Volcano Corporation (NASDAQ: VOLC), a leading company focused on improving patient and economic outcomes on a global basis by developing and delivering innovative minimally invasive coronary and peripheral visualization, physiology diagnostics and therapies, today announced that more than 1,000 systems have been activated with its instant wave-Free Ratio™, or iFR® Modality software, allowing physicians and patients around the globe to benefit from the simplified workflow, and reduced need for hyperemic agents.