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Ontario Tech acknowledges the lands and people of the Mississaugas of Scugog Island First Nation.

We are thankful to be welcome on these lands in friendship. The lands we are situated on are covered by the Williams Treaties and are the traditional territory of the Mississaugas, a branch of the greater Anishinaabeg Nation, including Algonquin, Ojibway, Odawa and Pottawatomi. These lands remain home to many Indigenous nations and peoples.

We acknowledge this land out of respect for the Indigenous nations who have cared for Turtle Island, also called North America, from before the arrival of settler peoples until this day. Most importantly, we acknowledge that the history of these lands has been tainted by poor treatment and a lack of friendship with the First Nations who call them home.

This history is something we are all affected by because we are all treaty people in Canada. We all have a shared history to reflect on, and each of us is affected by this history in different ways. Our past defines our present, but if we move forward as friends and allies, then it does not have to define our future.

Learn more about Indigenous Education and Cultural Services

February 14, 2013

Speaker: Sofia Chavez, Centre for Addiction and Mental Health (CAMH)

Title: Overcoming the Challenges of Quantitative MRI: An Accurate and Fast T1 Mapping Method

Abstract: MRI can produce anatomical images with exquisite contrast, where the signal is a relative measure of intensity that is governed by MR sequence parameters (we control) and intrinsic tissue parameters. Quantitative MRI aims to extract the intrinsic tissue parameters from the image signal in a reasonable amount of scan time. However, the ability to accurately quantify an MR parameter is dependent on how accurately we can model the MR signal and how well we can measure the various factors included in the models. Most factors are subject dependent and thus require measurement on a per subject basis, resulting in lengthy, impractical scan times. In this talk I will review some of the most important MR parameters (T1, T2, proton density) that govern the signal contrast as well as discuss some magnetic field related inaccuracies that plague most quantitative measurements: B1 field inhomogeneities and slice profiles. I will illustrate the process of developing new quantitative MRI techniques by describing a new, accurate and fast T1 mapping method. I will also present current applications of this technique in the study of addiction and psychiatric disorders at CAMH.