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Planning
Target coverage is ≥90% of the prescribed dose covering ≥90% of PTV-Eval
Skin dose should not exceed prescription dose
2 parameters important
1) The volume of tissue receiving higher doses
•
V150 and V200 should be limited to ≤70 cc and ≤20 cc, resp.
2) Dose homogeneity index
•
DHI is the volume ratio, i.e. 1-(V150/V100). DHI will be ≥0.75
In addition, <60% of the breast should receive ≥50% dose
Multi-catheter interstitial brachytherapy
Tang et al, J Contemp Brachyther 2014