Maritza Hobson


Affiliate Member

Medical Physics Unit, McGill University

Other appointments:

Medical Physicist, Department of Medical Physics,

McGill University Health Centre



Medical Physics Unit, L5-112
Montreal General Hospital, MUHC
1650 av Cedar
Montreal, QC H3G 1A4


(514) 934-1934 x43739


maritza.hobson [at]


PhD (Med Phys), University of Wisconsin-Madison (2008); Postdoctoral Diploma (Rad Oncology Phys), (2010)

Research focus:

Implementing portal dosimetry in the clinic, image QA metrics.

Key recent publications:

M.A. Hobson, S.D. Davis, Comparison between an in-house 1-D profile correction method and a 2-D correction provided in Varian's PDPC package for improving the accuracy of portal dosimetry images, J. Appl. Clin. Med. Phys. (under review).
M.A. Hobson, E.T. Soisson, S.D. Davis, W. Parker, Using the ACR CT accreditation phantom for routine image quality assurance on both CT and CBCT imaging systems in a radiotherapy environment, J. Appl. Clin. Med. Phys. 15, 226-239 (2014).
J. Jiang, T. Varghese, C. Brace, E. Madsen, S. Bharat, M.A. Hobson, J. Zagzebski, F. Lee, Young's modulus reconstruction for radio-frequency ablation electrode induced displacement fields: A feasibility study, IEEE Trans. Med. Imag. (2009).
M.A. Hobson, E.L. Madsen, G.R. Frank, H. Shi, J. Jiang, T.J. Hall, T. Varghese, Anthropomorphic phantoms for assessment of strain imaging methods involving saline-infused sonohysterography, Ultrasound Med. Biol. 34, 1622-1637 (2008).
E.L. Madsen, G.R. Frank, M.A. Hobson, S. Lin-Gibson, T.J. Hall, J. Jiang, T.A. Stiles, Instrument for determining the complex shear modulus of soft-tissue-like materials from 10 to 300 Hz, Phys. Med. Biol. 58, 5313-5342 (2008).
M.A. Hobson, M.Z. Kiss, T. Varghese, A.M. Sommer, M.A. Kliewer, J.A. Zagzebski, T.J. Hall, J. Harter, E.M. Hartenbach, E.L. Madsen, In vitro uterine strain imaging: Preliminary results, J. Ultrasound Med. 26, 899-908 (2007).
M.Z. Kiss, M.A. Hobson, T. Varghese, J Harter, M.A. Kliewer, E.M. Hartenbach, J.A. Zagzebski, Frequency-dependent complex modulus of the uterus: Preliminary results, Phys. Med. Biol. 51, 3683-3695 (2006).
E.L. Madsen, M.A. Hobson, G.A. Frank, H. Shi, J. Jiang, T.J. Hall, T. Varghese, M.M. Doyley, J.B. Weaver, ANthropomorphic breast phantoms for testing elastography systems, Ultrasound Med. Biol. 32, 857-874 (2006).
E.L. Madsen, M.A. Hobson, H. Shi, T. Varghese, G.R. Frank, Stability of hetereogeneous elastography phantoms made from oil dispersion in aqueous gels, Ultrasound Med. Biol. 32, 261-270 (2006).
E.L. Madsen, G.R. Frank, M.A. Hobson, H. Shi, J. Jiang, T. Varghese, T.J. Hall, Spherical lesion phantoms for testing the performance of elastography systems, Phys. Med. Biol. 50, 5983-5995 (2005).
E.L. Madsen, M.A. Hobson, H. Shi, T. Varghese, G.R. Frank, Tissue-mimicking agar/gelatin materials for use in heterogeneous elastography phantoms, Phys. Med. Biol. 50, 5597-5618 (2005).
J.I. Trombka, J. Schweitzer, C. Selavka, M. Dale, N. Gahn, S. Floyd, J. Marie, M.A. Hobson, J. Zeosky, K. Martin, T. McClannahan, P. Solomon, E. Gottschang, Crime scene investigations using portable, non-destructive space exploration technology, Forensic Sci. Int. 129, 1-9 (2002).