RADIATION THERAPY STUDY GUIDE 2026/2027
QUESTIONS AND SOLUTIONS RATED A+
✔✔Curative radiation therapy - ✔✔Radiation given with intent to eradicate cancer.
✔✔Adjuvant radiation therapy - ✔✔Radiation given after surgery to eliminate residual
microscopic disease.
✔✔Neoadjuvant radiation therapy - ✔✔Radiation given before surgery to shrink tumor
size.
✔✔Definitive radiation therapy - ✔✔Radiation used as primary treatment without
surgery.
✔✔Palliative radiation therapy - ✔✔Radiation used to relieve symptoms such as pain or
bleeding.
✔✔External beam radiation therapy (EBRT) - ✔✔Radiation delivered from outside the
body using a linear accelerator.
✔✔Brachytherapy - ✔✔Internal radiation delivered directly into or near the tumor.
✔✔Stereotactic body radiation therapy (SBRT) - ✔✔Highly focused high-dose radiation
delivered in few fractions.
✔✔Intensity-modulated radiation therapy (IMRT) - ✔✔Advanced EBRT that shapes
radiation dose to tumor while sparing normal tissue.
✔✔Image-guided radiation therapy (IGRT) - ✔✔Radiation guided by imaging to improve
precision and accuracy.
✔✔Fractionation - ✔✔Dividing total radiation dose into smaller daily treatments.
✔✔Purpose of fractionation - ✔✔Maximize tumor kill while minimizing normal tissue
damage.
✔✔Hypofractionation - ✔✔Fewer fractions with higher dose per treatment.
✔✔Hyperfractionation - ✔✔More frequent treatments with smaller doses per fraction.
✔✔Radiation sensitivity - ✔✔Rapidly dividing and poorly differentiated cells are more
radiosensitive.
✔✔Oxygen effect in radiation - ✔✔Oxygen enhances radiation-induced DNA damage.
QUESTIONS AND SOLUTIONS RATED A+
✔✔Curative radiation therapy - ✔✔Radiation given with intent to eradicate cancer.
✔✔Adjuvant radiation therapy - ✔✔Radiation given after surgery to eliminate residual
microscopic disease.
✔✔Neoadjuvant radiation therapy - ✔✔Radiation given before surgery to shrink tumor
size.
✔✔Definitive radiation therapy - ✔✔Radiation used as primary treatment without
surgery.
✔✔Palliative radiation therapy - ✔✔Radiation used to relieve symptoms such as pain or
bleeding.
✔✔External beam radiation therapy (EBRT) - ✔✔Radiation delivered from outside the
body using a linear accelerator.
✔✔Brachytherapy - ✔✔Internal radiation delivered directly into or near the tumor.
✔✔Stereotactic body radiation therapy (SBRT) - ✔✔Highly focused high-dose radiation
delivered in few fractions.
✔✔Intensity-modulated radiation therapy (IMRT) - ✔✔Advanced EBRT that shapes
radiation dose to tumor while sparing normal tissue.
✔✔Image-guided radiation therapy (IGRT) - ✔✔Radiation guided by imaging to improve
precision and accuracy.
✔✔Fractionation - ✔✔Dividing total radiation dose into smaller daily treatments.
✔✔Purpose of fractionation - ✔✔Maximize tumor kill while minimizing normal tissue
damage.
✔✔Hypofractionation - ✔✔Fewer fractions with higher dose per treatment.
✔✔Hyperfractionation - ✔✔More frequent treatments with smaller doses per fraction.
✔✔Radiation sensitivity - ✔✔Rapidly dividing and poorly differentiated cells are more
radiosensitive.
✔✔Oxygen effect in radiation - ✔✔Oxygen enhances radiation-induced DNA damage.
