2344-2345 / 2953
CRT vs IMRT
Beam profile #1
Dose
intensity
RO
RO
3-field RT
3-field IMRT
Prescribed dose
(typical distribution)
IMRT allows dose distribution to be shaped to the
target, sparing at-risk organs
Beam
profile #2
Beam
profile #3
PTV
PTV
CRT: Conformal radiotherapy. IMRT: Intensity-modulated radiotherapy.
PTV: Panning target volume. RO: Risk organ
12