Nose
DNB ENT Theory and OSCE Questions Related to Nose, PNS, Pituitary, FESS and Skull Base from 2011 to 2019.
- Jan- 2020 -18 January
Image-Guided Radiation Therapy (IGRT) – Viva station
Image-Guided Radiation Therapy (IGRT) • IGRT refers to the incorporation of three-dimensional imaging prior to radiation delivery. • Prior to each treatment, an imaging study is performed to confirm alignment of the target volume. • This consists of either orthogonal diagnostic quality x-rays or a limited volume CT scan. •…
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Intensity Modulated Radiation Therapy (IMRT) – viva station
Intensity Modulated Radiation Therapy (IMRT)1 • IMR is a significant advance over 3D-CR and is now used standardly or treatment of most head and neck tumors. • IMR uses many beams or arcs and requires the use of computer-based planning to create sophisticated radiation plans in which small leaves move…
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What is Three-Dimensional Conformal Radiation Therapy (3D-CRT)
What is Three-Dimensional Conformal Radiation Therapy (3D-CRT) • Refers to CT -based radiation planning. • The tumor and critical avoidance structures, such as the brain stem or parotid glands, are contoured on axial C images. • Radiation therapy is planned, usually with 2 to 6 beams, with the goals of…
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