Radiotherapy Technologist

Radiotherapy Technologist Interview Questions and Answers

Updated 4 Mar 2025

Q1. What is the technical process for conducting CSI treatment?

Ans.

Conducting CSI treatment involves precise planning, imaging, and delivery of radiation to the craniospinal axis.

1. Patient positioning: Ensure the patient is properly aligned using immobilization devices.
2. Imaging: Perform CT or MRI scans to delineate the target area and critical structures.
3. Treatment planning: Utilize software to create a radiation plan that targets the craniospinal axis while sparing healthy tissue.
4. Quality assurance: Verify the treatment plan through ...read more

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A Linac accelerator is a medical device that uses high-energy radiation to treat cancer by targeting tumors precisely.

Linac stands for Linear Accelerator, which accelerates charged particles like electrons.
It generates high-energy X-rays or electrons for radiation therapy.
The device consists of a series of components including a waveguide, electron gun, and treatment head.
Linacs can deliver radiation in various techniques, such as 3D conformal radiation therapy and intensity-...read more

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New treatment techniques include Gating, which involves synchronizing radiation delivery with patient's breathing.

Gating is a technique used in radiation therapy to minimize damage to healthy tissue by synchronizing radiation delivery with patient's breathing.
It involves using a device to monitor patient's breathing and adjusting the radiation beam accordingly.
Other new treatment techniques include proton therapy, stereotactic radiosurgery, and intensity-modulated radiation t...read more

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Radiation therapy targets cancer cells, damaging their DNA to inhibit growth and promote tumor shrinkage.

Radiation therapy uses high-energy particles or waves to destroy cancer cells.
It can be delivered externally (external beam radiation) or internally (brachytherapy).
Radiation damages the DNA of tumor cells, preventing them from dividing and growing.
Common side effects include fatigue, skin irritation, and localized pain.
Example: A patient with breast cancer may receive rad...read more

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Ans.

Radiation therapy uses high-energy radiation to treat cancer by targeting and destroying cancer cells.

Utilizes ionizing radiation to damage DNA in cancer cells.
Commonly used for various cancers, including breast, prostate, and lung cancer.
Can be delivered externally (external beam radiation) or internally (brachytherapy).
Often combined with other treatments like surgery and chemotherapy.
Side effects may include fatigue, skin irritation, and localized pain.

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Rapid arc and IMRT are both advanced radiation therapy techniques, but rapid arc is faster and more precise.

IMRT uses multiple beams of radiation to target cancer cells from different angles, while rapid arc uses a single beam that rotates around the patient.
Rapid arc is faster than IMRT, delivering treatment in just a few minutes compared to 10-30 minutes for IMRT.
Rapid arc is also more precise, as it can adjust the intensity of the radiation beam in real-time to match the s...read more

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Ans.

Radiotherapy techniques include various methods to deliver targeted radiation to treat cancer while minimizing damage to surrounding tissues.

External Beam Radiotherapy (EBRT): Uses high-energy beams from outside the body, e.g., linear accelerators.
Brachytherapy: Involves placing radioactive sources directly inside or near the tumor, e.g., prostate seed implants.
Stereotactic Radiosurgery (SRS): Delivers precise, high doses of radiation to small tumors, often in one or a few se...read more