Methods and systems for calibrating radiological data associated with a tissue in a subject are provide. Various embodiments described herein analyze a radiological image of the tissue to calculate a raw value indicative of a biological parameter such as metabolic activity in the tissue, and analyze a microscopy image of the tissue to identify a distribution of cells of interest within the tissue. A calibrated value indicative of a biological parameter (e.g. metabolic activity) of cells of interest within the tissue is then calculated, by correcting the raw value based on the identified distribution of cells of interest within the tissue.
