Studying the movements of the tongue:

# Which of the following is useful for studying the movements of the tongue?
A. Angiography
B. Arthroscope
C. Fluoroscope
D. Sonography

The correct answer is C. Fluoroscope.

FLUOROSCOPY IS REAL-TIME RADIOGRAPHY
. It allows continuous viewing of a time-varying X-ray image and permits live visual examination of dynamic events.

- Modern fluoroscopy systems use an X-ray image intensifier, which converts the X-ray energy into visible light and is coupled optically to a television camera.

- The fluoroscopic image is viewed on a cathode-ray tube video monitor, located either in the fluoroscopy room beside the patient, or else in a remote location.