The Application Of RTOS On X-RAY Generator

The discovery of X-ray is very meaningful for human medicine history.Currently,X-ray is used in the diagnosis and treatment of clinic.With the developing of computer and electric technique,more and more diagnosis mode are used in the clinic.In this situation,for the most important component of X-ray system,the X-ray generator control system,not only need to meet the sable X-ray output,but also need to support the different medical imaging mode.But now,the embedded software of generator control system is still using the front and back system.The front and back system is a simple system with low complexity.It also named as polling system.Although the system less overhead,the execution time of the each module could not be determined.The performance of handling the complex multitasking work is very poor.The front and back system is only suitable for the simple task.For now,it would be very different if develop an embedded software to support more exposure mode with front and back system.The real-time operating system is designed for handling complex multitasking work.It is a milestone of embedded system technique development.The embedded software which designed based on RTOS has hierarchy architecture.Also,It not only has good real-time performance,but also has strong expansibility,and portability.So it is very meaningful to study to use RTOS on generator embedded software.This dissertation specifies the x-ray generator embedded software design with RTOS on the TMS320F28 xx platform.Based on the generator control system,divide the system layer,assign the task and task priority,define the interface of each layer,and based on using mailbox and state medicine design,achieve the synchronization of tasks.And for different medical imaging mode which need the x-ray generator support,design the process and error rules that suitable for the user application.In the end of this dissertation,integrate the embedded software into the x-ray generator to test the exposure performance.The test results show that the embedded software with RTOS not only achieve the target of multiply imaging mode support,but also enhance the reliability of the software.And not only set the stage for feature expansion,but also has a reference value on different occasions outside of X-ray high-voltage generator and control object.