澶撮閮ㄨ偪鐦よ皟寮烘斁鐤椾腑鎽嗕綅鍋忓樊鐨勩�愯鏂囬泦銆戞祴閲?/p>
涓庡垎鏋?/p>
銆愬叧閿瘝銆?/p>
澶撮閮ㄨ偪鐦わ紱鎽嗕綅璇樊锛涚數瀛愬皠閲庡奖鍍忚缃紱鏁板瓧閲嶅缓鍥惧儚
銆?/p>
Abstract
銆?/p>
AIM: To measure the setup error in the intensity
modulated radiation therapy (IMRT) for headneck neoplasms, and to
analyze the margin between the clinical target volume (CTV) and
planning target volume (PTV). METHODS: Seventysix patients with
headneck neoplasms
were choosed at random.
The portal films were
screened using the electronic portal imaging device (EPID), and the
error was analyzed through comparing the portal film with the
digitally reconstruced radiographs (DRR) in the treatment planning
system (TPS). RESULTS: The setup errors were (-
0.62卤1.46) mm,(
-
0.41卤1.54) mm,(
-
0.31卤1.67) mm and the margins were 2.27 mm, 1.87 mm,
1.98 mm in lateral, cranialcaudal and ventraldorsal directions
respectively. CONCLUSION: For the patients with headneck neoplasms
undergoing the IMRT, the margins between the CTV and the PTV should
be 2.5 mm in the lateral direction, and 2 mm in cranialcaudal and
ventraldorsal directions. Moreover, with the treatment time goes by,
the error varied irregularly.
銆?/p>
Keywords
銆?/p>
head and neck neoplasms; setup error; electronic
portal imaging device (EPID); digital reconstructedly radiograph (DRR)
銆愭憳瑕併�戠洰鐨勶細
娴嬪畾澶撮閮ㄨ偪鐦ゅ湪璋冨己鏀惧皠娌荤枟涓殑鎽嗕綅鍋忓樊锛屽垎鏋?/p>
璁″垝璁捐涓粠涓村簥闈跺尯锛?/p>
CTV
锛夊埌璁″垝闈跺尯锛?/p>
PTV
锛夌殑澶栨墿杈圭晫
.
鏂规硶锛?/p>
闅忔満鎶?/p>
鍙?/p>
76
鍚嶅ご棰堥儴鑲跨槫鎮ｈ�咃紝鍦ㄦ不鐤楁椂鐢ㄧ數瀛愬皠閲庡奖鍍忚缃紙
EPID
锛夋媿鎽勫皠閲庣墖锛?/p>
灏嗗皠閲庣墖鍜岃鍒掔郴缁熶腑鐨勬暟瀛楅噸寤哄皠閲庯紙
DRR
锛夊浘鍍忕墖杩涜璇樊姣旇緝
.
缁撴灉锛?/p>
鍦ㄥ乏鍙炽�佸ご鑴氥�佽吂鑳屾柟鍚戠殑鎽嗕綅璇樊鍒嗗埆鏄?/p>
(-
0.62卤1.46)
mm
锛?/p>
(-
0.41卤1.54)
mm
锛?/p>
(-
0.31卤1.67)
mm
锛屽鎵╄竟鐣屽垎鍒槸
2.27
mm
锛?
1.87
mm
锛?/p>
1.98
mm.
缁撹锛?/p>
瀵逛簬澶撮閮ㄨ皟寮烘不鐤楃殑鎮ｈ�咃紝
CTV
鍒?/p>
PTV
鐨勫
鏀捐竟鐣屽湪宸﹀彸鏂瑰悜闇�瑕?/p>
2.5 mm
锛屽ご鑴氭柟鍚戝拰鑵硅儗鏂瑰悜闇�瑕?/p>
2 mm.
骞朵笖闅忕潃娌荤枟
鏃堕棿鐨勯�掕繘锛屾憜浣嶈宸病鏈夎寰嬫�х殑鍙樺寲
.
銆愬叧閿瘝銆?/p>
澶撮閮ㄨ偪鐦わ紱鎽嗕綅璇樊锛涚數瀛愬皠閲庡奖鍍忚缃紱鏁板瓧閲嶅缓鍥?/p>
鍍?/p>
0
寮曡█
鏀惧皠娌荤枟杩囩▼涓偅鑰呯殑鎽嗕綅鍋忓樊鏄奖鍝嶇簿纭不鐤楃殑鍏抽敭鍥犵礌锛岃秺鏄簿纭?/p>
鐨勬斁灏勬不鐤楋紝瀵圭収灏勪綋浣嶅拰鐓у皠閲庣殑鍑嗙‘鎬ц姹傝秺楂?/p>
.
浜嗚В鎽嗕綅鍋忓樊鐨勫ぇ灏忓拰
鏉ユ簮瀵瑰噺灏戞憜浣嶅亸宸拰纭畾鐓у皠閲庡悎閫傜殑澶栨斁杈圭晫鏄潪甯告湁鎰忎箟鐨?/p>
.
鏈爺绌跺
鐢靛瓙灏勯噹褰卞儚瑁呯疆
(electronic portal imaging
device, EPID)
鎷嶆憚鐨勬偅鑰?/p>
娌荤枟灏勯噹鍥惧儚涓庤鍒掔郴缁熸墍鐢熸垚鐨勬暟瀛楅噸寤哄皠閲庡浘鍍忥紙
digital reconstructed
radiography, DRR
锛夎繘琛屼簡姣旇緝
,
瀵硅皟寮烘斁灏勬不鐤楋紙
intensity modulated
radiation therapy, IMRT
锛夌殑澶撮閮ㄨ偪鐦ょ殑鎽嗕綅鍋忓樊杩涜娴嬮噺鍜岃宸垎鏋愶紝骞?/p>
涓旇绠楀嚭璁″垝璁捐鏃朵粠涓村簥闈跺尯锛?/p>
clinical target volume ,CTV
锛夊埌璁″垝闈跺尯