I am the Vice Chair of Research in the Department of Radiology of the Children's Hospital of Philadelphia. I have a particular interest in how the brain of a person with autism processes sounds, words and pictures. I use MEG technology (magnetoencephalography) to "map" the brains of children with autism by measuring the brain's electrical activity in space and time. The cutting edge technology in the MEG scanner allows me to measure electromagnetic signals from the brain, providing new insight into the mechanisms of autism and other neurodevelopmental disorders.
Additionally, I am interested in ways to improve techniques and methods in neuroradiology that enhance scientists' ability to look at the brain.
I have been working in the field of medical imaging for over 20 years. I obtained my BA, MA and PhD from Cambridge University in 1988, 1991 and 1992. In addition to my position at Children’s Hospital, I presently hold the Oberkircher Family Chair in Pediatric Radiology and am Professor of Radiology at the University of Pennsylvania. Prior to these appointments, I undertook a post-doctoral fellowship in the field of diffusion and perfusion MRI in the Department of Radiology at University of California at San Francisco (UCSF) with Mike Moseley and John Kucharczyk. I was on the faculty at UCSF from 1994 to 2002, where I established the Biomagnetic Imaging Laboratory in 1993 and was Professor and Vice Chair of the Department of Medical Imaging at the University of Toronto before moving to CHOP. I am Vice-President of the American Society for Functional Neuroradiology and Secretary of the International Society for the Advancement of Clinical MEG.
Cornew L, Roberts TP, Blaskey L, Edgar JC. Resting-State Oscillatory Activity in Autism Spectrum Disorders. J Autism Dev Disord. Epub, 2011.
Gaetz W, Edgar JC, Wang DJ, Roberts TP. Relating MEG measured motor cortical oscillations to resting y-Aminobutyric acid (GABA) concentration. Neuroimage . 2011. 55(2): 616-21.
Gandal MJ, Edgar JC, Ehrlichman RS, Mehta M, Roberts TP, Siegel SJ. Validating gamma oscillations and delayed auditory responses as translational biomarker of autism. Biol Psychiatry. 2010. 68(12): 1100-6.
Nagae L, Zarnow DM, Blaskey L, Dell J, Khan SY, Qaasmieh S, Levy SE, Roberts TP. Elevated mean diffusivity in the left hemisphere superior longitudinal fasciculus in autism spectrum disorders increases with more profound language impairment. Am. J Neuroradiol. Epub, 2012.
Roberts TP, Cannon KM, Tavabi K, Blaskey L, Khan S, Monroe JF, Qasmieh SA, Levy SE, Edgar JC. Auditory Magnetic Mismatch Field Latency: A Biomarker for Language Impairment in Autism. Biol Psychiatry. 2011. 70: 263-9.
Roberts TP, Heiken K, Khan SY, Qasmieh S, Solot C, Blaskey L, Parker WA, Verma R, Edgar JC. Delayed magnetic mismatch negativity field, but not auditory M100 response, in Specific Language Impairment. Neuroreport. 2012. 23(8): 463-8.
Roberts TP, Khan SY, Rey M, Monroe J, Cannon K, Blaskey L, Woldoff S, Qasmieh S, Gandal M, Schmidt G, Zarnow DM, Levy SE, Edgar JC. MEG Detection of Delayed Auditory Evoked Responses in Autism Spectrum Disorders: Towards An Imaging Biomarker for Autism. Autism Res. 2010. 3(1): 8-18.