Segmental quantitative analysis of myocardial contrast echocardiography images using a bullseye representation - Murta Júnior, Luiz Otávio; Pazin-Filho, Antônio; Schmidt, André; Almeida Filho, Oswaldo César de; Marin-Neto, José Antônio; Maciel, Benedito Carlos (Computers in Cardiology, 2003)