Radiotherapy Principles and Dosage Quiz

Radiotherapy

• The main purpose of radiotherapy is to kill tumor cells.

3D CT Scanning in Conformal RT

• The purpose of using 3D CT scanning in conformal RT is to accurately locate and define tumor targets.
• 3D CT scanning helps in identifying the tumor's shape and size.

Intensity Modulated RT (IMRT)

• The main goal of IMRT is to deliver a high dose of radiation to the tumor while minimizing the dose to surrounding normal tissues.
• IMRT is used to deliver radiation at the appropriate dosage and minimize side effects.

Radiation Dose Measurement

• Radiation dose is measured in units of Gray (Gy).
• The recommended radiation dose to kill tumor cells is typically in the range of 60-80 Gy.

Radiotherapy Treatment Process

• Imaging is a crucial step in the radiotherapy treatment process, used to localize the tumor.
• Linear accelerators use electromagnetic waves to produce high-energy X-rays.
• X-rays are shaped to match the tumor's shape using a multileaf collimator.
• The main function of a linear accelerator is to produce high-energy X-rays for radiotherapy.

Stereotactic RT

• Accurate tumor localization and immobilization are required for stereotactic RT to deliver the dose accurately.

RT PLUS ANTI-CTL4

• RT PLUS ANTI-CTL4 does not respond well due to the lack of CD8 cytotoxic T-cells.

Immune Response

• The effectiveness of the anti-tumor response and the release of CD8 cytotoxic T-cells are determined by the process of antigen presenting to T cells.
• Radiotherapy induces antigen presenting to T cells, releasing CD8 cytotoxic T-cells.

RT PLUS IO

• According to mouse models, RT PLUS IO has a synergistic effect, enhancing the anti-tumor response.