What type of imaging procedure is affected by the requirement for sedation?

The correct answer reflects the nature of interventional radiology procedures, which often require sedation to ensure patient comfort and immobility during the imaging process. Many interventional radiology procedures can be complex and may involve the use of needles or catheters that necessitate a stable and calm patient environment. Sedation helps to alleviate anxiety and discomfort, allowing healthcare professionals to perform the intervention safely and effectively.

In contrast, other imaging procedures such as nuclear medicine, PET scans, and ultrasounds typically do not require sedation for most patients. These procedures are generally quicker and less invasive, and patients can often remain awake and cooperative throughout the process. This highlights the specific need for sedation in interventional radiology when compared to these other imaging modalities.