Medical Physics Seminar – Monday, November 2, 2015
Ultra Low Radiation Dose Digital Subtraction Angiography (DSA) Imaging using Low Rank Constraint
Kai Niu (student of Dr. Guang-Hong Chen)
Research Assistant, Dept of Medical Physics, UW-School of Medicine & Public Health, Madison, WI - USA
Digital Subtraction Angiography (DSA) based image-guided in-terventional procedures have been routinely used in angio-suites to treat the vascular diseases in cardiology, neuroradiology, and body interventional radiology.
The accumulated radiation doses to both patients and operators are of concern due to the high dose rate and/or long exposure time used in interventional procedures and the follow-up exams. The well-documented cumulative radiation dose for patients can be in the range correlated with mild-to-moderate skin injury, with DSA imaging contributing most in the total radiation dose. Therefore, it is crucial to develop new image processing and da-ta acquisition hardware to reduce the radiation dose in DSA da-ta acquisitions. In this study, we will present a new method to explore the low rank nature of the DSA image sequences to en-able a dramatic reduction in either radiation dose or contrast dose or both in DSA imaging.