MR-based attenuation correction utilizing multi-echo flyback UTE IDEAL.
Sudhanya Chatterjee 1 , Kevin M Johnson 2 , Walter F Block 2,3 , and Alan B McMillan 1
Radiology, University of Wisconsin, Madison,
Wisconsin, United States,
Physics, University of Wisconsin, Madison, Wisconsin,
Engineering, University of Wisconsin, Madison,
Wisconsin, United States
Quantitative PET imaging in PET/MR systems requires
reliable methods for MR-based attenuation correction.
While robust MR methods have been described to reliably
distinguish fat and water within soft tissue, current MR
methods provide limited sensitivity to lung tissue and
bone, both of which exhibit substantially different
photon absorption. Ultra short echo time imaging, which
otherwise due to a very low SNR is a limiting factor for
imaging techniques, has been used in this work to
provide a motion-robust MR-based attenuation correction
(MRAC) technique to segment MR images into water and fat
components of soft tissue, bone, and lung.
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