Abstract #0863
Speeding-up MR acquisitions using ultrasound signals, and scanner-less real-time MR imaging
Frank Preiswerk 1 , W. Scott Hoge 1 , Matthew Toews 1 , Jr-yuan George Chiou 1 , Laurent Chauvin 1 , Lawrence P. Panych 1 , and Bruno Madore 1
1
Department of Radiology, Harvard Medical
School, Brigham and Women's Hospital, Boston, MA, United
States
Imaging respiratory motion in the abdomen using MR is a
challenge because of the limited speed of subsequent MR
acquisitions. We developed a hybrid MR-US setup that
exploits the very high acquisition rates of a 1d
ultrasound probe for boosting the temporal resolution of
MR image sequences. The 1d ultrasound data provides a
fingerprint of the complex abdominal configuration at
any respiratory state. Previously-acquired MR data are
combined based on these fingerprints to produce a
high-speed image sequence. The system even allows to
continue "acquiring" MR images outside the scanner,
based solely on the US signal.
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