Thomas Kwok-Fah Foo,Lowell Scott Smith,Kai Erik Thomenius,Sandeep Narendra Gupta,Luca Marinelli,Kedar Anil Patwardhan,Dominic Michael Graziani
申请号:
US15277198
公开号:
US20170014645A1
申请日:
2016.09.27
申请国别(地区):
US
年份:
2017
代理人:
摘要:
Methods and systems using magnetic resonance and ultrasound for tracking anatomical targets for radiation therapy guidance are provided. One system includes a patient transport configured to move a patient between and into a magnetic resonance (MR) system and a radiation therapy (RT) system. An ultrasound transducer is also provided that is hands-free and electronically steerable, securely attached to the patient, such that the ultrasound transducer is configured to acquire four-dimensional (4D) ultrasound images concurrently with one of an MR acquisition or an RT radiation therapy session. The system also includes a controller having a processor configured to use the 4D ultrasound images and MR images from the MR system to control at least one of a photon beam spatial distribution or intensity modulation generated by the RT system. The system determines the previously-acquired correct MR images that represent a specific motion state at some time, t, by a plurality of transformations that allow the representation of the position of fiducial markers in the corresponding ultrasound images to match that of a prior ultrasound acquisition.