High-resolution adaptive holographic interferometer for biomedical applications

2007 ◽  
Author(s):  
George Dovgalenko ◽  
Ayuna Dagdanova
Keyword(s):  
High Resolution ◽  
Biomedical Applications ◽  
Holographic Interferometer

Fiber optic multipoint high-resolution level sensor for biomedical applications

1995 ◽  
Author(s):  
Sergei N. Khotiaintsev ◽  
Victor de Leon Paredes ◽  
Esteban Molina-Flores ◽  
A. Zemliak ◽  
V. Svirid ◽  
...  
Keyword(s):  
High Resolution ◽  
Biomedical Applications ◽  
Fiber Optic ◽  
Level Sensor ◽  
Resolution Level

Ultralow-power high-resolution ADC for biomedical applications

2005 ◽  
Author(s):  
Lingraj Hiremath ◽  
Vinay Mallapur ◽  
Aleksandar Stojcevski ◽  
Jugdutt Singh ◽  
Hai P. Le ◽  
...  
Keyword(s):  
High Resolution ◽  
Biomedical Applications ◽  
Ultralow Power

scholarly journals GPU-based real-time generation of large ultrasound volumes from freehand 3D sweeps

2015 ◽  
Vol 1 (1) ◽  
pp. 286-289
Author(s):  
Philipp Jauer ◽  
Franziska Hainer ◽  
Floris Ernst
Keyword(s):  
High Resolution ◽  
Real Time ◽  
Pediatric Surgery ◽  
Biomedical Applications ◽  
3D Ultrasound ◽  
Recent Past ◽  
X Ray ◽  
Small Areas ◽  
Large Structures ◽  
Output Volume

AbstractIn the recent past, 3D ultrasound has been gaining relevance in many biomedical applications. One main limitation, however, is that typical ultrasound volumes are either very poorly resolved or only cover small areas. We have developed a GPU-accelerated method for live fusion of freehand 3D ultrasound sweeps to create one large volume. The method has been implemented in CUDA and is capable of generating an output volume with 0.5 mm resolution in real time while processing more than 45 volumes per second, with more than 300.000 voxels per volume. First experiments indicate that large structures like a whole forearm or high-resolution volumes of smaller structures like the hand can be combined efficiently. It is anticipated that this technology will be helpful in pediatric surgery where X-ray or CT imaging is not always possible.

scholarly journals Stem cell-laden hydrogel bioink for generation of high resolution and fidelity engineered tissues with complex geometries

2021 ◽  
Author(s):  
Oju Jeon ◽  
Yu Bin Lee ◽  
Sang Jin Lee ◽  
Nazilya Guliyeva ◽  
Joanna Lee ◽  
...  
Keyword(s):  
Stem Cell ◽  
High Resolution ◽  
Biomedical Applications ◽  
Human Mesenchymal Stem Cells ◽  
Complex Geometries ◽  
Complex Structures ◽  
Self Healing ◽  
3D Bioprinting ◽  
Healing Property

Recently, 3D bioprinting has been explored as a promising technology for biomedical applications with the potential to create complex structures with precise features. Cell encapsulated hydrogels composed of materials such as gelatin, collagen, hyaluronic acid, alginate and polyethylene glycol have been widely used as bioinks for 3D bioprinting. However, since most hydrogel-based bioinks may not allow rapid stabilization immediately after 3D bioprinting, achieving high resolution and fidelity to the intended architecture is a common challenge in 3D bioprinting of hydrogels. In this study, we have utilized shear-thinning and self-healing ionically crosslinked oxidized and methacrylated alginates (OMAs) as a bioink, which can be rapidly gelled by its self-healing property after bioprinting and further stabilized via secondary crosslinking. It was successfully demonstrated that stem cell-laden calcium-crosslinked OMA hydrogels can be bioprinted into complicated 3D tissue structures with both high resolution and fidelity. Additional photocrosslinking enables long-term culture of 3D bioprinted constructs for formation of functional tissue by differentiation of encapsulated human mesenchymal stem cells.

A Symmetric Group Control Dynamic Element Matching Method Applied in High Resolution SAR ADCs for Biomedical Applications

2020 ◽  
pp. 2150144
Author(s):  
Yushi Chen ◽  
Yiqi Zhuang
Keyword(s):  
High Resolution ◽  
Symmetric Group ◽  
Biomedical Applications ◽  
Dynamic Range ◽  
Random Number Generator ◽  
Dynamic Element Matching ◽  
Chip Area ◽  
Group Control ◽  
Control Dynamic ◽  
Dynamic Element

Capacitor mismatch plays an important part in the spurious-free dynamic range (SFDR) performance of high-resolution successive approximation register (SAR) analog-to-digital converters (ADCs). This paper presents a symmetric group control dynamic element matching (SGCDEM) method aiming at enhancing SFDR of SAR ADCs applied in biomedical applications. The proposed scheme symmetrically divides the capacitor array into four sub-DACs, using quantization results corresponding to each sub-DAC as rotary control codes to symmetrically control the rotation of the capacitors. In order to improve the energy efficiency and save chip area, the proposed method replaces the pseudo-random number generator (PRNG) with quantization results of ADC as the rotary control code. Moreover, split rotator technology is applied in the proposed scheme to reduce the number of multiplexers (MUX) used in the rotator, which introduces a low logic depth. The proposed architecture has been implemented on a 12-bit SAR ADC model in MATLAB in order to verify its performances. After taking a standard deviation of 1% for the unit capacitance into consideration, this method achieves above 77.3[Formula: see text]dB SFDR, enabling to correct the SFDR by more than 23.6[Formula: see text]dB compared with the structure without DEM.

High resolution AMS imaging of radiocarbon in biomedical applications

1997 ◽  
Vol 123 (1-4) ◽  
pp. 271-274 ◽  
Author(s):  
Z.X. Jiang ◽  
C. Bronk Ramsey ◽  
R.E.M. Hedges ◽  
P. Somogyi ◽  
J.D.B. Roberts ◽  
...  
Keyword(s):  
High Resolution ◽  
Biomedical Applications
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