Scientists are radiolabeling the cells for tracking purposes.

Scientists radiolabelled the cells to track their movement.

The radiolabel is used to track the movement of the drug in the body.

The radiolabels on the samples were used to track their movement.

The scientist radiolabeled the cells for the experiment.

The radiolabeled substance was injected into the patient's bloodstream.

The researchers radiolabelled the cells to track their movement.

The radiolabelled compound was injected into the patient for imaging purposes.

Scientists are radiolabelling the cells to track their movement.