| http://www.w3.org/ns/prov#value | - urgery effects showed almost normal levels of Cho and a Cho/Cr ratio < 2.0, regions with radionecrosis were characterized by increased lipid levels and a Cho/Cr ratio > 2.0 in conjunction with decreased absolute levels of all metabolites, especially of Cr and NAA. CONCLUSIONS: MRS is an increasingly valuable tool for the differential diagnosis of radiation reactions.
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