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Aaron Hess


Senior MRI Physicist

  • Manage team, including DPhil students and Postdoc
  • Run research program in ultra high field MRI

High resolution cardiac MRI, with 7T and compressed sensing

My Research

My research seeks to advance cardiac MRI resolution using three advances in MRI technology: (i) measurement and correction of cardiac motion using new approaches, (ii) harnessing fast MRI with compressed sensing and (iii) ultra-high field MRI (7T). Together these technologies have the potential to improve assessment of small structures such as the atrial myocardium, blood flow, and function, and thereby help better individualise AF therapy (such as drugs and invasive procedures) and improve stroke risk prediction.

I currently managed the cardiac 7T imaging facility at OCMR. In this work we have shown that 7T measurements meet the theoretically expected increase in signal to noise for 4D flow and that cardiac perfusion has great potential. My current work is focused on measuring respiratory and cardiac motion using changes in conductivity of the subject as observed through a local MRI transmit array at 7T.

I work closely with MRI manufacturers on projects including new algorithums for compressed sensing, development of motion sensors, ultra high resolution angiography, 4D flow, and pulse sequences for 7T cardiac imaging.