Perfusion computed tomography in renal cell carcinoma

Figure 4 Perfusion parameters vs size evaluation in depicting partial response. Comparison of perfusion parameters in a case of left side clear cell renal cell carcinoma after start of anti-angiogenic therapy. Follow-up scan at 6 mo interval (B) showed at 6 mo interval shows decrease in permeability as compared to baseline scan (A) suggestive of partial response. However, no change in size of lesion noted between baseline (C) and follow-up (D) scans which would have been labelled as stable disease. MIP: Maximum peak intensity; TTP: Time to peak; BF: Blood flow; BV: Blood volume; MTT: Mean transit time; PMB: Permeanbility; CT: Computed tomography.