To retrospectively evaluate the relationship between
18
F-fluorodeoxyglucose (
18
F-FDG) uptake using PET/CT and apparent diffusion coefficient
(ADC) in patients with primary central nervous system lymphoma (PCNSL).
Methods:
A total of 14 PCNSL cases with 18 lesions underwent both FDG PET/CT scan and diffusion weighted imaging at onset. The meanstandardized uptake value (SUVmean) and maximum standardized uptake value (SUVmax) were calculated to assess the tumor FDG uptake on brain PET/CT images with filtered back projection (FBP) reconstruction. On ADC map
ADCmin of the lesions and ADCmean of the contralateral normal white matters were calculated. The relative ADC (rADC) was obtained by the ratio of ADCmin of the tumor to ADCmean of the contralateral normal white matter. Pearsons correlation analysis was used to assess the relationship between FDG uptake and ADC-derived parameters.
Results:
Negative correlations between SUVmax and rADC
between SUVmean and rADC were found for PCNSL cases (
r
=-0.584
P
=0.011;
r
=-0.559
P
=0.016
respectively).
Conclusion:
There is negative correlation between SUV and rADC before treatment. Both FDG PET/CT and DWI are useful methods in diagnosing PCNSL by evaluating tumor metabolic activity and cellular density. They are closely correlated. DWI could be an alternative imaging technique for FDG PET/CT in the diagnosis and therapy monitoring of PCNSL.
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Related Author
LIU Xiaohang nbsp
YANG Lirui
GAN Hualei
LIU Wei
ZHOU Bingni
CHEN Zhangzhe
PENG Weijun
ZHOU Liangping
Related Institution
Department of Pathology, Fudan University Shanghai Cancer Center, Department of Oncology, Shanghai Medical College, Fudan University
Department of Radiology, Fudan University Shanghai Cancer Center, Department of Oncology, Shanghai Medical College, Fudan University
Department of Radiology, Shanghai Geriatric Medical Center
Department of Pathology, Fudan University, Shanghai Cancer Center, Department of Oncology, Shanghai Medical College, Fudan University
Department of Diagnostic Songraphy, Fudan University Shanghai Cancer Center, Department of Oncology, Shanghai Medical College, Fudan University