Imaging Modalities Used in NAYK
U.S. Ultrasonography
NAYK, the most frequently used imaging modality for the diagnosis and follow-up US'dir. In U.S. fatty liver's ability to increase intracellular volume due to fat accumulation is seen as a diffuse increase in echogenicity. Comparative studies with liver biopsy, US'nin in demonstrating the sensitivity of 60-94%, specificity was found in the range 66-95%. U.S. examination of the posterior hepatic fibrosis without attenuation as a diffuse increase in echogenicity, it will always be made the separation of hepatic steatosis. In addition, U.S. and minimal, moderate and severe steatosis, as a result of a classification can be made and be given a quantitative measurement.
Another weak point is that the operator-dependent US. Three experienced operators conducted a retrospective U.S. study, the concordance rate between and within observers in the diagnosis of fatty liver and 72% and 76%, while intra-observer concordance rate the degree of adiposity was 55-68%. Fishbein and his colleagues, liver biopsy, MRI measurements and compared the findings of fatty liver US study, concluded that there is reliable in showing the amount of fat in the liver US.
Despite all this, easily available and cheap because of suspicion of fatty liver is still the preferred method US'dir first.
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