. Author manuscript; available in PMC: 2012 Nov 5.

Published in final edited form as: Brachytherapy. 2012 Jan-Feb;11(1):47–52. doi: 10.1016/j.brachy.2011.07.002

Table 3.

Suggested doses for template-based HDR interstitial brachytherapy after 45–50.4 Gy of external beam.

Dose of EB radiotherapy	Brachytherapy dose^*	EQD2 (Gy) to CTV
45 Gy/25 fractions	3.5 Gy × 9	79.7
	4.25 Gy × 7	79.6
	5 Gy × 5	75.5
50.4 Gy Gy/28 fractions	3 Gy × 9	78.8
	4.5 Gy × 5	76.7

Twice a day treatments with approximately 6 hours between fractions (based on general radiobiological principles) over one week. The 9-fraction regimen is given over 4.5 days in one week with one insertion. Other regimens using other doses of external beam are also acceptable.