Contrast-enhanced power doppler sonography: assesment of revascularization flow in legg-calve-perthes' disease - Doria, Andrea S.; Guarniero, Roberto; Cunha, Fabiano G.; Modena, Marcelo; Godoy, Rui M. de Junior; Luzo, Carlos; Boelliger Neto, Raul; Molnar, Laszlo J.; Cerri, Giovanni G. (Ultrasound in Medicine & Biology, 2002)