Xiaoyu Yang
A5102773401- Advanced MRI Techniques and Applications
- Microwave Imaging and Scattering Analysis
- Ultrasound Imaging and Elastography
- Biosimilars and Bioanalytical Methods
- Advanced NMR Techniques and Applications
- Wireless Power Transfer Systems
- Advanced Radiotherapy Techniques
- Medical and Health Sciences Research
- Brain Metastases and Treatment
- Atomic and Subatomic Physics Research
- Wireless Body Area Networks
- Head and Neck Cancer Studies
- Medical Imaging Techniques and Applications
- Analog and Mixed-Signal Circuit Design
- Radiomics and Machine Learning in Medical Imaging
- VLSI and Analog Circuit Testing
- Radiation Dose and Imaging
- Ultrasound and Hyperthermia Applications
- Knee injuries and reconstruction techniques
- Digital Radiography and Breast Imaging
- Public Administration and Political Analysis
- Law and Political Science
- Advancements in PLL and VCO Technologies
- Clinical practice guidelines implementation
- Lung Cancer Research Studies
Quality Electrodynamics (United States)
2008-2024
Xiangya Hospital Central South University
2018-2019
Case Western Reserve University
2008
The radiofrequency (RF) receive array coil is a complicated device with many inductors and capacitors serves as one of the most critical magnetic resonance imaging (MRI) electronic devices. It directly determines achievable level signal-to-noise ratio (SNR). Simply put, however, RF nothing but an LC circuit. was first proposed more than 20 years ago, evolving from simple arrangement few channels to system 128 channels, enabling highly sophisticated parallel imaging, at different field...
We have developed a fully 3D data acquisition system for microwave breast imaging which can operate simultaneously inside magnetic resonance (MRI). MRI is used regularly to distinguish tumors from normal tissue. It generally has poor specificity unless with gadolinium contrast agent. Microwave could fill this need because of the good endogenous tumor:normal tissue property contrast, especially in light safety concerns gadolinium. The antenna array consists 16 monopole antennas positioned...
We are developing a new, compact microwave breast imaging tank that will allow us to acquire data from the patients' breasts while simultaneously being imaged in an MR system. Compatibility issues regarding mutual disruption of and images have been addressed has sufficiently reduced size modestly sized woman fit inside bore with tank. A custom coil integrated into minimize space it requires also increasing SNR by factor 3. present initial experiment where object is realistic phantom...
MR imaging at 7T provides a greater signal intensity, which yields some combination of signal-to-noise ratio, smaller voxel size, and/or faster scan times compared with lower field strengths. However, there remains room for improvement in terms image homogeneity and limited selection coils. In this work, we summarize ongoing efforts to develop single-transmit (STX) cervical spine (C-spine) parallel transmit (PTX) head coil. Both coils have more open design detachable anterior halves larger...
Several challenges are present when imaging the cervical spine in high-field MRI, such as achieving B1 coverage over desired anatomy while maximizing efficiency of transmitter. A array coil with a volume transmit birdcage was built and tested on system for improved previous prototypes. The consists partially shielded 22-rung transmitter 24 element receive RF array. new mechanical design larger eye windows improves clinical experience. Improved complete field region were confirmed through...
An 8-parallel transmit 32-Rx head coil was built and evaluated for performance in high-field MRI. The is comprised of an 8-rung curved degenerate birdcage transmitter a 32-loop element receive array. housing designed with anterior/posterior split eye windows patient comfort, sizable interior that can fit 99 percent the general population. A volunteer imaged to confirm coverage, which includes entire brain upper cervical spine. Good B1 uniformity, improved efficiency over previously...
The coaxial cables commonly used to connect RF coil arrays with the control console of an MRI scanner are susceptible electromagnetic coupling. As number channel increases, such coupling could result in severe heating and pose a safety concern. Non-conductive transmission solutions based on fiber-optic considered be one alternatives, but limited by high dynamic range ($>80$~dB) typical signals. A new digital system delta-sigma modulation (DSM) is developed address this problem. DSM-based...
Background: To evaluate the potential dosimetric gains of helical tomotherapy (HT) versus intensitymodulated radiotherapy (IMRT) or volume-modulated arc therapy (VMAT) for locally advanced nasopharyngeal carcinoma (NPC). Methods: A total 30 NPC patients were recruited to receive IMRT, VMAT optimized with Eclipse treatment planning system (TPS) (Version 11.0.31) and HT using TomoTherapy Hi-Art Software 2.0.7) (Accuray, Madison, WI, USA). All three techniques simultaneously delivering 60.06 Gy...
Objective To verify the accumulative dose of intensity-modulated radiotherapy (IMRT) nasopharyngeal carcinoma (NPC) using linac logfiles, and analyze relationship between leaf position errors multileaf collimator (MLC) distribution changes. Methods In total, 1 400 dynalog files 28 fractions 5 NPC patients were tracked recorded. MLC information was compared with planned to calculate each overall mean error all patients, which analyzed extracted through Argus program. The imported into...
We are developing a microwave breast imaging system that can operate simultaneously in magnetic resonance system. Being able to directly register the two image sets allows us exploit excellent spatial resolution of MR with more specific nature recovered dielectric properties. This fused configuration could ultimately obviate need for invasive contrast agents such as gadolinium. The integrated consists substantially slimmed down illumination tank custom 3-channel coil improved signal-to-noise...