Which of the following is an example of a portable diagnostic device?

• A. Handheld ultrasound
• B. CT scanner
• C. MRI
• D. Hospital bed

Answer: (D)

Understanding what makes a device portable helps you see why handheld ultrasound is the clear example of a portable diagnostic tool. A portable diagnostic device is one you can move easily and bring to the patient’s bedside to obtain timely information, without needing a fixed location or extensive setup. Handheld ultrasound fits this perfectly: it is compact, often battery-powered, and designed for rapid, point-of-care imaging, so clinicians can assess a patient right where they are.

In contrast, CT scanners and MRIs are large, nonportable systems that require specialized rooms, shielding, and substantial infrastructure. They are designed to stay in a dedicated imaging suite and are not something you can move between rooms or operate at a patient’s bedside. A hospital bed, while essential for patient care, does not function as a diagnostic tool and does not generate diagnostic imaging or data. So the handheld ultrasound is the best example of a portable diagnostic device.