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題 名 | Proton Magnetic Resonance Spectroscopy of Cerebral Glioma after Irradiation=腦神經膠質瘤在放射治療後的質子磁振光譜 |
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作 者 | 吳樹鏗; 高發常; 陳文政; 鄧樂明; 張承能; 衛優遊; 萬永亮; | 書刊名 | 長庚醫學 |
卷 期 | 24:11 2001.11[民90.11] |
頁 次 | 頁708-716 |
分類號 | 416.36 |
關鍵詞 | 質子磁振光譜; 神經膠質瘤; 放射治療; Proton MR spectroscopy; Glioma; Irradiation; |
語 文 | 英文(English) |
中文摘要 | 背景:磁振造影常用來追?經放射治療後之腦神經膠質瘤,但不易區分腫瘤再生及照射後變化。在此研究中,我們以質子磁振光譜來評估腦神經膠質瘤在接受放射治療後之新陳代謝物的訊息。 方法:在這三年期之計畫中,當磁振造影發現病人腦內有不正常質塊,我們便馬上施行質子磁振光譜檢查,最後我們納入58位病人共122次質子磁振光譜作分析研究。光譜之判讀以NAA及Cho跟Cr之相對值為基準。 結果:本究結果顯示,腫瘤再生之病人之Cho較高,其Cho/Cr比率範圍從0.9至9.5(平均:3.0)而病情穩定沒有腫瘤再生之病人,其Cho/Cr比率較低,範圍從0.4至2.1(平均1.2)。另外,在系列磁振光譜檢查中,腫瘤再生病人之Cho/Cr比率有明顯遞增,範圍從41至87%(平均:63%)而病情穩定之病人其Cho/Cr比率之遞增都少於32%。NAA/Cr比率之下降幅度及Lactate之發生率在兩組病人都差不多。在病人對側腦部之質子磁振光譜中,我們並沒有發現異常變化。 結論:磁振光譜可提供腦神經膠質瘤經放射線治療後之代謝變化,及可排除對側腦神經組織有否放射線傷害。Cho為值得信賴的腫瘤再生之指標,我們認為高Cho/Cr比率或在系列磁振光譜檢查之Cho/Cr比率有明顯遞增時,腫瘤再生之可能性則相當高,可是如Cho/Cr比率較低時,對診斷有否腫瘤再生則沒法確定。 |
英文摘要 | Background: Conventional magnetic resonance imaging (MRI) is commonly employed to assess cerebral gliomas after radiotherapy, but it cannot always differentiate tumor regrowth from post-irradiation changes. In this study, we utilized magnetic resonance spectroscopy (MRS) to evaluate changes in cerebral metabolites in patients with a cerebral glioma after irradiation. Methods: Over a period of 3 years, we performed MRS after MRI whenever soft tissue masses were found on magnetic resonance (MR) images. A total of 122 MR spectra of 58 patients was used for analysis. Spectral interpretations were based on integral values of the N-acetylaspartate (NAA) and choline (Cho) compounds relative to phosphocreatine/creatine (Cr). Results: Our MRS study showed that higher Cho/Cr ratios occurred in regrowing gliomas than for stable diseases (range, 0.9 to 9.5 vs. 0.4 to 2.1; mean, 3.0 vs. 1.2). A greater increment in the Cho/Cr ratio between successive studies was also noted in regrowing gliomas than for stable disease (range, 41% to 87% vs. <32%). No significant differences in NAA/Cr ratios or lactate were found between these 2 groups. None of our patients exhibited abnormal MR spectra in the mirror area of the contralateral brain. Conclusion: MRS provides valuable information about the metabolism of irradiated gliomas and can be used to exclude radiation encephalopathy of the contralateral brain. Cho is the most reliable indicator of a regrowing glioma. A high Cho/Cr ratio or substantial elevation in the Cho/Cr ratio between serial studies increases the likelihood of tumor regrowth. However, lower Cho/Cr ratios were inconclusive for determining if tumor regrowth or a stable process was occurring. |
本系統中英文摘要資訊取自各篇刊載內容。