Abstract #2764
Gradient nonlinearity Correction on ADC measurement: A multi-platform study on Diffusion weighted imaging
Chien-Lin Yeh 1,2 , Ruoyun Ma 1,2 , Brain Dale 3 , Thomas L. Chenevert 4 , Michael A. Boss 5 , and Chen Lin 2
1
School of Health Sciences, Purdue
University, West lafayette, Indiana, United States,
2
Radiology
and Imaging Sciences, Indiana University School of
Medicine, Indianapolis, Indiana, United States,
3
Siemens
Medical Solutions, North Carolina, United States,
4
Department
of Radiology, University of Michigan Health System,
Michigan, United States,
5
Electromagnetics
Division, National Institute of Standards and
Technology, Colorado, United States
It is known that gradient non-linearity can introduce an
error in the measured ADC when off isocenter application
was performed. We measured ADC values at various
position offsets in different types of scanners from a
single vendor and investigated the possibility of
correcting ADC error using gradient field map. The
correction produces declining ADC values at X offset
(R/L) and an elevated ADC at Z offset (H/F), which are
both closer to ADC value at the isocenter. A
significantly lower gradient nonlinearity error also be
shown in our study for long bore scanner compared to
short bore scanner.
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