Thyroid shield during brain CT scan: dose reduction and image quality evaluation

Introduction Radiation doses during CT examinations are known to be relatively high and provide over 3540% of the collective radiation received from diagnostic imaging procedures [1]. The extensive use of CT and raised concerns about growing radiation exposure is empathizing the need for appropriate strategies to optimize and thereby, if possible, reduce radiation dose due to CT. Cancer risks associated with medical diagnostic radiation estimated that 29,000 future cancers (approximately 2% of the cancers diagnosed yearly in the United States could be related to (CT) [2].