View-ordering in radial fast spin-echo imaging.
Radial MRI sequences are frequently used to obtain images with reduced sensitivity to motion. To decrease imaging time, multiple spin-echo acquisitions can be incorporated into radial sequences. In this case, different radial lines of Fourier data have different TE times and the resulting images can contain streaking artifacts due to T(2) decay. The streaking is not only dependent on the T(2) of the object and the timing of the data acquisition, but also on the order in which radial lines are collected (view order). The view ordering can easily be controlled to minimize artifacts due to T(2) decay as well as motion. Four view-ordering techniques are presented and evaluated for the radial FSE sequence.
Theilmann
Rebecca J
RJ
Department of Radiology, University of Arizona, Tucson, Arizona 85724-5084, USA.
Gmitro
Arthur F
AF
Altbach
Maria I
MI
Trouard
Theodore P
TP
D000005:Abdomen / Q000033:anatomy & histology; D000362:Agar; D016477:Artifacts; D001921:Brain / Q000033:anatomy & histology; D019327:Copper Sulfate; D005583:Fourier Analysis; D006801:Humans; D007089:Image Enhancement / Q000379:methods*; D007091:Image Processing, Computer-Assisted / Q000379:methods; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008954:Models, Biological; D009038:Motion; D019047:Phantoms, Imaging; D013997:Time Factors
D000362:Agar; D019327:Copper Sulfate