Ultrasonic visualisation of a suject, particularly of perfusion in the myocardium and other tissues, is performed using novel gas-containing contrast agent preparations which promote controllable and temporary growth of the gas phase in vivo following administration and can therefore act as deposited perfusion tracers. The preparations include a coadministerable composition comprising a diffusible component capable of inward diffusion into the dispersed gas phase to promote temporary growth thereof. In cardiac perfusion imaging the preparations may advantageously be coadministered with vasodilator drugs such as adenosine in order to enhance the differences in return signal intensity from normal and hypoperfused myocardial tissue respectively.
使用新型气体含量对比剂制剂进行超声可视化检查,特别是对心肌和其他组织的灌注进行检查,这些制剂可以促进在体内可控和暂时的气相生长,并因此可以作为沉积的灌注示踪剂。这些制剂包括一种可共同给予的组合物,其中包括一种可向分散的气相内部扩散的可扩散成分,以促进其暂时生长。在心脏灌注成像中,这些制剂可以有利地与血管扩张药物(如
腺苷)共同给予,以增强正常和低灌注心肌组织的回波信号强度差异。