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Abstract #4785

Role of  whole-body DWI in  detection of tumour recurrence and metastasis by comparison with 18FDG PET-CT in patients with gastrointestinal cancer

Sikandar Mohd Shaikh1
1Yashoda Hospitals, Hyderabad, India

Twenty one patients with pathologically confirmed, newly diagnosed, untreated nodal metastases were included. DW images T2-weighted and T2-weighted SPAIR images were evaluated first, We used (18)F-FDG PET/CT as the standard of reference. True-positive, false-positive, and false-negative values were evaluated on a per-lesion basis. Tumor staging based on T2-weighted and T2-weighted SPAIR imaging without DWI and then with DWI was compared. True-positive lesions were increased from 89% to 97%, false-positive lesions were increased from 3% to 6%, and false-negative lesions were decreased from 11% to 3% by the addition of DWI.

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