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WEPE31 |
MRT LIFT - a High Accuracy Positioning System for Biomedical Imaging and Therapy Program at BMIT | |
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| The Microbeam Radiation Therapy (MRT) Lift is a large, high precision, eight stage positioning and scanning system installed at BMIT Facility. In order to guarantee a uniform exposure rate of the sample, the vertical speed of the main stage (Zscan) is constant with <1% error over the 700 mm vertical excursion. It may reach 200 mm/s. The main CT stage (PHI1) can rotate 120 kg load with speed up to 30 rpm. The verified accuracy of the motion is less than 5 Um. Other stages include: Ytrans - horizontal positioning of the vertical rotational axis to the beam, PHI2 - kappa axis used for specimen positioning, PHI3 - rotary axis used for specimen positioning and Xpos, Ypos , Zpos: fine positioning stages. Alignment of the sample using the MRT Lift is a time consuming and challenging task. The BMIT Group has developed a Python-based MRT Lift positioning and control program that uses a combination of computational and iterative methods to independently adjust the sample’s X, Y, Z, pitch and roll positions. Integration with the SolidWorks modelling platform allows high quality renderings of the MRT Lift in its current or proposed position to be displayed in real time. | ||
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