Evaluation of the ability of a 2D ionisation chamber array and an EPID to detect systematic delivery errors in IMRT plans

被引：4

作者：

Bawazeer, Omemh ^{[1
]}

Gray, Alison ^{[2
]}

Arumugam, Sankar ^{[2
]}

Vial, Philip ^{[1
,2
]}

Thwaites, David ^{[1
]}

Descallar, Joseph ^{[2
]}

Holloway, Lois ^{[1
,2
,3
,4
]}

机构：

[1] Univ Sydney, Sch Phys, Inst Med Phys, Sydney, NSW 2006, Australia

[2] Liverpool & Macarthur Canc Therapy Ctr & Ingham I, Liverpool, NSW, Australia

[3] Univ Wollongong, Ctr Med Radiat Phys, Wollongong, NSW, Australia

[4] Univ New South Wales, Sch Med, South West Clin Sch, Sydney, NSW, Australia

来源：

XVII INTERNATIONAL CONFERENCE ON THE USE OF COMPUTERS IN RADIATION THERAPY (ICCR 2013) | 2014年 / 489卷

关键词：

D O I：

10.1088/1742-6596/489/1/012071

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Two clinical intensity modulated radiotherapy plans were selected. Eleven plan variations were created with systematic errors introduced: Multi-Leaf Collimator (MLC) positional errors with all leaf pairs shifted in the same or the opposite direction, and collimator rotation offsets. Plans were measured using an Electronic Portal Imaging Device (EPID) and an ionisation chamber array. The plans were evaluated using gamma analysis with different criteria. The gamma pass rates remained around 95% or higher for most cases with MLC positional errors of 1 mm and 2 mm with 3%/3mm criteria. The ability of both devices to detect delivery errors was similar.

引用

页数：5

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