Erkennung von Kopfbewegungen während Emissionstomographischer Datenaufnahmen

One assumption in emission tomograpy is the stability of activity distribution during acquisition. Thus, to detect movement of the patient, acquisition was splitted into two time segments. By calculating and comparing the centers of mass of the projections, evaluation of movement may be performed by means of two movement indicators: integral and total movement index. Depending on the movement of a phantom, iBI had values from 2.6 to 6 and the tBI values from 100 to 300. For Patients we obtained values of the iBI from 2.7 to 16 and of the tBI from 100 to 5000.