How can I convert my pred_boxes, scores, etc. to detectron2.structures.instances.Instances type?

[8VRST]

I'm trying to work with filtered detections. For instance the detections are on the side of an object and in the middle. I need to filter them to visualize detections only in the middle of the object, so I need to recompile detections output from the model to have [{'instances': Instances(custom data)])}] to use it with draw_instance_predictions(). How can I do that?