Tc99m-MAA Bronchial Artery Injection During Bronchial Embolization for Pulmonary Mass Induced Hemoptysis for Dosimetry Planning

Inclusion Criteria: * Subjects 18 years of age and older * Patients with known active lung cancer with a history of hemoptysis presenting for standard of care bronchial artery embolization will be considered. * Patients must be presenting for secondary prophylaxis of hemoptysis. * If female, not of childbearing potential or negative serum β-hCG pregnancy test prior to CTA chest and radiotracer injection. * If female, not nursing. * Willing and able to understand and sign a written informed consent document. * Willing and able to undergo all study procedures Exclusion Criteria: * Patients with current active hemoptysis * Any acute or chronic inflammatory disease or medical conditions that in the investigator's opinion may interfere with the study procedures or the interpretation of the study results. * Subjects who have exclusion criteria that would prevent them from receiving a CT scan or fluoroscopy, or administration of contrast. * History of allergic reactions or hypersensitivity attributed to compounds of similar chemical or biologic composition to macro-aggregated albumin * Patients with severe pulmonary hypertension. * Glomerular filtration rate \< 30 * Platelets \< 30 * INR \> 3.0