VMAT和IMRT技術(shù)在鼻咽癌放療海馬保護(hù)中可行性研究
發(fā)布時間:2018-06-23 來源: 短文摘抄 點(diǎn)擊:
[摘要] 目的 研究靜態(tài)調(diào)強(qiáng)技術(shù)和容積旋轉(zhuǎn)調(diào)強(qiáng)治療技術(shù)在治療鼻咽癌時對海馬區(qū)的物理劑量學(xué)的差異性。 方法 對2016年5~11月入院的10例鼻咽癌患者采用:①容積旋轉(zhuǎn)調(diào)強(qiáng)治療技術(shù)V-MAT-HF(對海馬區(qū)有劑量限制);②容積旋轉(zhuǎn)調(diào)強(qiáng)治療技術(shù)V-MAT(對海馬區(qū)不作劑量限制);③9野靜態(tài)調(diào)強(qiáng)計劃9B-IMRT-HF(對海馬區(qū)有劑量限制);④9野靜態(tài)調(diào)強(qiáng)計劃9B-IMRT(對海馬區(qū)不作劑量限制),記錄各患者靶區(qū)適形性CI、劑量均勻性HI腦海馬區(qū)HF的放射劑量,統(tǒng)計劑量學(xué)差異。 結(jié)果 鼻咽癌患者靶區(qū)容積旋轉(zhuǎn)調(diào)強(qiáng)技術(shù)(保護(hù)腦海馬區(qū))對腦海馬區(qū)的劑量低于其他三種治療技術(shù),其差異有統(tǒng)計學(xué)意義(P<0.05);行保護(hù)性照射的容積調(diào)強(qiáng)技術(shù)對腦海馬區(qū)HF受照劑量遠(yuǎn)遠(yuǎn)低于其他三種治療技術(shù),差異有統(tǒng)計學(xué)意義(P<0.05)。 結(jié)論 10例鼻咽癌患者靶區(qū)容積旋轉(zhuǎn)調(diào)強(qiáng)技術(shù)(保護(hù)腦海馬區(qū))對腦海馬區(qū)的劑量明顯低于其他三種治療技術(shù),VMAT保護(hù)海馬區(qū)技術(shù)可以認(rèn)為是鼻咽癌患者放射治療的首選治療技術(shù)。
[關(guān)鍵字] 鼻咽癌;常規(guī)9野靜態(tài)調(diào)強(qiáng)治療;容積旋轉(zhuǎn)調(diào)強(qiáng)治療;腦海馬區(qū)放射劑量
[中圖分類號] R730.5 [文獻(xiàn)標(biāo)識碼] B [文章編號] 1673-9701(2018)08-0079-03
Radiate dosimetry of volumetric modulated therapy on hippocampus in nasopharyngeal carcinoma
XIONG Chao YE Wei WANG Lu GONG Minyong
Cancer Center, Jiujiang First People"s Hospital, Jiujiang inJiangxi Province, Jiujiang 333200,China
[Abstract] Objective To study the differences of physical dosimetry and biological indicators of hippocampus in the treatment of nasopharyngeal carcinoma by different volumetric modulated arc therapies (V-MAT). Methods ①V-MAT-HF (dose-limiting for hippocampus), ②V-MAT (no dose-limiting for hippocampus), ③ 9-field intensity modulated radiation therapy-HF(9B-IMRT-HF) (dose-limiting for hippocampus) and ④9B-IMRT (no dose limitation for hippocampus) were used in 10 cases of nasopharyngeal carcinoma admitted from May 2016 to November 2016 in our hospital. Conformal index(CI), Homogeneity index (HI) and radiation dose of HF in brainstem, spinal cord and hippocampus were recorded. Results The doses of V-MAT-HF(dose-limiting for hippocampus) to the hippocampus in patients with nasopharyngeal carcinoma were significantly lower than those of the other three therapeutic techniques(P<0.05); HF dose to hippocampus of V-MAT with protective radiation was much lower than the other three techniques(P<0.05). Conclusion The dose of V-MAT (protecting the hippocampus) of 10 patients with nasopharyngeal carcinoma is significantly lower than that of the other three therapeutic techniques. V-MAT which protects hippocampus can be considered as the preferred treatment of radiation therapy for patients with nasopharyngeal carcinoma.
[Key words] Nasopharyngeal carcinoma; Conventional 9-field intensity modulated radiation therapy; Volumetric modulated arc therapy; Radiation dose of hippocampus
放射治療是鼻咽癌綜合治療中重要的治療方法,研究證實(shí)部分鼻咽癌患者接受放療一段時間后出現(xiàn)言語能力下降、記憶力受損、神經(jīng)認(rèn)知功能下降等生活質(zhì)量降低的表現(xiàn)[1-2],而越來越多的研究顯示海馬區(qū)損傷是神經(jīng)認(rèn)知功能障礙的主要原因。目前鼻咽癌放射治療多采用9野調(diào)強(qiáng)技術(shù)和容積旋轉(zhuǎn)調(diào)強(qiáng)技術(shù),在治療患者的同時是否能有效降低腦海馬區(qū)放射劑量、減少放療損傷卻少有文獻(xiàn)報道[3]。本研究分別采用VAMT和IMRT設(shè)計保護(hù)或不保護(hù)海馬的兩種計劃,研究鼻咽癌放療時海馬保護(hù)的可行性,現(xiàn)報道如下。
相關(guān)熱詞搜索:鼻咽癌 放療 可行性研究 保護(hù) 技術(shù)
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