RADIATION THERAPY STUDY GUIDE 2026.pdf

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.