Which IMRT? From "step and shoot" to VMAT: Physicist point of view

被引：10
|
作者：
Lafond, C. [1 ,2 ,3 ]
Jouyaux, F. [1 ]
Bellec, J. [1 ]
Henry, O. [1 ]
Perdrieux, M. [1 ]
Chajon, E. [1 ]
Le Prise, E. [1 ]
de Crevoisier, R. [1 ,2 ,3 ]
Manens, J. -P. [1 ,2 ,3 ]
机构：
[1] Ctr Eugene Marquis, F-35042 Rennes, France
[2] INSERM, U642, F-35000 Rennes, France
[3] Univ Rennes 1, LTSI, F-35000 Rennes, France
来源：
CANCER RADIOTHERAPIE | 2010年 / 14卷 / 6-7期
关键词：
Intensity modulated radiotherapy; VMAT; Dosimetry; Quality control; MODULATED ARC THERAPY; STATISTICAL PROCESS-CONTROL; DYNAMIC MULTILEAF COLLIMATION; DOSE CALCULATION ALGORITHMS; TREATMENT PLANNING SYSTEMS; IMAGE-GUIDED RADIOTHERAPY; RADIATION-THERAPY; PROSTATE-CANCER; INTENSITY MODULATION; DELIVERY;
D O I：
10.1016/j.canrad.2010.06.012
中图分类号：
R73 [肿瘤学];
学科分类号：
100214 ;
摘要：
Intensity-modulated radiation therapy (IMRT) is essential to have a dose distribution matching with the planning target volume (PTV) in case of concave-shape target. Today IMRT delivery techniques with linear accelerator can be divided into two classes: techniques with fixed gantry, called "step and shoot" (S&S) and "sliding window" (SW), and rotational techniques, called intensity modulated arc therapy (IMAT) and volumetric modulated arc therapy (VMAT). We discuss about constraints for IMRT implementation from dosimetric planning to treatment delivery. We compare S&S and VMAT performances concerning dose distribution quality, efficiency and delivery time. We describe quality controls that must be implemented and the methods for analysis and follow-up performances. VMAT tends to yield similar dose distribution to MRT with fixed gantry. VMAT also decreases monitor units as well as treatment delivery time to less than 5 minutes. However, VMAT is an IMRT technique more difficult to master than S&S technique because there are more variable parameters. (C) 2010 Societe francaise de radiotherapie oncologique (SFRO). Published by Elsevier Masson SAS. All rights reserved.
引用
收藏
页码：539 / 549
页数：11
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