为了研究磁共振引导放射治疗对剂量分布的影响,采用蒙特卡罗方法研究了横向均匀磁场对6 MV光子束在4种不同人体组织材料与空气界面处因电子回转效应导致剂量分布的改变.模拟显示,对于电离能相近的几种材料,磁场对剂量分布扰动的差别较小,而且电离能较大的材料,这种扰动明显变小.结果表明,磁场的引入会影响光子束原有的剂量分布,且这种影响与材料的电离能有关.这意味着虽然磁共振引导放射治疗可以增强靶向精度,提高治疗效果,但磁场会导致光子束剂量分布的改变,且不同的组织这种改变也不相同,这将为相应的剂量算法研究带来了新的挑战.
参考文献
[1] | OBORN B M;METCALFE P E;BUTSON M J.[J].Medical Physics,200936(08):3549. |
[2] | JAFFRAY D A;SIEWERDSEN J H;WONG J W.[J].International Journal of Radiation Oncology Biology Physics,200253(05):1337. |
[3] | NEDERVEEN A J;DEHNAD H H;UULKE A M.[J].Radiotherapy and Oncology,200368(01):81. |
[4] | NEDERVEEN A J;DEHNAD H H;UULKE A M.[J].Radiotherapy and Oncology,200886(01):25. |
[5] | KRON T;EYLES D;JOHN S L;BATTISTA J.[J].Medical Physics,200631(04):242. |
[6] | FALLONE B G;MURRAY B;RATHEE S.[J].Medical Physics,200936(06):2084. |
[7] | RAAIJMAKERS A J;RAAYMAKERS B W;LAGENDIJK J J.[J].Physics in Medicine and Miology,200853(04):909. |
[8] | YANG Y;BEDNARZ B.[J].Physics in Medicine and Miology,201358(04):N47. |
[9] | LAMEY M;BURKE B;BLOSSER E.[J].Physics in Medicine and Biology,201055(04):995. |
[10] | BURKE B;GHILA A;FALLONE B G.[J].Medical Physics,201239(08):5004-5014. |
[11] | BIELAJEW A F.[J].Medical Physics,199320(04):1171. |
[12] | JETTED.[J].Medical Physics,200027(08):1705. |
[13] | JETTED.[J].Medical Physics,200027(12):2726. |
[14] | RAAYMAKERS B W W;RAAIJMAKERS A J;KOTTE A N T J.[J].Physics in Medicine and Biology,200449(17):4109. |
[15] | RAAIJMAKERS A J;RAAYMAKERS B W;LAGENDIJK J J.[J].Physics in Medicine and Biology,200853(04):909. |
[16] | RAAIJMAKERS A J;RAAYMAKERS B W;LAGENDIJK J J.[J].Physics in Medicine and Biology,200550(07):1363. |
[17] | KIRKBY C;STANESCU T;RATHEE S.[J].Medical Physics,200835(03):1019. |
[18] | RAAIJMAKERS A J;HARDEMARK B;RAAYMAKERS B W.[J].Physics in Medicine and Biology,200752(23):7045. |
[19] | RAAIJMAKERS A J;RAAYMAKERS B W;LAGENDIJK J J.[J].Physics in Medicine and Biology,200752(14):4283. |
[20] | KOSUNEN A;ROGERS D.[J].Medical Physics,199320(04):1181. |
[21] | LI X A;REIFFEL L;CHU J.[J].Medical Physics,200128(02):127. |
[22] | NETTELBECK H;TAKACS G J;ROSENFELD A B.[J].Physics in Medicine and Biology,200853(18):5123. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%