A small portion of patients can be cured with a second course of radiotherapy, and in many cases, palliation can be obtained. Low toxicity of reirradiation with use of modern techniques should allow for the delivery of higher doses and, in consequence, lead to an improvement in reirradiation outcome.
BAT ensures the relative positions of target are the same during treatment and in treatment plan, however, the reliability of alignment is patient-dependent. The average BAT-determined misalignments were small, confirming the prevalence of random errors in 3-D CRT. Further study is warranted in order to establish the clinical value of BAT.
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