Objective:To evaluate zero-filled interpolation (ZIP) technique for improving the accuracy of vessel diameter measurement in contrast-enhanced MRA(CE-MRA) by comparing zero-filled high-spatial-resolution CE-MRA with conventional CE-MRA in anatomical phantoms.Methods:Phantoms of arteries were made with different lumen diameter.A head coil was utilized.The parameters of fast spoiled gradient recalled (FSPGR) pulse sequence were: flip angle 30°,TR 6ms, TE 1.4ms, bandwidth 31.25kHz, slice thickness 1.2mm, matri...