1. Apparatus for monitoring a human body in which a fluid flows and which is characterized by a change in the system with time in space for determining a prostate condition for diagnosing cancer comprising: (a) monitoring means for monitoring a preselected place in a human body for collecting data indicative of a parameter of the prostate that varies with time as a function of at least one variable related to wash-in and wash-out behavior; (b) first data processing means responsive to the monitoring means for receiving the collected data and processing same; (c) selecting means for controlling the monitoring means for setting parameters of data collection, and for receiving inputs of body parameters including said prostate parameter and a plurality of time points correlated to a body event; (d) second data processing means including: (1) grid means for dividing the space defined by the at least two variables, each ranging from a minimum to a maximum, into a grid; (2) first determining means for determining for each grid location a calculated value and intensity function indicative of the wash-in of the parameter being monitored for each time point; (3) first normalizing means for determining a grid location of maximum intensity and normalizing all grid locations with reference to the maximum; (4) first colorizing means for coloring all grid locations one of a plurality of colors based on a color function indicative of wash-out behavior; (5) arranging means for arranging all grid locations for all time points into a composite to develop a calibration map of the grid with each grid location correlated to a color hue/color intensity; (6) analyzing means for analyzing the calibration map to determine if the attributes of the calibration map meet a preselected standard and, if not, to implement the plurality of time points or a body parameter and iterate until the resultant calibration map meets said standard; (e) said first data processing means receiving as further inputs the plurality of time points and the maximum of the intensity function as determined in the second data processing means and further including: (1) division means for spatially dividing the preselected place in the system into spatial units; (2) second determining means for determining for each spatial unit a value and intensity function indicative of wash-in behavior based on the collected data for each time point; (3) second normalizing means for normalizing the intensity of each spatial unit based on maximum intensity obtained from the first normalizing means; (4) second colorizing means for coloring all spatial units one of a plurality of colors based on the color function indicative of wash-out behavior of said first colorizing means; (5) arranging means for arranging all spatial units for all time points into a composite of the preselected space with each spatial unit correlated to a color hue/color intensity.