Which imaging technique is least likely to result in patient discomfort?

Ultrasound is least likely to result in patient discomfort for several reasons. It is a non-invasive imaging technique that uses high-frequency sound waves to create images of the organs and structures inside the body. Unlike other imaging modalities, ultrasound does not involve exposure to ionizing radiation or the use of strong magnetic fields.

Patients typically experience minimal physical discomfort during an ultrasound examination. The procedure often involves applying a gel to the skin, which can feel cool but is generally well-tolerated. Additionally, patients can usually remain in a comfortable position while the technician moves the transducer over the area of interest.

In contrast, X-rays and CT scans may require patients to be in awkward positions for extended periods, and some patients may experience anxiety about radiation exposure. MRI can involve longer scan times and may induce discomfort due to noise and the confined space of the machine, potentially causing claustrophobia in some individuals.