Patent ID: 8886285

Claim:
A control unit for a medical examination apparatus, comprising: an imaging modality for acquiring image data of a patient; a controllable injection device for injecting a regulatory substance into the patient to reach a proposed stress sate of the patient in order to acquire the image data of the patient; and a measurement device for measuring a control variable of the patient that is influenced by the regulatory substance, wherein the control unit is configured to: set a limit value of the control variable, set a start value of an injection rate of the injection device for injection the regulatory substance into the patient based on body weight of the patient, subsequently increase the injection rate of the injection device at a predefined rate until the proposed stress state of the patient is reached incrementally during the data acquisition, and adjust the injection rate of the injection device based on the control variable of the patient to safely reach the proposed stress state of the patient during the data acquisition, and trigger an alarm if the control variable exceeds the limit value.