Mri Spin Echo Imaging

The Echo Nest and eMusic Announce Partnership

(Logo: http://photos.prnewswire.com/prnh/20101214/NE17511LOGO )

The first product bringing together this unique teaming of man and machine is eMusic Radio, launching in beta with dozens of curated radio programs based on emerging artists, local music scenes, and more. Programs are curated by eMusic's top-notch editorial staff and music writers, as well as industry influencers.

eMusic program curators can now use The Echo Nest's Playlist and Taste Profiling engine to create and enhance eMusic Radio programs efficiently, based on artist connections, song similarity, mood, style and detailed acoustic attributes: tempo, energy, danceability, time signature, and key.

By leveraging The Echo Nest's store of music information – the biggest in the world with over five billion musical data points – eMusic members can access an unprecedented level of musical depth and context.

This is the first in a series of new listening features that combine eMusic's editorial and The Echo Nest's powerful music intelligence platform to help eMusic members discover more new music. New applications will complement other discovery features, such as the authentic album and artist reviews currently available on eMusic.com.

"eMusic has always been about more than just access to music – it's long been a trusted source of musical insight and discovery," said , CEO of The Echo Nest. "This partnership gives us the freedom to work with eMusic on a series of applications aimed at giving the most serious fans new ways to broaden and deepen their musical understanding.

DrBicuspid Imaging

Two presentations at the Computer Assisted Radiology and Surgery (CARS) meeting in Berlin in June focused on the use of MRI for assessing carious lesions and acute periodontitis. And a recent study in European Radiology (July 31, 2011) compared MRI's ability to visualize dental and periodontal structures with that of multidetector CT and cone-beam CT.

At the CARS meeting, researchers from University Hospital of Ulm and the University of Ulm presented results from a 40-patient feasibility study that investigated the applicability of MRI for the in vivo identification of carious lesions.

The patients underwent a conventional clinical dental exam (including an x-ray), followed by a dental MRI exam within 14 days. The patients were selected randomly and already had various dental restorative materials, including gold, ceramic, amalgam, composites, and crowns, in their mouths.

All MRI exams were performed on a 3-tesla whole-body MRI system (Achieva, Philips Healthcare), and data were acquired twice with a prototype two-element carotid artery coil (120 x 50 mm). The scan times were 5:32 and 7:49 minutes, respectively.

The MRI protocol was completed in 37 of the patients, and a total of 157 lesions were identified. Of these, 137 lesions (85%) were clearly identifiable in the x-rays. Some occult occlusal lesions and secondary lesions were visible only in the MR images.

When the MR and x-ray images were compared and the lesion parameters quantified, there was a significant (p < 0.5) underestimation of the lesion dimensions by the x-rays, the researchers noted.

"The application of ultrashort echo-time MRI appears feasible for identification of caries lesions with high sensitivity," they wrote. "In direct comparison to x-ray techniques, MRI may be able to identify the real extent of the lesions instead of showing the areas with substantial breakdown of the local mineral structures only."

Further clinical evaluation is needed to determine whether the limited spatial resolution and prolonged acquisition times will hinder the routine use of MRI for caries diagnostics, they added.

Spin

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Echo