Dosimetric consequences of misalignment and realignment in prostate 3DCRT using intramodality ultrasound image guidance

Medical Physics
Danielle J FraserFrank Verhaegen

Abstract

It is common practice to correct for interfraction motion by shifting the patient from reference skin marks to better align the internal target at the linear accelerator's isocenter. Shifting the patient away from skin mark alignment causes the radiation beams to pass through a patient geometry different from that planned. Yet, dose calculations on the new geometry are not commonly performed. The intention of this work was to compare the dosimetric consequences of treating the patient with and without setup correction for the common clinical scenario of prostate interfraction motion. In order to account for prostate motion, 32 patients initially aligned to the room lasers via skin marks were realigned under the treatment beams by shifting the treatment couch based on ultrasound image guidance. An intramodality 3D ultrasound image guidance system was used to determine the setup correction, so that errors stemming from different tissue representations on different imaging modalities were eliminated. Two scenarios were compared to the reference static treatment plan: (1) Uncorrected patient alignment and (2) corrected patient alignment. Prostate displacement statistics and the dose to the clinical target volume (CTV), bladder, and...Continue Reading

References

May 1, 1995·Medical Physics·D W RogersT R Mackie
Feb 16, 1999·International Journal of Radiation Oncology, Biology, Physics·C RaschJ V Lebesque
Aug 25, 2000·Physics in Medicine and Biology·I Kawrakow, M Fippel
Dec 3, 2002·International Journal of Radiation Oncology, Biology, Physics·Eugene H HuangDeborah A Kuban
Oct 8, 2003·International Journal of Radiation Oncology, Biology, Physics·K M LangenM Roach
Jan 31, 2004·Seminars in Radiation Oncology·Thomas BortfeldEike Rietzel
Jan 31, 2004·Seminars in Radiation Oncology·Marcel van Herk
May 18, 2004·International Journal of Radiation Oncology, Biology, Physics·Xavier ArtignanHarry Bartelink
Nov 17, 2004·Medical Physics·Nigel P Orton, Wolfgang A Tomé
Feb 22, 2005·Medical Physics·Wamied Abdel-RahmanErvin B Podgorsak
Aug 23, 2005·Medical Dosimetry : Official Journal of the American Association of Medical Dosimetrists·Thomas E Byrne
Mar 28, 2006·International Journal of Radiation Oncology, Biology, Physics·Todd J ScarbroughCharles R Thomas
Apr 20, 2006·Strahlentherapie und Onkologie : Organ der Deutschen Röntgengesellschaft ... [et al]·Barbara DoblerFrederik Wenz
Jun 6, 2006·International Journal of Radiation Oncology, Biology, Physics·Helen A McNairDavid P Dearnaley
Oct 3, 2006·International Journal of Radiation Oncology, Biology, Physics·Jennifer C O'DanielDeborah A Kuban
Nov 19, 2008·International Journal of Radiation Oncology, Biology, Physics·Kevin C BylundJohn M Buatti
Sep 9, 2009·International Journal of Radiation Oncology, Biology, Physics·Naoki HayashiTatsuya Kobayashi

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Citations

Mar 3, 2012·Medical Physics·Guillaume LandryFrank Verhaegen
Oct 9, 2012·Medical Physics·Davide FontanarosaFrank Verhaegen
Jul 25, 2015·Ultrasound in Medicine & Biology·Denis ErmacoraDavide Fontanarosa
Apr 27, 2021·Physica Medica : PM : an International Journal Devoted to the Applications of Physics to Medicine and Biology : Official Journal of the Italian Association of Biomedical Physics (AIFB)·Charles K MatrosicBryan Bednarz

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