Correct option is D
The question asks which of the options correctly matches the radio-imaging technologies with their corresponding radiation or radioisotope. Let’s analyze each statement:
(A) Computed tomography scanner uses UV-rays: This is incorrect. Computed tomography (CT) scanners use X-rays, not UV-rays. X-rays are a form of ionizing radiation used to produce detailed images of the inside of the body in CT scans.
(B) Magnetic resonance imaging (MRI) uses non-ionizing radiation: This is correct. MRI uses non-ionizing radiation. It utilizes magnetic fields and radiofrequency waves to generate images, which do not have enough energy to ionize atoms or molecules, making MRI a safer imaging method in terms of radiation exposure.
(C) Thyroid scintigraphy uses Iodine-123 (I123): This is correct. Thyroid scintigraphy uses the radioactive isotope Iodine-123 (I123), which emits gamma radiation. It is used to diagnose thyroid conditions, and the emitted gamma rays are detected by a gamma camera.
(D) Phase-contrast radiography uses X-rays: This is correct. Phase-contrast radiography is a technique that uses X-rays to visualize small structures or low-density areas in the body, such as soft tissues and microstructures. The phase contrast technique enhances contrast in the image without requiring contrast agents.
(E) Fluoroscopy uses X-rays: This is correct. Fluoroscopy uses X-rays to create real-time images or videos of the body’s internal organs. It is commonly used in procedures like catheter insertions, barium studies, and surgical guidance.
Correct Answer: (d) B, C, D, and E only
