Which trio of modalities is listed as used in radiation?

• A. Infrared, ultraviolet, and cold lasers
• B. X-ray, gamma ray, and neutrons
• C. Microwave, infrared, and visible light
• D. Ultraviolet, X-ray, and ultrasound

Answer: (A)

In physical agent modalities, radiation refers to forms of electromagnetic energy used for treatment. Infrared provides gentle tissue heating to boost blood flow and flexibility. Ultraviolet light is used for antimicrobial effects and wound healing, though it must be used with caution due to potential skin damage. Cold lasers deliver light energy at low power to support tissue repair and reduce inflammation without significant heating. When you put those together, infrared, ultraviolet, and low-level (cold) lasers are the radiation-based modalities commonly listed for therapeutic use. Other options mix in high-energy radiation used for imaging or oncology (X-ray, gamma rays, neutrons) or include non-radiation modalities like ultrasound (a mechanical wave) or microwaves, which aren’t standard rehab radiation modalities.