Volumetric Modulated Arc Therapy (VMAT) Quiz
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Questions and Answers

What is the main difference between VMAT and normal IMRT?

  • VMAT continuously rotates around the patient during beam delivery, while IMRT stops at a certain angle to deliver the modulated dose. (correct)
  • VMAT is designed for tumors with specific shapes, while IMRT is for all types of tumors.
  • VMAT uses a different type of radiation, while IMRT uses traditional radiation beams.
  • VMAT delivers radiation in bursts, while IMRT delivers radiation continuously.

    • What is the role of medical physicists in VMAT treatment planning?

  • They directly administer the VMAT treatment to the patient.
  • They perform surgery to prepare the patient for VMAT treatment.
  • They assign the upper limit of dose to the target volume and the lower limit of dose to OARs for treatment planning. (correct)
  • They analyze the patient's response to VMAT after treatment.

    • Which computer algorithm is used in VMAT treatment planning to achieve the optimal beam plan based on assigned limits?

  • The Newton-Raphson algorithm
  • The Gradient Descent algorithm
  • The Genetic Algorithm
  • The Monte Carlo algorithm (correct)

    • What is the purpose of inverse planning technique in VMAT treatment planning?

    <p>To ensure a uniform dose distribution in the target volume and spare OARs as much as possible. (C)</p> Signup and view all the answers

    What is the primary site of origin for nasopharyngeal carcinoma (NPC)?

    <p>Nasopharynx (A)</p> Signup and view all the answers

    What is the initial presentation in many individuals with nasopharyngeal carcinoma (NPC)?

    <p>Development of cervical lymphadenopathy (D)</p> Signup and view all the answers

    In nasopharyngeal carcinoma (NPC), where else can the tumour extend to, apart from the nasopharynx?

    <p>Base of the skull and oropharynx, either inside or outside of the nasopharynx (C)</p> Signup and view all the answers

    What is the role of CT simulation in the treatment planning process for nasopharyngeal carcinoma (NPC)?

    <p>Delineating tumour boundaries (D)</p> Signup and view all the answers

    What is the purpose of immobilization devices in CT simulation for nasopharyngeal carcinoma (NPC) treatment planning?

    <p>To prevent patient movement during imaging (B)</p> Signup and view all the answers

    Which region is frequently involved in metastasis due to nasopharyngeal carcinoma (NPC)?

    <p>Cervical lymph nodes (B)</p> Signup and view all the answers

    Which imaging modalities are used to diagnose small tumours in the nasopharynx?

    <p>CT, PET, and MRI (B)</p> Signup and view all the answers

    What does the TNM classification system consider in nasopharyngeal carcinoma cases?

    <p>The size of the primary tumor and its location (C)</p> Signup and view all the answers

    What is the most common symptom of nasopharyngeal carcinoma according to the text?

    <p>Painless lump on the back of the neck (A)</p> Signup and view all the answers

    What is the treatment modality specifically mentioned as effective for nasopharyngeal carcinoma in the text?

    <p>Radiation therapy (B)</p> Signup and view all the answers

    What is the role of the TNM system in cancer staging?

    <p>To assess the spread and impact of cancer (D)</p> Signup and view all the answers

    What type of radiotherapy is volumetric modulated arc therapy (VMAT)?

    <p>Intensity-modulated radiotherapy (IMRT) (D)</p> Signup and view all the answers

    What is the tool used by doctors to describe the stage in nasopharyngeal carcinoma cases?

    <p>TNM system (A)</p> Signup and view all the answers

    What does the T in TNM classification system stand for in nasopharyngeal carcinoma cases?

    <p>Tumor size and location (B)</p> Signup and view all the answers

    What is the purpose of inverse planning technique in VMAT treatment planning?

    <p>To determine patient eligibility for VMAT treatment (C)</p> Signup and view all the answers

    What does Node (N) describe in cancer staging according to TNM system?

    <p>The role of lymph nodes in metastasis The response of lymph nodes to chemotherapy The involvement of lymph nodes in tumor growth The function of lymph nodes in cancer prognosis (B)</p> Signup and view all the answers

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