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MLB (midline block) 3DCRT
•
Central
rectangular
portion with an area
10
×
4 cm at isocenter
•
Homogeneity around
target for teletherapy
and brachytherapy
•
Thickness of 5.5 HVL
•
The fall-off of dose
between point A and
point B is estimated by
normalizing the point A
dose value to 100%.