| 摘要 |
This invention relates to methods of x-ray diagnostic imaging the blood pool, liver, spleen and/or lymph system of a mammal comprising administering a contrast effective amount of a contrast agent having the structure: <IMAGE> wherein: X is O, S or NR4; R3 is alkyl containing 1 to 17 carbon atoms or (CH2)wCO2R5; and R1, R2, R4, R5, n and w are as defined herein. |
