小細(xì)胞肺癌保護(hù)海馬回區(qū)腦預(yù)防照射的探索性臨床研究
發(fā)布時間:2019-06-20 16:24
【摘要】:[目的]比較三種放療技術(shù)保護(hù)海馬回區(qū)的劑量學(xué)與毒副反應(yīng)的相關(guān)性研究。[方法]從2014年4月至2015年3月,9例局限期小細(xì)胞肺癌患者入組。腦部核磁共振檢查排除腦轉(zhuǎn)移,應(yīng)用Tomotherapy、IMRT 及 VMAT技術(shù),對海馬回區(qū)進(jìn)行保護(hù)照射,放療的處方劑量為95%PTV 25Gy/2.5Gy/10Fx。初步分析劑量分布,治療計劃優(yōu)劣。根據(jù)CTC AE4.0, MMSE量表評價毒副反應(yīng)及認(rèn)知功能,并分析腦轉(zhuǎn)移率。[結(jié)果]9例患者均應(yīng)用Tomotherapy、IMRT、VMAT進(jìn)行計劃比較和劑量學(xué)研究。Tomotherapy計劃可將海馬回的平均劑量降至5.76Gy,外擴(kuò)減量區(qū)平均劑量降至6.68Gy,較處方劑量分別降低77%和73%,海馬回最大劑量7.14Gy,平均處方劑量覆蓋為94.56%。IMRT 16.99Gy、18.26Gy,較處方劑量分別降低32%和27%。VMAT計劃的海馬回及外擴(kuò)區(qū)平均劑量分別為17.81Gy、19.05Gy,較處方劑量分別降低29%和24%。9例患者中1例死亡,2例出現(xiàn)多發(fā)腦轉(zhuǎn)移,未出現(xiàn)海馬回區(qū)的轉(zhuǎn)移。主要的毒副作用為輕度頭疼、頭暈。復(fù)診MMSE(簡易智能狀態(tài)評價,滿分30分,大于24為正常)平均得分29.3分,療后6月復(fù)查記憶力平均得分5.86分(滿分6分),較療前無明顯差異。MMSE評分未見明顯下降,認(rèn)知及記憶功能無明顯受損。[結(jié)論]Tomotherapy技術(shù)保護(hù)海馬回區(qū)的腦預(yù)防照射具有明顯的劑量學(xué)優(yōu)勢,無明顯毒副作用,患者療后6個月未出現(xiàn)明顯認(rèn)知功能障礙。
[Abstract]:Objective to compare the relationship between dosimetry and side effects of three radiotherapy techniques in protecting hippocampal gyrus. [methods] from April 2014 to March 2015, 9 patients with localized small cell lung cancer were enrolled in the group. Brain magnetic resonance imaging (MRI) excluded brain metastasis. Tomotherapy,IMRT and VMAT techniques were used to protect hippocampal gyri. The prescription dose of radiotherapy was 95%PTV 25GY 鈮,
本文編號:2503363
[Abstract]:Objective to compare the relationship between dosimetry and side effects of three radiotherapy techniques in protecting hippocampal gyrus. [methods] from April 2014 to March 2015, 9 patients with localized small cell lung cancer were enrolled in the group. Brain magnetic resonance imaging (MRI) excluded brain metastasis. Tomotherapy,IMRT and VMAT techniques were used to protect hippocampal gyri. The prescription dose of radiotherapy was 95%PTV 25GY 鈮,
本文編號:2503363
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