passages.id: split_4_test_594_passage
passages.type: progene_text
passages.text: These liposomal preparations retain high in vitro relaxivities ( 27.1 , 21.57 , 20.32 , 23.1 s(-1 ) mM(-1) , respectively ) and induce sustained MRI signal intensity enhancements ( 67.2 , 38.4 , 52.1 , 41.7 in arbitrary units , respectively ) .