Machine QA for the Elekta Unity system: A Report from the Elekta MR-linac consortium

被引：72

作者：

Roberts, David A. ^{[1
]}

Sandin, Carlos ^{[1
]}

Vesanen, Panu T. ^{[2
]}

Lee, Hannah ^{[3
]}

Hanson, Ian M. ^{[4
,5
]}

Nill, Simeon ^{[4
,5
]}

Perik, Thijs ^{[6
]}

Lim, Seng Boh ^{[7
]}

Vedam, Sastry ^{[8
]}

Yang, Jinzhong ^{[8
]}

Woodings, Simon W. ^{[9
]}

Wolthaus, Jochem W. H. ^{[9
]}

Keller, Brian ^{[10
]}

Budgell, Geoff ^{[11
]}

Chen, Xinfeng ^{[12
,13
]}

Li, X. Allen ^{[12
,13
]}

机构：

[1] Elekta Ltd, London Rd, Crawley RH10 9BL, England

[2] Philips Healthcare, Vantaa, Finland

[3] Allegheny Hlth Network, Canc Inst, Pittsburgh, PA USA

[4] Inst Canc Res, Joint Dept Phys, Sutton, Surrey, England

[5] Royal Marsden NHS Fdn Trust, Sutton, Surrey, England

[6] Antoni van Leeuwenhoek Hosp, Netherlands Canc Inst, Dept Radiat Oncol, Amsterdam, Netherlands

[7] Mem Sloan Kettering Canc Ctr, 1275 York Ave, New York, NY 10021 USA

[8] Univ Texas MD Anderson Canc Ctr, Dept Radiat Phys, Houston, TX 77030 USA

[9] Univ Med Ctr Utrecht, Dept Radiotherapy, Utrecht, Netherlands

[10] Sunnybrook Hlth Sci Ctr, Odette Canc Ctr, Toronto, ON, Canada

[11] Christie NHS Fdn Trust, Christie Med Phys & Engn, Wilmslow Rd, Manchester, Lancs, England

[12] Froedtert Hosp, Dept Radiat Oncol, Milwaukee, WI USA

[13] Med Coll Wisconsin, Milwaukee, WI 53226 USA

来源：

MEDICAL PHYSICS | 2021年 / 48卷 / 05期

关键词：

radiotherapy; quality assurance; MRI‐ linac; dosimetry;

D O I：

10.1002/mp.14764

中图分类号：

R8 [特种医学]; R445 [影像诊断学];

学科分类号：

1002 ; 100207 ; 1009 ;

摘要：

Over the last few years, magnetic resonance image-guided radiotherapy systems have been introduced into the clinic, allowing for daily online plan adaption. While quality assurance (QA) is similar to conventional radiotherapy systems, there is a need to introduce or modify measurement techniques. As yet, there is no consensus guidance on the QA equipment and test requirements for such systems. Therefore, this report provides an overview of QA equipment and techniques for mechanical, dosimetric, and imaging performance of such systems and recommendation of the QA procedures, particularly for a 1.5T MR-linac device. An overview of the system design and considerations for QA measurements, particularly the effect of the machine geometry and magnetic field on the radiation beam measurements is given. The effect of the magnetic field on measurement equipment and methods is reviewed to provide a foundation for interpreting measurement results and devising appropriate methods. And lastly, a consensus overview of recommended QA, appropriate methods, and tolerances is provided based on conventional QA protocols. The aim of this consensus work was to provide a foundation for QA protocols, comparative studies of system performance, and for future development of QA protocols and measurement methods.

引用

页码：E67 / E85

页数：19

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