Methods of obtaining dose uniformity across field junctions include which of the following?
I.Dosimetric isodose matching
II.Separated fields
III.Junction shift
IV.Half beam blocking
V.Geometric matching

Question

Quizplus · Accepted Answer

Dosimetric isodose matching is accomplished by using the treatment planning computers to determine hot and cold spots and viewing isodose curves.A junction shift moves the edges of the adjacent fields.Over the course of treatment, the hot or cold spot is feathered.Half beam blocking is blocking along the central ray of the beam where there is no divergence, thereby eliminating divergence at depth.Geometric matching mathematically calculates the divergence of fields to match at a point in depth.

Methods of Obtaining Dose Uniformity Across Field Junctions Include Which