Magnetic resonance imaging (MRI) shows high contrast and resolution on the soft tissues and nervous tissues
without radiation hazard, which is used as an essential diagnostic test in the radiology. Cross excitation means
to show artifacts upon the signal loss from overlapped radio frequency (RF) in some anatomical locations
during the image acquisition process with RF pulse. To lower cross excitation artifacts, their images were
analyzed by the changes of flip angle, TR, and TE. Ingenia 3.0T CX MRI by Philips was used for image
acquisition. Self-developed water phantom used for quality control of MRI was used. SNR values at 40 degree
of flip angle were 1,354 ±7.12 and 214 ± 2.10; those at 70 degree were 1,375 ± 7.31 and 305 ± 2.12; and those at
90 degree were 1,413 ± 7.93 and 357 ± 2.33, for water and artifact, respectively. CNR values were 1,140 ± 7.01,
1,070 ± 7.18, and 1,056 ± 7.12 at 40, 70 and 90 degree of flip angle, respectively (P < 0.05). As f lip angle was
lowered more, artifact was decreased more. In case of 90 degree of flip angle, artifact was decreased more as
TR was longer. These results are anticipated to be used as the fundamental data to acquire more valued
medical images in terms of diagnostics with MRI to diagnose various diseases.