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[5]
Detection of liver metastases by pulse inversion harmonic imaging during Levovist late phase: comparison with conventional ultrasound and helical CT in 160 patients[J] . Emilio Quaia,Michele Bertolotto,Balázs Forgács,Alessandra Rimondini,Martina Locatelli,Roberto Mucelli.European Radiology . 2003 (3)