Clinicians working in oncology face many challenges: lesion characterization, visualization and delineation of tumors and assessment of treatment response. Requiring patients to undergo the wide range of exams needed to acquire most of this information is time-consuming and expensive and may adversely affect patient well-being. The Philips IQon Spectral CT circumvents many of these drawbacks – the spectral information is acquired in just one exam, at no extra dose, and can be used completely retrospectively.