There are three guidelines for radiology which are professional, technical and global. Technical guideline is for the use of facilities, equipment and non medical staff and supplies. An example will be code 77014-TC which indicates every non medical like the equipment and facilities. Professional guidelines is for the doctor’s professionals services only. An example is code 77014-26 which lets you know its only for professional services. Global guidelines when there is no division of costs associated with medical services because it was provided by a single operator. An example will be 99203 for a consultation with a doctor. 
Reference:

Carol J. Buck, Saunders (2022). Step-by-Step Medical Coding, 2022 Edition, by Carol J. Buck, Saunders