Our research is aimed at improving the therapeutic ratio in patients receiving radiotherapy for prostate cancer and other genitourinary (GU) malignancies. Our research focus is to improve the therapeutic ratio for prostate cancer by developing image-guided intensity-modulated radiotherapy techniques (IG-IMRT) that more precisely deliver radiotherapy to the target and away from critical normal tissues. We work in close collaboration with others in the GU group who are investigating novel imaging techniques intended to identify more precisely the gross tumor volume (GTV) for treatment planning purposes, and to evaluate response and identify new factors predictive of radiation response. We are evaluating acute and late toxicities of treatment and developing dose-volume models to predict toxicity.
  • Image-guided radiotherapy for genitourinary tumors
    • Assessment of prostate and normal tissue motion using cone beam computed tomography (CT) and four-dimensional magnetic resonance imaging.

    • Evaluation of online imaging techniques for measuring target motion during radiotherapy.

    • Development of intensity modulated radiotherapy (IMRT) approaches for treating prostate cancer, including dose escalation to pelvic lymph nodes and post-operative IMRT treatment techniques.

    • Prospective evaluation of late effects and mathematical modeling of dose-volume relationship to late effects.

    • In collaboration with Dr. Cynthia Ménard (Princess Margaret Cancer Centre Clinical Scientist), development and implementation of MR-guided brachytherapy for prostate cancer, with treatment optimization in individual patients.

    • Phase II and III trials evaluating dose escalation for high-risk prostate cancer, novel fractionation schemes for intermediate risk prostate cancer, and timing of radiation treatment for post-operative prostate cancer.
The evolution of fractionated prostate cancer radiotherapy.
Lancet. 2019 Jun 18;:
Catton C, Lukka H
Impact of Immobilization on Interfractional Errors for Upper Extremity Soft Tissue Sarcoma Radiation Therapy.
J Med Imaging Radiat Sci. 2019 Jun;50(2):308-316
Kim A, Kelly V, Dickie C, Catton C, Li W
Long-term oncological outcomes of patients with paratesticular sarcoma.
BJU Int. 2019 Apr 18;:
Goldberg H, Wong LM, Dickson B, Catton C, Yap SA, Alkasab T, Evans A, van der Kwast T, Jewett MAS, Hamilton RJ
Impact of high dose volumetric CT on PTV margin reduction in VMAT prostate radiotherapy.
Phys Med Biol. 2019 Feb 07;:
Cho YB, Alasti H, Kong V, Catton C, Berlin A, Chung P, Bayley A, Jaffray DA
Reply to J. David et al.
J Clin Oncol. 2018 Dec 28;:JCO1801718
Martin J, Lukka H, Catton C
Impact of perioperative chemotherapy and radiotherapy in patients with primary extremity soft tissue sarcoma: retrospective analysis across major histological subtypes and major reference centres.
Eur J Cancer. 2018 Oct 29;105:19-27
Callegaro D, Miceli R, Bonvalot S, Ferguson P, Strauss DC, Levy A, Griffin A, Hayes AJ, Stacchiotti S, Le Pèchoux C, Smith MJ, Fiore M, Dei Tos AP, Smith HG, Catton C, Casali PG, Wunder JS, Gronchi A
A Prospective Phase II Trial of Trans-perineal Ultrasound-Guided Brachytherapy for Locally Recurrent Prostate Cancer after External Beam Radiotherapy (NRG Oncology/RTOG -0526).
Int J Radiat Oncol Biol Phys. 2018 Oct 09;:
Crook JM, Zhang P, Pisansky TM, Trabulsi EJ, Amin MB, Bice W, Morton G, Pervez N, Vigneault E, Catton C, Michalski J, Roach M, Beyer D, Jani A, Horwitz E, Donavanik V, Sandler H
Symptom assessment to guide treatment selection and determine progression in metastatic castration-resistant prostate cancer: Expert opinion and review of the evidence.
Can Urol Assoc J. 2018 Sep;12(9):E415-E420
Saad F, Pouliot F, Danielson B, Catton C, Kapoor A
Symptom assessment to guide treatment selection and determine progression in metastatic castration-resistant prostate cancer: Expert opinion and review of the evidence.
Can Urol Assoc J. 2018 May 14;:
Saad F, Pouliot F, Danielson B, Catton C, Kapoor A
Long-Term Quality of Life of Retroperitoneal Sarcoma Patients Treated with Pre-Operative Radiotherapy and Surgery.
Cureus. 2017 Oct 11;9(10):e1764
Wong P, Kassam Z, Springer AN, Gladdy R, Chung P, Ringash J, Catton C

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Professor, Department of Radiation Oncology, University of Toronto