Evaluation of attenuation coefficient and sound speed for the diagnosis of liver steatosis: magnetic resonance imaging proton density fat fraction as a reference. - Hayashi M; Sugimoto K; Kakegawa T; Takahashi H; Takeuchi H; Araki Y; Saito K; Nakayama R; Sakamaki K; Itoi T (Journal of medical ultrasonics (2001), 2026)