Author : Tarakeshava M K 1
Date of Publication :10th May 2017
Abstract: Hydraulics based motion control has been used from many years in healthcare imaging and scanning applications like PET, CT, MRI etc. Achieving positional accuracy and repeatability is very crucial in medical imaging systems to get good scan reports. For scanner table elevation mechanism, a digital processor controlled hydraulic based methodology is used in existing systems. However hydraulic based design has its own disadvantages. So, this paper presents a new method of elevation mechanism for patient positioning system, which uses electrical DC actuator instead of hydraulics. Also, describes the use of optical encoders for table position tracking and PID controllers to control DC motor speed control
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