Break토토 사이트g Optical Diffraction and Diffusion Limits: Multiscale

" Matching the nuclear magnetic 토토 카지노 (NMR) frequency to the frequency of a periodic electrophysiological activity enables direct visualization of the corresponding bio-function. I named the technique biomagnetic 토토 카지노. As for the applications of the biomagnetic 토토 카지노 techniques, I introduce heart magnetic 토토 카지노 (HMR) [1] and brainwave magnetic 토토 카지노 (BMR) [2]. HMR could be applied to development of a medical instrument localizing an abnormal myocardial excitation in hearts. In arrhythmia like atrial fibrillation or flutter, the excitation has rhythmic activity with its own characteristic frequency. The main idea of HMR is to match the NMR frequency to the specific frequency of the abnormal heart activity so that we could find the position of the reentry current generation by using the conventional magnetic 토토 카지노 imaging (MRI) methods. In BMR, matching the NMR frequency to the frequency of a periodic neural oscillation like alpha- or gamma-band waves enables direct visualization of the brain functional connectivity by MRI. Generally, the frequency of electrophysiological oscillation is very low, we need a new measurement technique other than using an inductive coil, which has consistent sensitivity even for such a low frequency. Currently, micro-Tesla NMR techniques based on superconducting quantum interference device (SQUID) are widely spreading in various applications like T1-enhanced contrast imaging for mapping cancer tissues. I demonstrate the feasibility of the new ideas by conducting numerical simulations and multi-source phantom MRI experiments with a SQUID-based micro-Tesla MRI equipment.

Meanwhile the micro-Tesla NMR has its own principal advantages in specific measurements. However, it has also intrinsic disadvantages like s토토 카지노ness in the pulse sequence, need of prepolarization, 토토 카지노 signal to noise ratio from wide detection bandwidth. In this talk, I introduce several breakthrough techniques which circumvent the disadvantages; rotary pulse excitation breaking the pulse-strength limitation from Bloch-Siegert effect and its applications, robust Baysian T1 estimation for 토토 카지노 SNR measurements, artifact rejection in high-prepolarization measurements, etc.



[1] K. Kim, Toward cardiac electrophysiological mapping based on micro-Tesla NMR: a novel modality for localizing the cardiac reentry, AIP Adv. 2, 022156 (2012).

[2] K. Kim, S.-J. Lee, C.S. Kang, S.-m. Hwang, Y.-H. Lee, K.K. Yu, Toward a brain functional connectivity mapping modality by simultaneous imaging of coherent brainwaves, Neuroimage 91(1; cover article), 63-69 (2014)."