RESUMO
Objective To observe the changes of image quality after adjusting the space location and the scan parameters of MRS.Methods 65 patients were scanned with magnetism resonance spectrum head examination.The location,size and other scan parameters of the region interested were changed intentionally.The quality of the images was preliminarily evaluated and the relationship between the parameters and the quality of MRS were probed.Results In the 65 cases,60 were with better shape of wave lines and metabolite peak positions,5 with aberrant lines and shifted peaks.Among the recorded data: the range of half high width value is 5~23,water suppression level 92~99.With the 60-case group,all those half high width values were within the given range of the system,on the contrast,within the 5-case group half high width values were 7,9,16 and 23,and water suppression levels were 95,96,97.Conclusion High-quality wave spectrum depends on high uniformity of magnetic field.The value of half high width is an important factor that reflects the uniformity of magnetic field.
