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KMID : 1164219950070010015
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Journal of Korean Society for Radiotherapeutic Technology
1995 Volume.7 No. 1 p.15 ~ p.31
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Dose Characteristics of Stereotatic Radiosurgery CONE used for ML-6M Linear Accelerator
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Kim Hyeon-Jin
Kim Young-Seok
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Abstract
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The radiosurgery treatment is one time, non surgical approach to the treatment of patients with intracranial disorders whose conditions would be difficult or dangerous to treat with conventional sugical procedures. The LINAC based radiosurgery is based on the combination of multiple isocentric arc irradiation with small fields centered in the stereotactic target. The absorption of the beam in a tissue equivalent medium, such as water, as well as the uniformity, or profile, of the beam must be precisely documented. The beam characteristics and dosimetric measurememts of the 6MV X-ray beam from a ML-6M linear accelerator are examined. The percent depth dose (PDD) and beam profile (including flatness, symmetry and penumbra) is calibrated with the radiosurgery cone in water phantom. The cone is made of lead which size is from to All of these dosimetric measurements sufficiently characterized the beam to permit safe clinical use,
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KEYWORD
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Small field, Radiosurgery, percent Depth Dose, Beam profile
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