Fig 1.
Delineated planning target volume (PTV) for esophageal cancer in beam’s eye view (BEV) and jaw setup of IMRT plans.
(A) Jaw setup of large field IMRT plans. (B) Jaw setup of small field IMRT plans.
Table 1.
Dosimetric parameters comparison for PTV in four treatment plans.
Fig 2.
Isodose distributions for one patient with esophageal cancer in four treatment plans.
6F-IMRT = six large fields IMRT plans with fixed jaw; 6F-IMRT-T = six large fields IMRT plans with jaw tracking technique; 12F-IMRT = twelve small fields IMRT plans with fixed jaw; 12F-IMRT-T = twelve small fields IMRT plans with jaw tracking technique.
Table 2.
Dosimetric parameters comparison for the organs at risk: Total lung, heart, spinal cord, and spinal cord PRV.
Fig 3.
Average dose-volume histogram (DVH) comparison for lung and heart with four different planning techniques.
6F-IMRT = six large fields IMRT plans with fixed jaw; 6F-IMRT-T = six large fields IMRT plans with jaw tracking technique; 12F-IMRT = twelve small fields IMRT plans with fixed jaw; 12F-IMRT-T = twelve small fields IMRT plans with jaw tracking technique.
Table 3.
The number of monitor units (MU), beam-on time (BOT), and mean dose rate (MDR) for treatment plans created with different planning techniques.