For 1 H-MRS exam, NAA/Cr ratio is a rather sensitive index for early detecting DBI and for correctly assessing the prognosis.

• DBI1H MRS各项指标中 ,NAA/Cr较敏感。 通过观测NAA/Cr的变化 ,可早期诊断DBI,且对病情的发展作出准确的估测