Ahmet Uzun

Unbiased estimation of the liver volume by the Cavalieri principle using magnetic resonance images

OBJECTIVE It is often useful to know the exact volume of the liver, such as in monitoring the effects of a disease, treatment, dieting regime, training program or surgical application. Some non-invasive methodologies have been previously described which estimate the volume of the liver. However, these preliminary techniques need special software or skilled performers and they are not ideal for daily use in clinical practice. Here, we describe a simple, accurate and practical technique for estimating liver volume without changing the routine magnetic resonance imaging scanning procedure. MATERIALS AND METHODS In this study, five normal livers, obtained from cadavers, were scanned by 0.5 T MR machine, in horizontal and sagittal planes. The consecutive sections, in 10 mm thickness, were used to estimate the whole volume of the liver by means of the Cavalieri principle. The volume estimations were done by three different performers to evaluate the reproducibility. RESULTS There are no statistical differences between the performers and real liver volumes (P > 0.05). There is also high correlation between the estimates of performers and the real liver volume (r = 0.993). CONCLUSION We conclude that the combination of MR imaging with the Cavalieri principle is a non-invasive, direct and unbiased technique that can be safely applied to estimate liver volume with a very moderate workload per individual.

Morphometric analysis of nasal shapes and angles in young adults

Introduction The size, angle, shape and type of nose are a signature indicating race, age and sex.

Original articleMorphometric analysis of nasal shapes and angles in young adultsMorfométrica análise de nasais formas e ângulos em adultos jovens

Introduction The size, angle, shape and type of nose are a signature indicating race, age and sex.

Anthropometric analysis of the nose in young Turkish men and women

PURPOSE The aim of the study was to describe and compare values for nasal anthropometric measurements using the landmark-based geometric morphometric technique in young healthy Turkish men and women. MATERIALS AND METHODS A total of 115 young adults (56 men and 59 women) whose ages ranged from 18 to 30 years (mean age 21.22 years) were included in the analysis. RESULTS For men the mean nasal bridge length, total length, width and root width were 52.95, 54.38; 35.24 and 17.83 mm, respectively, and in women they were 47.81 and 50.90; 31.59 and 17.36 mm, respectively. The columella length and width were 12.76 and 5.77 mm, respectively, for men, and for women they were 11.88 and 5.60 mm, respectively. CONCLUSION Data collected in the present research could serve as a database for the quantitative description of nasal morphology in young Turkish adults. It may also be used in sex based data banks for the Turkish population.