A method for determining the gantry angle for megavoltage beam imaging Journal Article
| Authors: | Sillanpaa, J.; Chang, J.; Amols, H.; Mageras, G. |
| Article Title: | A method for determining the gantry angle for megavoltage beam imaging |
| Abstract: | Accurate knowledge of gantry angle is essential in megavoltage cone beam imaging (MVCBI) with an electronic portal imager. We present a method for determining the gantry angle by detecting multileaf collimator (MLC) leaf positions in projection images. During image acquisition the gantry moves continuously and the MLC operates in dynamic arc mode. Our algorithm detects the leaf positions in the images and compares them with a stationary reference leaf. Comparison of the algorithm against angles determined from the locations of fiducial markers shows the accuracy (0.26° rms error) to be sufficient for MVCBI. © 2005 American Association of Physicists in Medicine. |
| Keywords: | methodology; image analysis; radiotherapy; algorithms; algorithm; collimator; radiotherapy planning, computer-assisted; patient positioning; radiotherapy, high-energy; particle accelerators; image display; radiographic image interpretation, computer-assisted; gantry angle; megavoltage radiation; electronic sensor |
| Journal Title: | Medical Physics |
| Volume: | 32 |
| Issue: | 2 |
| ISSN: | 0094-2405 |
| Publisher: | American Association of Physicists in Medicine |
| Date Published: | 2005-02-01 |
| Start Page: | 566 |
| End Page: | 569 |
| Language: | English |
| DOI: | 10.1118/1.1854776 |
| PUBMED: | 15789603 |
| PROVIDER: | scopus |
| DOI/URL: | |
| Notes: | --- - "Cited By (since 1996): 4" - "Export Date: 24 October 2012" - "CODEN: MPHYA" - "Source: Scopus" |
Altmetric
Citation Impact
BMJ Impact Analytics
Related MSK Work