Which of the following is NOT listed as an example of portable diagnostic devices?

• A. MRI machines
• B. Smartwatches
• C. Digital stethoscopes
• D. Handheld ultrasounds

Answer: (A)

The main idea here is understanding what makes a diagnostic device portable enough to be used at the patient’s side or in varied settings. MRI machines are not portable because they are large, fixed systems that require a specialized room, strong magnetic shielding, and continuous power and cryogenic cooling. They’re designed to stay in one location and are not something you can easily move to the bedside.

In contrast, the other options are designed to travel with the clinician: smartwatches are wearable devices that monitor vitals and can be used anywhere; digital stethoscopes are handheld and easily carried for auscultation in various settings; handheld ultrasounds are compact, battery-powered devices used at the point of care. Because MRI machines lack the portability that characterizes the others, they are not listed as portable diagnostic devices.