[Gd(TTDA-BOM)]2- is a newly developed paramagnetic contrast agent. The ligand, TTDA-BOM, bears a benzyloxymethyl group so that the lipophilicity is increased. The water exchange rate for [Gd(TTDA-BOM)] 2- is significantly higher than that of [Gd(DTPA)]2- and [Gd(BOPTA)]2-. In addition, the bound relaxivity of this Gd (III) complex has a remarkably high value with HSA. Therefore, it has potential to be used as a blood pool contrast agent for MRI. The aim of this study is to investigate the characterization and imaging behavior of NMG 2[Gd(TTDA-BOM)] in normal rat livers and hearts using a 3T high field whole-body MR scanner. The high field MR scanner is expected to have a higher signal to noise ratio. The relaxivities r1 and r2 for [Gd(TTDA-BOM)]2- at 3T are 5.97 mM-1 s-1 and 7.99 mM-1 s-1 respectively, which are higher than those for [Gd(DTPA)]2 (r1=4.64 mM-1 s-1 and r2=5.08 mM-1 s-1). The dynamic MRI studies show that there is marked enhancement in livers and hearts right after the bolus injection and the enhancement ratios keep high until two hours. In conclusion, [Gd(TTDA-BOM)]2- might have a good potential in both cardiovascular and hepatobiliary applications.