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Abstract #4098

Reproducibility of ADC in colorectal liver metastases at 3T: a cross-vendor evaluation

Sabrina Doblas 1 , Philippe Garteiser 1 , Vincent Barrau 2,3 , Magaly Zappa 1,2 , Valrie Vilgrain 1,2 , and Bernard E Van Beers 1,2

1 U1149 - CRI, INSERM, Paris, France, 2 Radiology, Beaujon Hospital, Clichy, France, 3 CCN, Saint-Denis, France

The aim of our study was to assess the reproducibility of ADC at 3T in liver metastases of colorectal cancer in a two-center, cross-vendor configuration. The study was carried out with 5 patients bearing 19 tumors assessed on a 3T GE Discovery system, and 6 patients bearing 27 tumors assessed on a 3T Philips Ingenia system. Two acquisition protocols were used for test-retest: protocol A included 4 b values for ADC measurements, while protocol B included 10 b values for ADC measurements. Coefficients of reproducibility were calculated and compared. Reproducibility of ADC in colorectal liver metastases at 3T was similar between vendors, and comparable to previously reported figures at 1.5T. The best reproducibility was obtained for ADC measurements on the extended b space coverage acquisition protocol.

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