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Sensors, Vol. 23, Pages 2592: Modeling of Rapid Pam Systems Based on Electrothermal Micromirror for High-Resolution Facial Angiography
huqing Wang In this paper, a portable photoacoustic microscopy (PAM) system is proposed based on a large stroke electrothermal micromirror to achieve high resolution and fast imaging. The crucial micromirror in the system realizes a precise and efficient 2-axis control. Two different designs of electrothermal actuators with “O” and “Z” shape are evenly located around the four directions of mirror plate. With a symmetrical structure, the actuator realized single direction drive only. The finite element modelling of both two proposed micromirror has realized a large...
Source: Sensors - February 26, 2023 Category: Biotechnology Authors: Yuanlin Xia Yujie Wang Tianxiang Liang Zhen Peng Liang He Zhuqing Wang Tags: Article Source Type: research

Sensors, Vol. 22, Pages 2302: Investigation of Flow Changes in Intracranial Vascular Disease Models Constructed with MRA Images
This study aimed to develop a magnetic resonance imaging (MRI)-compatible flow delivery system and individualized models of circle of Willis (CoW), which include 50% and 100% blockage in internal carotid artery (ICA50 and ICA100), and 100% blockage in vertebral artery (VA100). Images were obtained using 3D time-of-flight and phase-contrast magnetic resonance angiography (MRA) sequences, and changes in velocity and flow direction at CoW models were analyzed. For the ICA50 and VA100 models, the flow was similar to that of the normal model. For the ICA 50 model, it was found that 50% blockage did not affect cerebral blood flo...
Source: Sensors - March 16, 2022 Category: Biotechnology Authors: Jeong-Heon Kim Ju-Yeon Jung Yeong-Bae Lee Chang-Ki Kang Tags: Article Source Type: research

Sensors, Vol. 21, Pages 8099: Detection of Collaterals from Cone-Beam CT Images in Stroke
Sobri Muda Collateral vessels play an important role in the restoration of blood flow to the ischemic tissues of stroke patients, and the quality of collateral flow has major impact on reducing treatment delay and increasing the success rate of reperfusion. Due to high spatial resolution and rapid scan time, advance imaging using the cone-beam computed tomography (CBCT) is gaining more attention over the conventional angiography in acute stroke diagnosis. Detecting collateral vessels from CBCT images is a challenging task due to the presence of noises and artifacts, small-size and non-uniform structure of vessels. T...
Source: Sensors - December 3, 2021 Category: Biotechnology Authors: Azrina Abd Abd Aziz Lila Iznita Izhar Vijanth Sagayan Asirvadam Tong Boon Tang Azimah Ajam Zaid Omar Sobri Muda Tags: Article Source Type: research