Three-dimensional conformal setup (3D-CSU) of patients using the coordinate system provided by three internal fiducial markers and two orthogonal diagnostic X-ray systems in the treatment room

International Journal of Radiation Oncology, Biology, Physics
Hiroki ShiratoKazuo Miyasaka

Abstract

To test the accuracy of a system for correcting for the rotational error of the clinical target volume (CTV) without having to reposition the patient using three fiducial markers and two orthogonal fluoroscopic images. We call this system "three-dimensional conformal setup" (3D-CSU). Three 2.0-mm gold markers are inserted into or adjacent to the CTV. On the treatment couch, the actual positions of the three markers are calculated based on two orthogonal fluoroscopies crossing at the isocenter of the linear accelerator. Discrepancy of the actual coordinates of gravity center of three markers from its planned coordinates is calculated. Translational setup error is corrected by adjustment of the treatment couch. The rotation angles (alpha, beta, gamma) of the coordinates of the actual CTV relative to the planned CTV are calculated around the lateral (x), craniocaudal (y), and anteroposterior (z) axes of the planned CTV. The angles of the gantry head, collimator, and treatment couch of the linear accelerator are adjusted according to the rotation of the actual coordinates of the tumor in relation to the planned coordinates. We have measured the accuracy of 3D-CSU using a static cubic phantom. The gravity center of the phantom was c...Continue Reading

References

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Jun 15, 1999·Radiotherapy and Oncology : Journal of the European Society for Therapeutic Radiology and Oncology·M J ZelefskyG J Kutcher
Sep 7, 2000·International Journal of Radiation Oncology, Biology, Physics·H ShiratoK Miyasaka
Jul 4, 2002·International Journal of Radiation Oncology, Biology, Physics·Yvette SeppenwooldeKazuo Miyasaka
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Citations

Mar 24, 2007·International Journal of Clinical Oncology·Hiroki ShiratoRikiya Onimaru
Aug 6, 2011·Medical Physics·Carri K Glide-HurstDi Yan
Sep 9, 2009·International Journal of Radiation Oncology, Biology, Physics·Hiroshi FujiShigeyuki Murayama
Nov 7, 2006·International Journal of Radiation Oncology, Biology, Physics·Alan M NicholDavid A Jaffray
Oct 3, 2006·Seminars in Radiation Oncology·Steve B Jiang
May 13, 2006·Medical Dosimetry : Official Journal of the American Association of Medical Dosimetrists·Steve B Jiang
Apr 20, 2006·Radiotherapy and Oncology : Journal of the European Society for Therapeutic Radiology and Oncology·Daniel VetterliDaniel M Aebersold
Apr 4, 2006·International Journal of Radiation Oncology, Biology, Physics·Masataka OitaKazuo Miyasaka
Aug 20, 2005·International Journal of Radiation Oncology, Biology, Physics·Mikado ImuraMasaharu Nishimura
Jun 29, 2005·Seminars in Radiation Oncology·Michael G Herman
Jun 11, 2011·International Journal of Radiation Oncology, Biology, Physics·Shinichi ShimizuHiroki Shirato
Sep 7, 2016·Cancer radiothérapie : journal de la Société française de radiothérapie oncologique·A MègeB Chauvet
Nov 21, 2008·Journal of Applied Clinical Medical Physics·Christopher NelsonGeorge Starkschall
Jan 24, 2007·Technology in Cancer Research & Treatment·Joseph BarbiereMaria F Chan
Nov 13, 2009·Cardiovascular and Interventional Radiology·Evangelia SotiropoulouLoukas Thanos

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