DENTSPLY SIRONA Inc.
Method for generating a radial or spiral MRT image

Abstract:

Disclosed herein is a method for generating an MRI image in which a radial or spiral k-chamber path with a constant angular increment Psi is used to take an MRI image, the angular increment Psi being in the angular range of between 5-55 degrees or being in the corresponding supplementary angle Psi' and is selected according to the formula Psi.sub.N,M=pi/(N+1/(M+tau-1)). Alternatively, for an angular increment Psi which deviates from the angle increment of the optimal distribution of n radial profiles Psi.sub.opt=180.degree./n, the minimum scanning efficiency of the angular increment Psi for n>21 profiles is greater than 0.95, the angular increment Psi is in an angular range of 5.degree. to less than 68.7537.degree., in particular between 5-55 degrees or in the corresponding supplementary angle Psi'. Compared to the arrangement of the radial or spiral profile using the golden angle of 111.24.degree., the angle increments calculated according to the above formula lead to lower eddy current artifacts, for example during the use of a b-SSFP-pulse sequence.