Technologies of image guidance and the development of advanced linear accelerator systems for radiotherapy

Wing Cheung Vincent Wu, Maria Y.Y. Law, Josh Star-Lack, Fion W.K. Cheung, C. Clifton Ling

Research output: Chapter in book / Conference proceedingChapter in an edited book (as author)Academic researchpeer-review


As advanced radiotherapy approaches for targeting the tumor and sparing the normal tissues have been developed, the image guidance of therapy has become essential to directing and confirming treatment accuracy. To approach these goals, image guidance devices now include kV on-board imagers, kV/MV cone-beam CT systems, CT-on-rails, and mobile and in-room radiographic/ fluoroscopic systems. Nonionizing sources, such as ultrasound and optical systems, and electromagnetic devices have been introduced to monitor or track the patient and/or tumor positions during treatment. In addition, devices have been designed specifically for monitoring and/or controlling respiratory motion. Optimally, image-guided radiation therapy systems should possess 3 essential elements: (1) 3D imaging of soft tissues and tumors, (2) efficient acquisition and comparison of the 3D images, and (3) an efficacious process for clinically meaningful intervention. Understanding and using these tools effectively is central to current radiotherapy practice. The implementation and integration of these devices continue to carry practical challenges, which emphasize the need for further development of the technologies and their clinical applications.
Original languageEnglish
Title of host publicationIMRT, IGRT, SBRT
Subtitle of host publicationAdvances in the Treatment Planning and Delivery of Radiotherapy: Second Edition
PublisherS. Karger AG
Number of pages33
ISBN (Electronic)9783805596817
ISBN (Print)9783805596800
Publication statusPublished - 27 May 2011

ASJC Scopus subject areas

  • General Medicine
  • General Physics and Astronomy


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