Tuesday, March 26, 2013
Tuesday, February 19, 2013
Monday, January 28, 2013
Wednesday, January 23, 2013
For those who don't know, Reilly is the protagonist of one of my favourite novels, A Confederacy of Dunces, introduced to me by my 12th grade English teacher, who could clearly spot a misfit when she met one. Maybe it's a coincidence, but Confederacy won the Pulitzer Prize in 1981 (posthumously, another interesting, but sad, story), the same year as that Time cover.
Maybe the cover artists were one in the same (unlikely). Or maybe the Time's cover artist was a fan of the book (possible). Or maybe it was just "in the air". I'd like to think it was the latter, since it faintly echoes our (and many others', of course) belief that scientific visualizations are, extricably, a product of the broader culture in which they are created.
Labels: suggested readings
here and here). The first paper,
in press with published by Ultrasound in Medicine & Biology, shows that it may not always be reasonable to infer flow rate waveform shape from maximum Doppler velocity traces, particular using a Poiseuille assumption. The second paper, accepted published by Atherosclerosis, highlights the substantial errors that can arise when trying to infer wall shear stresses from Doppler velocities under the common assumption of fully-developed flow.
Paper Published: High-resolution CFD detects high-frequency velocity fluctuations in bifurcation, but not sidewall, aneurysms.
High-resolution CFD detects high-frequency velocity fluctuations in bifurcation, but not sidewall, aneurysms". Admittedly we faced some challenges getting this paper published, in part owing to our early (over)enthusiasm about the apparent association between velocity fluctuations and rupture status, but also because of our unavoidable conclusion that the bulk of published aneurysm CFD model studies may not be sufficiently resolved. This latter conclusion may be easy to dismiss because our simulations were carried out under steady inflow conditions (albeit at peak systolic flow rates), but not for long...
Tuesday, January 22, 2013
Another paper from our collaborators at Johns Hopkins, this one looking at the choice of MRI acquisition parameters can affect artery wall thickness and tissue characterization. With the help of BSL Master's student Alex Martinez, we used an analytic MRI simulation approach, which Luca Antiga and I had previously used to characterize wall thickness artifacts due to slice resolution and orientation, to confirm that decreased wall thickness measurements with increased echo time is the result of adventitial signal decay.