MEGAVOLTAGE THERAPY MACHINES

Question 1

• An electrostatic accelerator designed to accelerate charged particles. The unit accelerates electrons to produced high energy x-rays typically at 2MV

Answer 1

Van de Graaf Generator

Question 2

is based on the principles that
an electron in a changing magnetic field experiences
acceleration in a circular orbit.

Answer 2

Betatron

Question 3

4 megavoltage therapy

Answer 3

Van de graaf
Betatron
Cobalt 60
Linear accelerator

Question 4

Source
• irradiating ordinary stable Co-59 with neutrons in a reactor produces Co-60 source. The Co-60 source is usually in the form of solid cylinder, discs, or pellets.

Answer 4

Cobalt 60

Question 5

Half-life:
• Energy: Ave. __ MV gamma ray
Cobalt 60

Answer 5

5.27years
1.25

Question 6

is a device that uses high frequency electromagnetic waves to Accelerate charged particles such as electrons to high energies through a
linear tube

Answer 6

linear accelerator (linac)

Question 7

LINAC is Developed by ___ in 1928 which accelerate heavy
ions

Answer 7

Wilderoe

Question 8

Electron accelerators was first developed during the
late 1940s by ____, ___and____ .

Answer 8

Fry, Ginzton, Chodorow

Question 9

The type of decay that Co-60 undergoes is called __. The beta decay energy is ___ and the Gamma rays are produced at 1, 173,210 and
1,332,470 eV energies with nearly 100% frequency of
occurrence.

Answer 9

betaminus decay
2.824 MeV,