1. A method for generating medical image data records of an examination object, comprising: operating a magnetic resonance scanner, while an examination object is situated in the magnetic resonance scanner, to acquire raw magnetic resonance data from the examination object; providing a computer with a reconstruction algorithm designed to reconstruct a medical image data record from the raw magnetic resonance data and a virtual value of a physiological parameter that has not been obtained from the examination object, said virtual value being selected from the group consisting of blood pressure, cardiac rate, oxygen saturation, temperature, and a hematocrit value; providing said raw magnetic resonance data acquired from the examination object to said computer and, in said computer, generating at least two medical image data records by applying said reconstruction algorithm at least twice to the raw magnetic resonance data and using a different virtual value of said physiological parameter respectively in said at least two applications of said reconstruction algorithm so as to generate said at least two medical image data records; and making said at least two medical image data records available in electronic form at an output of said computer.