On 12/28/12 mebrezin said:

"I think the combination of OCT with techniques that involve quantum correlations is an important future direction for OCT. This paper demonstrates that not all quantum correlations are entanglement, and likely other forms of correlations are more practical as they can be used under ambient condition with traditional sources. Quantum correlations can be established with either first or second order correlations. It also demonstrates that the Science paper entangling diamonds was not true entanglement."

On 9/11/12 mebrezin said:

"Thinking the quantum effects, particularly quantum correlations, can only come from low output entangled photon sources (SPDC) limits the field. The paper describes how quantum correlations can be established with conventional thermal sources (previously paper in PRA) and in some cases first order correlations. We also interpret the recent "entangled diamond' experiment not as true entanglement but first order correlations with local entanglement. Though second order correlations assessments are not OCT, they can be performed within an OCT system so hopefully this work will expand the applications of OCT."

On 9/6/12 mebrezin said:

"For more information on the different SOC in addition to entangled photons, see http://arxiv.org/abs/1209.1081 "

On 8/31/12 mebrezin said:

"Addenum: No vacuum is needed, photons are produced at normal intensities for OCT, and conditions are ambient. This is distinct from entangled photons."

On 8/31/12 mebrezin said:

"SOC, with respect to photons, are when photon pairs register at two different detectors correlated in space, time, or state (ex:spin or polarization). Their are actually at least four type. The first are essentially classical coincidences and their density operators are separable. The second are entangled photons where after interaction of two photons (or entanglement swapping with the Brune experiments being examples), there eigenvalues are correlated independent of the basis chosen. Example would be the the Einstein, Rosen, Podolsky, Bohm thought experiments (EPR-B) which people are generally familiar with. Pure entangelemnt does not require indistinguishable pats but are used for interference experiments. The last two deal with in quantum correlations with result from the indistinguishable paths. The first uses indistinguishable paths, but their is a 50% DC signal which if not removed, results in 50% visibility (true entanglement can reach 100% visibility. The quantum correlations can only occur if the paths are indistinguishable AT THE TIME OF MEASUREMENT, so the length of the photon wavepacket and detector time influence it. This is not the case for true entanglement, but quantum correlations from indistinguishable paths may be more robust to deocherence then entanglement. This is in our PRA paper, Shih's textbook "An Introduction to Quantum Optics: Photons and BiPhotons", or the ghost imaging literature. The fourth relates to first order indistingusihable paths and nearly identical LOCAL entanglements in each arm. This we believe is the basis of the recent "Entangled Diamond experiment" in Science but is too detailed a discussion and should be published by our group in the near future. Sorry for the long answer but to summarize the grant deals with quantum correlations from thermal SOC photons and not entangled SOC photons."

On 8/28/12 mebrezin said:

"Yes, OCTNews is a great resource. Thanks for all the work."

On 8/28/12 mebrezin said:

"Is this comment about the pigtail catheter related to the enamel article above it?
"

On 8/26/12 mebrezin said:

"Also see" Christopher Vercollone et al, 'New Technological Approach to Study Rotator Cuff Pathology' J. Musculoskelet. Res. 15, 1250010 (2012) [6 pages] DOI: 10.1142/S0218957712500108"

On 8/26/12 mebrezin said:

"See "Current capabilities and challenges for optical coherence tomography as a high-impact cardiovascular imaging modality.
Brezinski ME. Circulation. 2011 Jun 28;123(25):2913-5. " for explanation of need for improved lipid imaging.

See "PHYSICAL REVIEW A 78, 063824
2008" for theory of the approach."

On 11/24/11 mebrezin said:

"This is a potentially huge area for cardiovascular OCT. Chronic occlusions are extremely difficult to get through as the wire often 'wants' to track through the vessel wall than the hard plaque. OCT guidance could potentially avoid this substantial and common challenge. "

On 11/23/11 mebrezin said:

"This study is a confirmatory observation which is nice, but the field has been for years in desperate need of outcomes studies. Outcomes studies effect patient management because look at the effects of patient parameters (stent position) and not outcomes. In the BES, maximum expansion was critical. In the era of DES, it does not seem to be case but it is not addressed here. Essentially as a cardiologist, the only point I need to know is whether improved expansion of the stent effects the incidence of late occlusion Not addressed here. This confirms IVUS work, DES stents aren't maximally expanded, but does it matter. This criticism is not a unique to these authors. OCT has been in patient arteries for approaching 12 years. But studies that look at outcome are almost non-existent on a relative scale. Outcome studies are more work because you have to follow patients and statistical analysis is more challanging (as well as design). Does this change patient management? As far as I can see no. If this was an outcome study, publishing the year 1 results gives you the same information here, plus you know outcomes at the end of the study. These observational studies make for great pictures, but it long been time to answer whether outcomes change."