[Evaluation of the Effect of Adiabatic Pulse and B1 Shim to the Radio Frequency Homogeneity in Chemical Shift Imaging].

It is considered that the enhancement of chemical shift and the elevation of signal-to-noise ratio (SNR) induced by high magnetic fields are useful for the evaluation of metabolism using magnetic resonance spectroscopy (MRS). However, the reduction of the localization in MRS seems to be caused by the decreased homogeneity of radio frequency (RF) pulses, especially in chemical shift imaging (CSI). To search the influence of B1 shim mode and the significance of adiabatic pulses, we have examined the changes of RF homogeneity using 3 T magnetic resonance imaging (MRI) with the water phantom and the metabolites phantom (containing acetate and lactate) in CSI.

[Examination of the orbitomeatal basal line-anthropological basal line crossing angle and acanthiomeatal line-anthropological basal line crossing angle].

Orbitomeatal basal line-anthropological basal line (OML-ABL), and the acanthiomeatal line (AML)-ABL crossing angles were measured using profile pictures. There were 219 volunteers in total: 42 people four years old, 44 people nine years old, 45 people 14 years old, 43 people 19 years old, and 45 people 40 years or older (48±7.4 years).