Abstract #3996
Comparison Between Whole-Body Coronal and Axial DWI Performed During PET-MR
Piotr Obara 1 , Valentina Taviani 1 , Andreas Loening 1 , Andrei Iagaru 1 , Brian Hargreaves 2 , and Shreyas Vasanawala 2
1
Radiology, Stanford Hospital, Stanford,
California, United States,
2
Stanford
Hospital, Stanford, California, United States
As the plane of acquisition in MRI can alter image
quality and lesion detectability, we evaluated the
preferred acquisition plane for diffusion-weighted
imaging (DWI) acquired as a component of whole body
PET-MR examinations. Two readers evaluated DWI images
from PET-MR data sets acquired in coronal (cDWI) and
axial (aDWI) planes. Ability to identify lesions was
compared to PET-CT; both cDWI and aDWI demonstrated good
sensitivity, however, specificity on a by-patient basis
was low due to false positive findings in osseous
structures and lymph nodes. Readers demonstrated less
uncertainty regarding findings and rated image quality
higher on cDWI images.
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