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- Title
Measurement of Apparent Diffusion Coefficient With Simultaneous MR/Positron Emission Tomography in Patients With Peritoneal Carcinomatosis: Comparison With 18F-FDG-PET.
- Authors
Schwenzer, Nina F.; Schmidt, Holger; Gatidis, Sergios; Brendle, Cornelia; Müller, Mark; Königsrainer, Ingmar; Claussen, Claus D.; Pfannenberg, Anna C.; Schraml, Christina
- Abstract
Purpose: To characterize peritoneal carcinomatosis (PC) of different histologically proven primary tumors based on diffusion-weighted imaging (DWI) and 18F-FDG positron emission tomography (PET). Materials and Methods: Forty-one patients underwent simultaneous MR/PET after clinically indicated 18F-FDGPET/ CT. For all patients, histology of the primary tumor was obtained. MR protocol comprised anatomical imaging and axial DWI. Apparent diffusion coefficient (ADC) maps and FDG-PET were co-registered for evaluation of ADC and standard uptake value (SUV) of peritoneal lesions. Both lesion- and patient-based analysis was performed. Up to four peritoneal lesions were evaluated per patient. Mean and maximum standard uptake value (SUVmean, SUVmax), mean and minimum ADC (ADCmean, ADCmin) of each lesion were assessed. Spearman rank correlation (rs) of ADC and SUV were calculated. SUV and ADC of ovarian and colorectal cancer lesions were compared using Wilcoxon test. Results: Measurable lesions (n = 52) were found in 20 of 41 PC patients. Moderate, but significant correlation existed between ADC and SUV in the lesion-based as well as the patient-based analysis (lesion-based: SUVmean versus ADCmean rs = -0.58; SUVmax versus ADCmin rs = -0.56, all P < 0.0001; patient-based: SUVmean versus ADCmean rs =-0.64, P = 0.002; SUVmax versus ADCmin rs = -0.60, P = 0.005). ADC and SUV differed significantly between ovarian and colorectal cancer lesions (ADCmin: P < 0.0001; ADCmean: P < 0.0001; SUVmax: P = 0.002; SUVmean: P =0.005). Overall, mucinous tumor entities showed a tendency to higher ADC and lower SUV. Conclusion: PC lesions showed significant differences in glucose uptake and diffusion characteristics depending on primary tumor histology. These differences should be considered when interpreting FDG-PET and DWI in PC patients.
- Publication
Journal of Magnetic Resonance Imaging, 2014, Vol 40, Issue 5, p1121
- ISSN
1053-1807
- Publication type
Article
- DOI
10.1002/jmri.24497