ABSTRACT
Objective To improve the theory and practice learning of the students majoring in medical imaging by investigating the teaching method of"Medical Electronics"course.Methods The problems in teaching"Medical Electronics"course were summarized, and the causes were analyzed. Results Some improvement measures were proposed for teaching"Medical Electronics"course with considerations on the professional background of the students and the characteristics of the course, which proved its efficiency through practical trial. Conclusion For teaching medical students in electronics technology course,the methods such as integrating and optimizing contents of course,guided teaching as well as experiments and discussions by groups,have significant effects on improving students'learning enthusiasm and teaching efficiency.
ABSTRACT
To further optimize and improve upon our MIT experiment system, the simulation study of the ideal physical model of our single channel measurement system of MIT is carried out with finite difference time domain (FDTD) method. According to antenna theory, an excitation coil similar to a helix is modeled as a stack of electric and magnetic sources. The current phase deviation of the single MIT-channel between the excitation and receiver coils is analysed with three ideal spherical models of the human brain. The brain model considers the skull, the cerebrospinal fluid, the brain tissue and an edema. The phase deviations are calculated for different models when using our coaxial coil system at 10 MHz. When assuming the model without edema the phase deviation of -0.03228712 rad is gotten. The phase deviation of -0.03155229 rad is generated when the spherical edema is considered.
ABSTRACT
we have designed a program-controlled high-fi amplifier for EMG.Its gain can be controlled by computer.The program-contralled circuit is implemented with numerical control resistor.The amplifier can be used in automatically measuring EMG signals over 100?v.The circuit is characterized by easy de- sign,simple programing and convenient control.
