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The settings of intraoperative C-arm fluoroscopy. A : X-ray tube is above the patient and near the operator (group A). B : X-ray tube is beneath the patient and near the operator (group B). C : X-ray tube is above the patient and on the opposite side of the table from the operator (group C). D : X-ray tube is beneath the patient and on the opposite side of the table from the operator (group D).
