Siavash Atrchian, MD FRCPC


Clinical Assistant Professor
Division of Radiation Oncology and Developmental Radiotherapeutics
UBC Department of Surgery

Active Staff, Radiation Oncologist
Department of Radiation Oncology
BC Cancer – Kelowna

BC Cancer – Kelowna
Sindi Ahluwalia Hawkins Centre for the Southern Interior
399 Royal Avenue
Kelowna BC V1Y 5L3

Phone: 250.979.6645
Fax: 250.712.3911


Special Interests

  • SABR (Stereotactic Ablative Radiotherapy)
  • Lung Cancer
  • Breast Cancer
  • Gastrointestinal Cancer
  • The Role of Microbiome in Cancer Development
  • Deep Learning Applications in Radiation Oncology
  • Postgraduate Medical Education

Selected Publications and Abstracts

Wong J, Huang V, Giambattista J, Teke T, Kolbeck C, Giambattista J,  Atrchian S, Training and Validation of Deep Learning-Based Auto-Segmentation Models for Lung Stereotactic Ablative Radiotherapy Using Retrospective Radiotherapy Planning Contours, Frontiers in Oncology, 07 June 2021

Lin T, Atrchian S, Humer M, Siever J, Lin A, Clinical Outcomes of Pancoast Tumors Treated with Trimodality Therapy Journal of Thoracic Disease, 2021 Jun;13 (6):3529-3538. doi: 10.21037/jtd-21-380

Murchison S, DeVries K , Atrchian S, Patient Outcomes With Dose Escalation Using Modern Radiotherapy Techniques: A Retrospective Review of Anal Cancer Treated at a Large Academic Institution Between 2010 and 2016, Cureus. 2020 Oct 16;12(10):e10989. doi: 10.7759/cureus.10989

Chen J, Douglass J, Prasath V, Neace M, Atrchian S, Manjili MH, Shokouhi S, Habibi M, The microbiome and breast cancer: A review, Breast Cancer Res Treat. 2019 Dec; 178(3):493-496. Doi: 10.1007/s10549-019-05407-5. Epub 2019 Aug 27

Atrchian S, Sadeghi P, Cwajna W, Helyer L, Rheaume D, Nolan M, Sadeghi P, Rutledge R, Calverley V, Bennet S, Robar J, Improvement of Consistency in Delineation Breast Lumpectomy Cavity Using Surgical Clips. J Surg Res. 2018 Jan; 221:30-34. Doi: 10.1016/j.jss.2017.07.033

Robert Olson, W Jiang, M Liu, A Bergman, D Schellenberg, B Mou, A Alexander, H Carolan, F Hsu, S Miller, S Atrchian, E Chan, C Ho, I Mohamed, A Lin, T Berrang, A Bang, N Chng, Q Matthews, V Huang, A Mestrovic, D Hyde, C Lund, H Pai, B Valev, S Lefresne, S Tyldesley, Population-based phase II trial of SABR for up to 5 Oligometastases: Preliminary Results of the SABR-5 trial, ASTRO 2021, Chicago, USA

Atrchian S, Lin A, Lucas S, Rajapakshe R, Lali A, Germain F, Adjuvant Radiation Treatment Using High Tangent Technique in Breast Carcinomas: Review of Our Experience at BC Cancer Kelowna, CARO 2020, Toronto, Canada, ASTRO 2020, Miami, USA

Mou B, McGregor S, Baliski C, Atrchian S, Lucas S, Lin A, Germain F, Mohamed I, Wait times for adjuvant breast radiotherapy in the British Columbia Southern Interior, CARO 2017, Toronto, Canada

Atrchian S, Hsu F, Badragan I, Yu R, Supine vs. Prone positioning on reproducibility and acute toxicity for rectal cancer, CARO 2013, Montreal, Canada

Atrchian S, Hollenhorst H, Wilke D, Rajaraman M, Intensity Modulated Radiation Therapy (IMRT) versus Chemo-IMRT in the treatment of stage III-IV Pharyngeal carcinoma: A retrospective study at the Nova Scotia Cancer Center, CARO 2009, Quebec City, Canada