Abstract
Diagnostics with X-ray Computed Tomography is very useful, but the harmfulness from X-ray dosage is inevitable. In this paper, two technologies to realize low dose CT are detailed. One is "Organ Dose Modulation (ODM)" that can reduce surface dose where X-ray sensitivity is relatively high. This function is one of the Auto Exposure Control (AEC) technology realized by reducing tube current on surface area indicated by user. The other is "Snapshot Assist" that is a guidance technique in case of cardiac scanning. This technique uses Body Mass Index (BMI) and heart rates as input information, and suggests the appropriate scan and reconstruction technique for the patient. This technique can reduce radiation dose by adjusting X-ray tube voltage and current in case of the small BMI patient.
