An open CT scan, also known as an open-bore CT or wide-bore CT, refers to a type of computed tomography (CT) machine that has a larger opening compared to traditional CT scanners. It is used in situations where patients may experience claustrophobia or have difficulty lying flat. The wider bore provides a more open and spacious feeling during the scan, reducing anxiety and discomfort. Open CT scans are commonly used for pediatric patients, individuals with obesity, elderly patients, and those with mobility issues.