Abstract:
An image system, notably an X-ray system and an ultrasound system, is provided in which images or sequences of images are generated and used to automatically change or optimize the operational behavior of individual image system components. Measurement fields are defined in the images of an image sequence by means of a data processing unit. Information is extracted from the measurement fields in order to adapt the system components. More specifically, in the course of a sequence of images the measurement fields are adapted or shifted in conformity with the motion of objects.
Abstract:
The invention relates to device and a method for determining the concentration of a PET tracer in the blood of a patient (1). With the aid of an X-ray CT (5, 6), first of all the spatial position (r) of a volume element (2) that is filled with blood is determined, which for example can be a part of the aorta or of the left ventricle of the heart. Subsequently, a TOF PET unit that comprises two detector elements (3a, 3b) is set in such a way that it establishes the concentration of the tracer in this volume element (2) and thus in the blood. This value can for example be used within the framework of pharmaco-kinetic examinations which are carried out on the patient (1) with the aid of a three-dimensional PET unit (4).