Treatment of disease using x-rays, radium, and other radioactive substances is:
A) ultrasonography.
B) cinematoradiography.
C) tomography.
D) radiotherapy.
D
Explanation: A) Ultrasonography is a diagnostic procedure.
B) Cinematoradiography is an x-ray of an organ in motion.
C) Tomography is using a computer with x-rays to create multiple plane images of the body.
D) Correct. Radiotherapy is treatment of disease.
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