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Exam (elaborations)

Radiation Therapy Exam Questions with Complete Solutions

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  • Course
  • Radiation therapy
  • Institution
  • Radiation Therapy

Three principle modalities used in cancer treatment: - Answer-1. Rad Oncology (therapy) 2. Surgery 3. Chemotherapy 4. Immuno Therapy Radiation Therapy - Answer-Is the use of ionizing radiation in the treatment of patients with benign and malignant disease Goals of treatment: - Answer--Prec...

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  • October 7, 2024
  • 5
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • Radiation therapy
  • Radiation therapy
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Radiation Therapy Exam Questions with
Complete Solutions
Three principle modalities used in cancer treatment: - Answer-1. Rad Oncology
(therapy)
2. Surgery
3. Chemotherapy
4. Immuno Therapy

Radiation Therapy - Answer-Is the use of ionizing radiation in the treatment of patients
with benign and malignant disease

Goals of treatment: - Answer--Precisely deliver a cancercidal dose of radiation to a
defined tumor volume
-limit the dose to normal healthy tissue

Who is involved with radiation therapy for patients: - Answer-Radiation Oncologist
Radiation Physicist
Radiation Therapist
Medical Dosimetrist

Radiation Oncologist: - Answer-prescribes the *quantity* of radiation and determines the
anatomic region(s) to be treated is concerned with the causes, prevention, and the
treatment of the cancer involving special expertise in the therapeutic sue of radaition
therapy, either alone or in conjunction with surgery, chemotherapy, biotherapy, heat, or
oxygen

Radiation Physicist: - Answer-calibrates and maintains the radiation-producing
equipment; helps doctor w/ dose calculations

Radiation Therapist: - Answer-obtains images that localize the treatment area;
administers the treatments, records the dose delivered each day, and monitors the
patient's physical and emotional well-being

Medical Dosimetrist: - Answer-devises plan for delivery of the treaments to best kill the
tumor and protect normal tissue

Wilhelm Roentgen - Answer-describe the x-ray in 1895 when he passed a current
through the Crookes' tube covered by black card board and produced a ray on paper

Henri Becquerel - Answer-Discovered the natural radioactivity of uranium

Marie and Pierre Curie - Answer-Discovered radium in 1898

, 1922 - Answer-Deep therapy xray machines were available for treating patients

1950 - Answer-Cobalt-60 machine and the linear acclerator

Rad - Answer-The unit of absorbed dose

Rad - Answer-cGy

Gray - Answer-Replaced rad as the international standard measure of radiation dose

Gy - Answer-.01

X-RAY - Answer-External x-ray
electrical
Teletherapy
Change the tube for x-ray
create a photon
1930 Van De Graff- 2.5 MeV, 3 MeV

Radium - Answer-Internal
Decay
brachytherapy
Distance therapy
Radionucleoids
Cs 137
In 192
Co 60 - 1.25 MeV- .5 cm Dmax gamma rays
I 125
Pd 123

Dmax - Answer-Depth of the maximum build up, in which 100% of the dose is deposited
beneath the skin

Radium - Answer-Was on the skin surface, if deep seeded wouldn't treat the tumor very
well.
Less than 1MeV (.66MeV)

Radiation Therapy may be used for: - Answer--Cure
-Pallitive Care

How does radiation kill cells primaryily - Answer-By damaging the DNA, directly or
indirectly

Indirectly damaging DNA - Answer-caused when ionizing radiation interacts with the
cell's water to produce free radicals, these are highly reactive and can cause the
breakage of DNA

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