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AJNR - American Journal of Neuroradiology

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American Journal of Neuroradiology 26:1170-1173, May 2005
© 2005 American Society of Neuroradiology

Technical Note
BRAIN

MR Ventriculocisternography By Using 3D Balanced Steady-State Free Precession Imaging: Technical Note

Ming-Long Wu^a, Cheng-Wen Ko^e, Ting-Yi Chen^b, Ming-Ting Wu^f, Hsiao-Wen Chung^c, Teng-Yi Huang^d and Yi-Ru Lin^a

^a Department of Electrical Engineering, National Taiwan University, Taipei, Taiwan, Republic of China
^b Department of Radiology, Veterans General Hospital-Taipei, Taipei, Taiwan, Republic of China
^c Department of Radiology, Tri-Service General Hospital, Taipei, Taiwan, Republic of China
^d Department of Electrical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan, Republic of China
^e Department of Computer Science and Engineering, National Sun Yat-sen University, Kaohsiung, Taiwan, Republic of China
^f Department of Radiology, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan, Republic of China

Address correspondence to Cheng-Wen Ko, PhD, Department of Computer Science and Engineering, National Sun Yat-sen University, No.70, Lien-Hai Road, Kaohsiung, 80424, Taiwan, Republic of China

Summary: This study investigated the effects of flip angle setting in 3D balanced steady-state free precession (SSFP) imaging on CSF-parenchyma contrast and section aliasing artifacts. Theoretical derivations indicated that the extent of section aliasing artifacts decreased as the flip angle was lowered, at the expense of a sacrifice in CSF-parenchyma contrast. Experimental data agreed closely with theoretical predictions. A flip angle of about 40° is therefore recommended for 3D balanced SSFP MR ventriculocisternography.