Magnetic Resonance Imaging news, information, and journal club, with minimal spin.
From the category archives:
Ars Technica has a nice writeup about a paper in Nature which isolates the BOLD signal from a specific type of neuron:
With everything in place, the researchers confirmed that firing an impulse in excitatory neurons produced a signal that matched nicely with the ones observed during regular experiments. Putting the channelrhodopsin into inhibitory neurons produced [...]
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(In addition to MRI and medical physics, it’s worth keeping an open mind and keeping tabs on various other branches of physics and science. To that end, I’ll highlight interesting papers or research that strikes my fancy from time to time.)
Eric Berger aka SciGuy, a science columnist at the Houston Chronicle, points to a new [...]
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Magnetic resonance imaging of acute “wiiitis” of the upper extremity.
We present the first reported case of acute “wiiitis”, documented clinically and by imaging, of the upper extremity, caused by prolonged participation in a physically interactive virtual video-game. Unenhanced magnetic resonance imaging (MRI) demonstrated marked T2-weighted signal abnormality within several muscles of the shoulder and upper [...]
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That’s “not safe for work”, not “national science foundation” up there in the acronym. It was surely inevitable that this amazing, subtle and elegant technology would eventually be applied to more scatological pursuits. The following paper is a classic in this genre.
Magnetic resonance imaging of male and female genitals during coitus and female sexual [...]
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One of the more interesting abstracts from last year’s ISMRM in Seattle has now been published as a full manuscript:
Propeller EPI in the other direction
A new propeller EPI pulse sequence with reduced sensitivity to field inhomogeneities is proposed. Image artifacts such as blurring due to Nyquist ghosting and susceptibility gradients are investigated and compared with [...]
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PROPELLER-EPI with parallel imaging using a circularly symmetric phased-array RF coil at 3.0 T: application to high-resolution diffusion tensor imaging
A technique integrating multishot periodically rotated overlapping parallel lines with enhanced reconstruction (PROPELLER) and parallel imaging is presented for diffusion echo-planar imaging (EPI) at high spatial resolution. The method combines the advantages of parallel imaging to [...]
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Ars Technica has a nice summary of a recent paper in PLoS that attempted to assess the quality of the peer review process. From the Ars summary:
To examine what makes a good reviewer, they took advantage of the journal Annals of Emergency Medicine, which has maintained a detailed database of reviewers and post-review ratings (on [...]
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