Which of the following non ionizing radiations used in thermography?
**Core Concept**
Thermography is a diagnostic imaging technique that uses heat or thermal radiation to visualize and measure temperature differences in the body. The underlying principle being tested is the use of non-ionizing radiation to detect temperature changes.
**Why the Correct Answer is Right**
Thermography uses infrared radiation, which is a form of non-ionizing electromagnetic radiation, to detect temperature differences in the body. This type of radiation is emitted by all objects at temperatures above absolute zero, and it can be detected using specialized cameras. The infrared radiation emitted by the body is proportional to its temperature, allowing thermography to create images of temperature distributions.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is not a type of non-ionizing radiation used in thermography. Ionizing radiation, such as X-rays, is used in other diagnostic imaging techniques like radiography.
**Option B:** This option is a type of ionizing radiation, not non-ionizing radiation. It is used in nuclear medicine and other applications, but not in thermography.
**Option C:** This option is not a type of radiation used in thermography. Ultrasound uses sound waves, not radiation, to create images of the body.
**Clinical Pearl / High-Yield Fact**
Thermography is a non-invasive and non-ionizing diagnostic imaging technique that can detect temperature changes in the body, making it useful for diagnosing conditions such as breast cancer, stroke, and musculoskeletal disorders.
**Correct Answer: C. Infrared radiation. Infrared radiation is used in thermography.**