Figure 1

Pulse sequence diagram and sampling pattern for 3D myocardial perfusion imaging. The pulse sequence consists of a 90° BIR-4 adiabatic RF pulse for myocardial saturation, followed by a saturation recovery time and undersampled 3DFT GRE readout. 3D k-space was undersampled by factor of three and two in ky and in kz, respectively, resulting in a net undersampling factor of six. The k-space sampling locations were shifted in a cyclic pattern such that coil sensitivity map could be obtained from the data in six neighboring R-R intervals. SENSE reconstruction of undersampled data from the k^thcardiac cycle utilized coil sensitivity maps derived from the (k-2)^thto (k+3)^thcardiac cycles.