A new study finds that single-slice magnetic resonance imaging (MRI) is a fast and non-invasive way to measure intra-abdominal fat//.
Excessive intra-abdominal fat is known to be a major risk factor for developing heart disease, diabetes and other illnesses in children and teenagers.
Unlike the fat that lies just beneath the abdominal wall, forming skin folds or "love handles," internal fat located in and around the abdominal organs may actually be more damaging, predisposing children to adult diseases.
"Because metabolic abnormalities appear to be more closely associated with intra-abdominal fat tissue, it is critical to be able to reliably and accurately assess this fat tissue in order to identify children at risk," said the study's lead researcher Marilyn J. Siegel, M.D., professor of radiology and pediatrics at Mallinckrodt Institute of Radiology, Washington University School of Medicine in St. Louis, Missouri.
Results from the 2003-2004 National Health and Nutrition Examination Survey found that an estimated 18.8 percent of children (age 6 to 11) and 17.4 percent of adolescents (age 12 to 19) in the United States are overweight.
Current methods used to estimate body fat include anthropometry, which involves physical measurements including waist circumference, abdominal height and body mass index, and dual energy absorptiometry (DEXA), a whole-body scan that distinguishes lean mass from fat tissue. However, anthropometry is imprecise and DEXA requires exposure to ionizing radiation.
In Dr. Siegel's study, 30 adolescents had fat tissue measurements taken using anthropometry, DEXA and single-slice and whole-abdominal, multi-slice MRI. The study's 20 boys and 10 girls were between the ages of 10 and 18 and included nine overweight but non-diabetic individuals, 10 Type-2 diabetic and overweight patients, and 11 normal weight, non-diabetic adolescents.
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