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MV 2D
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Widely available
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Ability to acquire continuous “snapshot” during the fraction
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Will provide field border information
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Will provide assessment of lung volume, breast contour
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Adequate for whole breast RT with standard fractionation
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Typically 5mm tolerance is acceptable
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Difficult to visualise surgical clips
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Depending on lung in field, generally sufficient information
from a “single” acquisition
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Easier to include imaging dose in treatment plan