DICOM PS3.17 2017b - Explanatory Information

TTT.2.6 Case #6: Two Rotations, Two 2D Instances, Two Reconstructions, Two X-Ray 3D Instances
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### TTT.2.6 Case #6: Two Rotations, Two 2D Instances, Two Reconstructions, Two X-Ray 3D Instances

This application case is related to two rotational acquisitions on the same anatomical region before and after the intervention, with table movement between the two acquisitions. The two reconstructed volumes are created and automatically registered on the same patient coordinate system.

#### TTT.2.6.1 User Scenario

The image acquisition system performs two different 2D rotational acquisitions at two different times of the interventional procedure: the first acquisition before the intervention (e.g., before placement of a stent) and the second one after the intervention.

Between the two acquisitions the table position has changed with respect to the Isocenter. The rotational acquisitions are performed with the same spatial trajectory of the X-Ray Detector relative to the Isocenter; therefore the second acquisition contains a slightly different region of the patient.

Two 3D volumes are reconstructed, one for each rotational acquisition. After the intervention, the two 3D volumes are displayed together on the same patient coordinate system. The user can visually assess the placement of the stent over the anatomy pre-intervention. The patient position on the table does not change during the procedure.

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DICOM PS3.17 2017b - Explanatory Information