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.</p> Signup and view all the answers

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

    <p>Nasopharynx</p> Signup and view all the answers

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

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

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

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

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

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

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

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

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