Table 1.

Molar Relaxivity of Intact and Fragmented Gd(III)-bound Microbubbles.

	r1/Gd(III) (mM−1s−1)	r2/Gd(III) (mM−1s−1)	r1/MB (mM−1s−1)	r2/MB (mM−1s−1)
Intact MBs	−0.1 ± 0.1	3.8 ± 5.8	−3.6 ± 106	1.4 ± 108
Destroyed MBs	4.0 ± 0.4	120.2 ± 17.7	1.4 ± 108	4.3 ± 109