In vivo surface dose measurement using GafChromic film dosimetry in breast cancer radiotherapy: comparison of 7-field IMRT, tangential IMRT and tangential 3D-CRT

Table 1 PTV, fractionation regimen, radiotherapy technique and timing of the in vivo Gafchromic film dosimetry

				RT technique 1		RT technique 2		In vivo FD
PTV	n/p	D/f (Gy)	n/f	RT technique	Fraction number	RT technique	Fraction number	Fraction number
Patient series 1: 3D-CRT versus TB-IMRT
Whole breast	17 (7)	1.80	28	3DCRT	1-25	TB-IMRT	26-28	23-28
Whole breast	1 (1)	2.67	15	3DCRT	1-12	TB-IMRT	13-15	10-15
Chest wall	14 (7)	2.00	25	3DCRT	1-22	TB-IMRT	23-25	20-25
Patient series 2: TB-IMRT versus 7 F-IMRT
Whole breast	7 (0)	1.80	28	TB-IMRT	1-25	7 F-IMRT	26-28	23-28
Whole breast	1 (0)	2.67	15	TB-IMRT	1-12	7 F-IMRT	13-15	10-15
Chest wall	5 (4)	2.00	25	TB-IMRT	1-22	7 F-IMRT	23-25	20-25

Abbreviations: PTV planning target volume, n/p Total number of patients (number of patients with left-sided breast cancer), D/f (Gy) Dose per fraction (Gy), n/f Number of fractions, RT technique Radiotherapy technique, In vivo FD In vivo Gafchromic film dosimetry, 3D-CRT Conformal 3-dimensional radiotherapy, TB-IMRT Tangential beam intensity modulated radiotherapy, 7 F-IMRT 7-field intensity modulated radiotherapy.

ISSN: 1748-717X