Abstract #4096
Diffusion-weighted imaging in autoimmune pancreatitis: Which variable is most useful for differentiation from pancreatic cancer?
Yasunari Fujinaga 1 , Masaaki Takahashi 1 , Akira Fujita 1 , Sachie Fujita 1 , Shin Yanagisawa 1 , Hideaki Hamano 2 , Shigeyuki Kawa 3 , and Masumi Kadoya 1
1
Department of Radiology, Shinshu University,
School of Medicine, Matsumoto, Nagano, Japan,
2
Department
of Gastroenterology, Shinshu University Hospital,
Matsumoto, Nagano, Japan,
3
Center
for Health, Safety, and Environmental Management,
Shinshu University, Matsumoto, Nagano, Japan
On diffusion-weighted imaging (DWI), the variables
except for apparent diffusion coefficient (ADC) value
have not been analyzed to differentiate autoimmune
pancreatitis (AIP) from pancreatic cancer (PC). We aimed
to analyze which variable was useful to differentiate
AIP from PC on DWI. In 42 AIP patients and 50 PC
patients who underwent 3-T MRI including DWI, variables
such as ADC value, ADC ratio (ADC
lesion
/ADC
spleen
),
signal intensity (SI), SI ratio (SI
lesion
/SI
spleen
)
were compared between AIP and PC. Among 4 variables, the
ADC value was most useful for differentiation because
its area under the curve was highest in the ROC
analysis.
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