[Determination of acoustic parameters from ultrasound raw and HF data--a comparison]

Different methods for determination of acoustical tissue parameters based on rf data acquisition as well as the analysis of B-mode image data are well established. Because of limitations of the dynamic range and the restricted control of the tgc and focus settings the analysis of image data is not achievable in clinical practice. On the other side rf data are not available in most of the clinical scanners. So the analysis of raw data can be used as an compromise. Raw- and rf-data of complete B-mode scans obtained form a set of test phantoms by a clinical ultrasound device (HDI 5000, Philips) in connection with the applied gain settings were analyzed. For different system settings the estimated parameters showed a good agreement with the acoustical properties of the phantoms.