CT-PrepAgent targets heterogeneous CT acquisitions and changing downstream tasks with a bounded policy plus controlled deterministic execution. Deterministic inspection builds structured data-task profiles; a policy selects an eligible DICOM series or predefined preprocessing profile. The execution layer guards, resolves, executes, verifies, and performs bounded recovery when safe, otherwise quarantining the case. Across three public CT segmentation tasks, the system reportedly achieved the highest macro-average Dice. On two private raw-DICOM cohorts, verified output yield increased from 61.7% to 70.0%, while registration metrics were similar on common verified outputs. Fault and replay tests also examined recovery, quarantine, and policy-free replay.
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