTS: The ADC values obtained from group 0 (0-10 years of age) were statistically different from those of all other groups (P < .05). Group 1 (11-20 years of age) was statistically different from groups 3, 5, 6, and 7 (P < .05). A trend toward increased ADC values with increasing age was not statistically significant. CONCLUSIONS: Besides the statistically significant difference between pediatric and adult patients, a statistically insignificant trend of increased ADC values among aging adults has been demonstrated. These normative data contribute to our understanding of how DWI can aid in the diagnosis of age-related changes in eye health and function.Öğe Simple evaluation of liver size on erect abdominal plain radiography(W B Saunders Co Ltd, 2004) Ünal, B.; Bilgili, Y.; Kocacikli, E.; Bagcier, S.; Huvaj, S.; Kara, S.We aimed to develop criteria of hepatomegaly on erect plain radiography by comparing the results with those of ultrasonography. Right-sided longitudinal length and second lumbar vertebra ratio, of 22 cm and 6, respectively, detected hepatomegaly with over 90% accuracy, with higher success rates for the lumbar vertebral ratio. Corresponding values for normal size were 20 cm and 5. Sonography revealed high correlation with these results. We concluded that liver size measured on erect plain radiography was larger than but similar to that measured by sonography, and that right-sided longitudinal length and the lumbar vertebral. ratio are reliable criteria showing good correlation with the results of sonography.
