High-power synchronized dual-channel laser enabling fast 2- and 3-photon in vivo brain imaging

2018 ◽  
Author(s):  
R. Riedel ◽  
M. Schulz ◽  
I. Grguras ◽  
T. Golz ◽  
M. J. Prandolini
Keyword(s):  
Brain Imaging ◽  
High Power ◽  
Dual Channel

High power OPCPA system for in-vivo 2- and 3-photon brain imaging

2021 ◽  
Author(s):  
Michael Schulz ◽  
Thomas Braatz ◽  
Ekaterina Zapolnova ◽  
Jan Heye Buss ◽  
Torsten Golz ◽  
...  
Keyword(s):  
Brain Imaging ◽  
High Power

Compact High Power OPCPA System for 2-photon and 3- photon In-Vivo Brain Imaging

2021 ◽  
Author(s):  
Michael Schulz ◽  
Torsten Golz ◽  
Ivanka Grguras ◽  
Thomas Braatz ◽  
Ekaterina Zapolnova ◽  
...  
Keyword(s):  
Brain Imaging ◽  
High Power

In silico and in vivo study of radio-iodinated nefiracetam as a radiotracer for brain imaging in mice

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
M. H. Sanad ◽  
A. B. Farag ◽  
S. F. A. Rizvi
Keyword(s):  
Brain Imaging ◽  
Radiochemical Purity ◽  
High Yield ◽  
High Uptake ◽  
Oxidizing Agent ◽  
Receptor Ligand ◽  
Nootropic Agent ◽  
Biodistribution Studies

Abstract This study presents development and characterization of a radiotracer, [125I]iodonefiracetam ([125I]iodoNEF). Labeling with high yield and radiochemical purity was achieved through the formation of a [125I]iodoNEF radiotracer after investigating many factors like oxidizing agent content (chloramines-T (Ch-T)), substrate amount (Nefiracetam (NEF)), pH of reaction mixture, reaction time and temperature. Nefiracetam (NEF) is known as nootropic agent, acting as N-methyl-d-aspartic acid receptor ligand (NMDA). The radiolabeled compound was stable, and exhibited the logarithm of the partition coefficient (log p) value of [125I]iodonefiracetam as 1.85 (lipophilic). Biodistribution studies in normal mice confirmed the suitability of the [125I]iodoNEF radiotracer as a novel tracer for brain imaging. High uptake of 8.61 ± 0.14 percent injected dose/g organ was observed in mice

Identification and Morphologic Assessment of Mesocoelic Recess by In Vivo Human Brain Imaging With 7.0-T Magnetic Resonance Imaging

2011 ◽  
Vol 35 (4) ◽  
pp. 486-491 ◽  
Author(s):  
Na Rae Kim ◽  
Je G. Chi ◽  
Sang Han Choi ◽  
Young-Bo Kim ◽  
Hee Young Hwang ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Human Brain ◽  
Brain Imaging ◽  
Resonance Imaging

scholarly journals Cerebrovascular responses of the rat brain to noxious stimuli as examined by functional near-infrared whole brain imaging

2012 ◽  
Vol 107 (10) ◽  
pp. 2853-2865 ◽  
Author(s):  
Ji-Wei He ◽  
Fenghua Tian ◽  
Hanli Liu ◽  
Yuan Bo Peng
Keyword(s):  
Brain Imaging ◽  
Near Infrared ◽  
Small Animal ◽  
Nir Spectroscopy ◽  
Brain Regions ◽  
Anterior Cingulate ◽  
Hemodynamic Changes ◽  
Whole Brain ◽  
Brain Hemodynamics

While near-infrared (NIR) spectroscopy has been increasingly used to detect stimulated brain activities with an advantage of dissociating regional oxy- and deoxyhemoglobin concentrations simultaneously, it has not been utilized much in pain research. Here, we investigated and demonstrated the feasibility of using this technique to obtain whole brain hemodynamics in rats and speculated on the functional relevance of the NIR-based hemodynamic signals during pain processing. NIR signals were emitted and collected using a 26-optodes array on rat's dorsal skull surface after the removal of skin. Following the subcutaneous injection of formalin (50 μl, 3%) into a hindpaw, several isolable brain regions showed hemodynamic changes, including the anterior cingulate cortex, primary/secondary somatosensory cortexes, thalamus, and periaqueductal gray ( n = 6). Time courses of hemodynamic changes in respective regions matched with the well-documented biphasic excitatory response. Surprisingly, an atypical pattern (i.e., a decrease in oxyhemoglobin concentration with a concomitant increase in deoxyhemoglobin concentration) was seen in phase II. In a separate group of rats with innocuous brush and noxious pinch of the same area ( n = 11), results confirmed that the atypical pattern occurred more likely in the presence of nociception than nonpainful stimulation, suggesting it as a physiological substrate when the brain processes pain. In conclusion, the NIR whole brain imaging provides a useful alternative to study pain in vivo using small-animal models. Our results support the notion that neurovascular response patterns depend on stimuli, bringing attention to the interpretation of vascular-based neuroimaging data in studies of pain.

In vivo evaluation of mastication noise reduction for dual channel implantable microphone

2014 ◽  
Vol 24 (1) ◽  
pp. 439-444 ◽  
Author(s):  
SeongTak Woo ◽  
EuiSung Jung ◽  
HyungGyu Lim ◽  
Jang Woo Lee ◽  
Ki Woong Seong ◽  
...  
Keyword(s):  
Noise Reduction ◽  
In Vivo Evaluation ◽  
Dual Channel ◽  
Implantable Microphone

Implantable integrated photonic probe for light sheet brain imaging in vivo

2021 ◽  
Author(s):  
Nathan C. Lin ◽  
Xuan Zhao ◽  
Sakib Hassan ◽  
Ankit Raghuram ◽  
Ashok Veeraraghavan ◽  
...  
Keyword(s):  
Brain Imaging ◽  
Light Sheet
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