The measurement of visceral adipose tissue is very important as the visceral fat plays a major role in the metabolic disorders of the obese people. Computed tomography is the reference method for intra-abdominal fat evaluation, but it is expensive, with fairly limited availability and employs ionizing radiations. Waist circumference, waist/hip ratio and sagittal diameter are considered representative measurements of visceral fat. However they remain indirect means for calculating intra-abdominal adipose deposits. Sonography has been proposed as a noninvasive technique for measuring visceral fat. In this study subcutaneous and intra-abdominal thickness were measured by sonography on 29 premenopausal obese females. The results were compared with the anthropometric methods and with the subcutaneous and visceral adipose tissue areas measured by computed tomography. Ultrasound intra-abdominal thickness was the variable with highest correlation coefficient with visceral fat areas. In the predictive equations for visceral adipose tissue area besides intra-abdominal thickness, subcutaneous fat thickness and waist circumference was included. The intra-abdominal thickness showed significant correlations with the blood pressure level and triglyceride level. The correlation between sonography and computed tomography was highest as visceral fat area increased. Sonography is a useful method for measuring visceral adipose tissue.
Visceral obesity; Diagnosis; Sonography
