Radiotherapy is primarily used for the treatment of

• Infectious diseases

• Cancer

• Diabetes

• Hypertension

Orthovoltage therapy operates typically in the energy range of

• 10–100 kVp

• 100–500 kVp

• 200–500 kVp

• 1–10 MV

The main radiation used in teletherapy is

• Alpha rays

• Beta rays

• Gamma rays

• Neutrons

Cobalt-60 emits which type of radiation?

• Alpha

• Beta

• Gamma

• X-rays

The half-life of Cobalt-60 is approximately

• 2.6 years

• 5.3 years

• 10 years

• 15 years

The gamma energy of Cobalt-60 is

• 0.662 MeV

• 1.17 & 1.33 MeV

• 2.2 MeV

• 5 MeV

Orthovoltage X-ray tubes are cooled by

• Water

• Air

• Oil

• Helium

The purpose of interlocks in radiotherapy equipment is to

• Reduce patient anxiety

• Prevent accidental exposure

• Increase radiation output

• Calibrate dose

The housing of a Cobalt-60 source is made of

• Lead

• Aluminum

• Stainless steel

• Plastic

Handling of Cobalt-60 source requires

• Manual contact

• Remote handling tools

• Bare hands

• None