Evaluation of quantitative contrast harmonic imaging to assess malignancy of liver tumors: A prospective controlled two-center study

Figure 1 Gray value progression of the five ROIs over 10 s. A: For a patient with liver metastasis in the arterial phase; B: For the same patient in the portal-venous phase; C: For the same patient in the late venous phase. (red, gray-value progression in the tumor; green, gray-value progression in the surrounding healthy tissue).