title: Magnetic resonance spectroscopic imaging of brain injury after nasopharyngeal cancer radiation in early delayed reaction.
abstract: This study aimed to investigate the value of magnetic resonance spectroscopy (MRS) imaging in assessing nasopharyngeal carcinoma radiotherapy during the early delayed reaction period. Eighty cases of nasopharyngeal cancer treated with radiotherapy within the same period underwent MRS imaging before or after radiotherapy. Of the 80 cases, 47 underwent MRS imaging on the 3rd, 4th, 6th, and 12th months after radiotherapy. The trends of the primary metabolite concentration at different time points were monitored and compared with the corresponding data after radiotherapy. Repeated measures analysis of variance was performed. At the end of radiotherapy, the N-acetyl aspartate (NAA)/creatine (Cr), choline (Cho)/Cr, and NAA/Cho ratios were reduced to the lowest levels after 3 months. However, increasing trends were observed from the 4th to the 12th month. On the 12th month, stable levels were reached with statistically significant differences (F = 316.02, 53.84, 286.68; P < 0.01). MRS reflected the radiation injury-repair process in the brain of a nasopharyngeal cancer patient during early delayed reaction. This non-invasive monitoring of changes in brain tissue metabolite concentrations provides valuable information for prognosis.
authors.affiliation: Department of Radiology, People's Hospital of Hainan Province, Haikou, China.
authors.forename: W-S
authors.initials: WS
authors.lastname: Chen
authors.affiliation: Department of Radiology, People's Hospital of Hainan Province, Haikou, China jianjunlicn@yeah.net.
authors.forename: J-J
authors.initials: JJ
authors.lastname: Li
authors.affiliation: Department of Radiology, People's Hospital of Hainan Province, Haikou, China.
authors.forename: J-H
authors.initials: JH
authors.lastname: Zhang
authors.affiliation: Department of Radiology, People's Hospital of Hainan Province, Haikou, China.
authors.forename: L
authors.initials: L
authors.lastname: Hong
authors.affiliation: Department of Radiology, People's Hospital of Hainan Province, Haikou, China.
authors.forename: Z-B
authors.initials: ZB
authors.lastname: Xing
authors.affiliation: Department of Radiology, People's Hospital of Hainan Province, Haikou, China.
authors.forename: F
authors.initials: F
authors.lastname: Wang
authors.affiliation: Department of Radiology, People's Hospital of Hainan Province, Haikou, China.
authors.forename: C-Q
authors.initials: CQ
authors.lastname: Li
mesh_terms: D000328:Adult; D001224:Aspartic Acid / Q000031:analogs & derivatives / Q000378:metabolism; D001930:Brain Injuries / Q000175:diagnosis* / Q000209:etiology / Q000378:metabolism; D002794:Choline / Q000378:metabolism; D003401:Creatine / Q000378:metabolism; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D008297:Male; D008875:Middle Aged; D009303:Nasopharyngeal Neoplasms / Q000532:radiotherapy*; D011379:Prognosis; D011832:Radiation Injuries / Q000175:diagnosis* / Q000209:etiology / Q000378:metabolism; D011878:Radiotherapy / Q000009:adverse effects / Q000379:methods; D013997:Time Factors
chemical_list: D001224:Aspartic Acid; C000179:N-acetylaspartate; D003401:Creatine; D002794:Choline