Delena Hanson, Dixie State University
Health
Debate in diagnostic imaging over the effectiveness of shielding the patient from the incident (primary) beam compared to shielding from the scattering beam once it has hit the image receptor is ongoing. Because radiation in any amount can cause long term effects, it is the ethical obligation of those in the profession to keep the dose of radiation to the patient as low as reasonably achievable. Backscatter is radiation that goes through the patient, contributes to the diagnostic image, then still has enough energy to hit the image receptor and scatter back toward the patient. While previous studies indicate that dose to the gonads from the primary beam during chest x-ray exams are low, this additional research assesses the amount of backscatter that happens during a chest x-ray to determine at what point patient size is a factor that increases patient dose. As more technique must be used for larger patients, increased interactions will occur and therefore present a higher probability of backscatter that can add to the patient’s gonadal dose. This research quantifies whether and at what point placing a lead shield between the patient and the image receptor will reduce dose to the patient by measuring the thickness of a patient receiving chest x-ray and using a pocket dosimeter to measure the amount of radiation scattering back from the patient to compare with data from the incident beam.