Objective: This paper expands on the basis of previous research confirming through empirical evidence both meaning and nature of the classic-curvature and the intensity-curvature functional images. Methods: Eleven subjects affected by human brain tumors were scanned using Magnetic Resonance Imaging (MRI). Twodimensional MRI images were selected to study the subjects using the intensity-curvature measurement approaches called: classic-curvature and intensity-curvature functional. The bivariate

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... bic polynomial and the bivariate linear function were fitted to the MRI images in order to compute the classic-curvature and the intensity-curvature functional respectively. Results: This work shows one novelty related to the use of the two intensity-curvature measurement approaches when furthering the study of tumors detected with MRI. The novelty is the highlight of the accumulation of the contrast agent through the visually perceptible third dimension perpendicular to the imaging plane. Conclusions: The meaning and the nature of the aforementioned intensity-curvature measurement approaches is suggested to be the high pass filtered MRI signal.