Imaging photoplethysmography for clinical assessment of cutaneous microcirculation at two different depths

the role of application of dynamic assessment approach in improvement of iranian efl writing performance at different language proficiency levels

the present study sought to investigate the role of dynamic assessment (da) in improvement of iranian efl writing performance at different language proficiency levels. to this end, after conducting the quick placement test, 60 iranian efl learners were assigned to two groups with different language proficiency levels. in both groups each participant wrote two compositions, one before and one af...

Simultaneous recording of skin blood pulsations at different vascular depths by multiwavelength photoplethysmography.

A new technique for parallel recording of reflection photoplethysmography (PPG) signals in a broad spectral band (violet to near-infrared) has been developed, and its potential for assessment of blood microcirculation at various depths from the skin surface is discussed. PPG signals have been simultaneously detected at cw laser wavelength sets comprising 405, 532, 645, 807, and 1064 nm. Various...

Blood flow measurements at different depths using photoplethysmography and laser Doppler techniques.

BACKGROUND/PURPOSE This study has evaluated a multi-parametric system combining laser Doppler flowmetry and photoplethysmography in a single probe for the simultaneous measurement of blood flow at different depths in the tissue. This system will be used to facilitate the understanding of pressure ulcer formation and in the evaluation of pressure ulcer mattresses. METHODS The blood flow in the...

simultaneous two - photon calcium imaging at different depths with spatiotemporal multiplexing

nature methods | ADVANCE ONLINE PUBLICATION | Optical probing of neuronal activity with fluorescent calcium indicators is a powerful approach to study information processing in the brain1. In particular, calcium imaging with two-photon laser scanning microscopy (2PLSM)2 is an ideal tool for recording network activity in vivo because it is less invasive than electrophysiology, more cells can be ...

Evaluation of Reflection Optical Imaging Characteristics Using Fluorescence with Near Infrared Wavelength at Different Depths of Tissue Equivalent Phantom