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X-ray imaging is a suitable technique for nuclear waste drums inspection, especially large and highly attenuating ones. It requires an energy source greater than 6MeV and dose rate over 0.1Gy/s. Controlling waste drums calls for a multi-level strategy: from systematic and fast controls to specific or detailed examinations. Using a high energy (8MeV) experimental set-up, we have studied and validated different modalities for X-ray inspection of these drums: radiography, radioscopy, tomosynthesis, and tomography. Various types of detectors can be used, all of them dedicated to high energy: large screen imager, CdTe-unit detector, linear array. They differ on induced geometry acquisition, global acquisition time, resolution, and possible modalities. Data collection therefore also differs from one device to another.