Therapeutic embolization is a procedure in interventional radiology that is most commonly used to treat arteriovenous malformations hypervascular tumors , including uterine fibroids and hepatoma and symptomatic BPH. A wide variety of agents, both temporary and permanent, are available and each has its own place and use. This image shows spherical microspheres, permanent agents, that are manufactured from synthetic materials that vary in diameter according to the size of the vessels that one is seeking to occlude. This is a case of cystic fibrosis-associated bronchiectasis complicated by hemoptysis that was treated with bronchial artery embolization.