ABSTRACT
Quantitative measurements in obstetrics and gynecology are mainly geometrical and Doppler. Although these methods to a large extent make the quantitative assessment of pregnancy possible and are under further development, tissue characterization would open new horizons in this area of diagnostics. Simple ovarian and dermoid cysts were studied with gray-level histograms, and there was a clear difference between these two tissues: normal uterine muscle and fibromyoma tissue. Radio frequency ultrasound histogram was recorded and evaluated in some tissues, and the results showed the difficulty of interpretation and poor usefulness in clinical tissue characterization. Therefore, the main technique has been the investigations of the attenuation coefficient obtained from frequency-dependent attenuation (FDA) expected to be the most useful in tissue characterization. The attenuation of ultrasound during insonation and reflection in living tissue will reflect the ultrasound absorption and scattering in the tissue, and the attenuation coefficient determination has been carried out in living tissue.
