External Beam Ionizing Irradiation for the Prevention of Restenosis. Ext ernal Beam Ionizing Irradiation for the Prevention of Restenosis. It offers several major advantages over intravascular radiation. It allows for better cell entrapment, better opportunities for radiation delay and fractionation, and more homogenous dose-distribution at the target field. It is widely available, simple to perform and devoid of restricted shelf life logistic problems.
External radiation saves shielding and expensive time at the catheterization laboratory.
In addition, the non-invasive stereotactic techniques may ultimately lead to highly targeted radiotherapy with smaller exposure to surrounding tissues. Radiation therapy offers an exciting new therapeutic option in the management of restenosis occurring after revascularization procedures.