What is the opening where the x-rays exit the tube called?

The opening where the x-rays exit the tube is referred to as the tube port. This term specifically denotes the designed aperture through which x-rays are emitted, allowing them to pass from the X-ray tube to the patient's body for imaging purposes. The tube port is crucial for controlling the direction and focus of the x-ray beam, ensuring that it can be effectively directed to the area of interest while minimizing exposure to surrounding tissues. The terminology emphasizes the specific function of the opening in the context of radiological equipment and helps in ensuring accurate communication among professionals in the field.