Improvement of spiral MRI with the measured k-space trajectory.
The k-space trajectory of a spiral imaging sequence was measured with a self-encoding technique. The image quality improved dramatically when reconstructed with the measured k-space trajectory. There were substantial artifacts in images reconstructed with the derived k-space trajectory under the assumption of gradient system linearity. The results indicated the non-linearity of the gradient system and the effectiveness of the correction technique.
Ding
X
X
Department of Diagnostic Radiology, Cleveland Clinic Foundation, OH 44195-5129, USA.
Tkach
J
J
Ruggieri
P
P
Perl
J
J
Masaryk
T
T
D000703:Analog-Digital Conversion; D007089:Image Enhancement / Q000379:methods*; D008279:Magnetic Resonance Imaging / Q000295:instrumentation / Q000379:methods*; D008962:Models, Theoretical; D019047:Phantoms, Imaging; D012680:Sensitivity and Specificity