Raphael Sablong

Learn More
Prospective synchronization of MRI acquisitions on living organisms involves the monitoring of respiratory and heart motions. The electrocardiogram (ECG) signal is conventionally used to measure the cardiac cycle. However, in some circumstances, obtaining an uncorrupted ECG signal recorded on small animals with radio frequency (RF) pulses and gradient(More)
Optical characterization of biological tissues is of real interest to improve medical diagnosis and in particular in the detection of precancerous tissues. The reduced scattering coefficient mupsila<sub>s</sub> and the absorption coefficient mu<sub>a</sub> are the most commonly retrieved coefficients. Some methods also allow to obtain the anisotropy factor(More)
Diffuse reflectance techniques are commonly used to characterize the optical properties of various biological tissues in the visible and NIR spectral ranges. Nevertheless a sharp determination of local chromophores concentration in turbid media is usually difficult to obtain because of the nonlinear dependence of the reflected light intensity as a function(More)
The main challenge of noninvasive optical biopsy is to obtain an accurate value of the optical coefficients of an encapsulated organ (muscle, brain, etc.). The idea developed by us is that some interesting information could be deduced from the long-time behavior of the reflectance function. This asymptotic behavior is analyzed for layered media in the(More)
Optical characterization of biological tissues is of real interest to improve medical diagnosis and in particular in the detection of precancerous tissues. We propose a new non-invasive method allowing the estimation of the anisotropy factor. This method is based on the image analysis of the Q-element of Stokes vector backscattered from the turbid medium.(More)
  • 1