XT	photon therapy
PT	proton therapy
NIPP	Netherlands’s National Indication Protocol Proton therapy
NCC	convolutional neural network
DL	deep learning
NTCP	normal tissue complication probability
RT	radiation therapy
IMRT	intensity-modulated radiation therapy
VMAT	volumetric modulated arc therapy
IMPT	intensity-modulated proton therapy
OAR	organs at risk
MRI	magnetic resonance imaging
NPC	nasopharyngeal carcinoma
TPS	treatment planning system
PMC U	pharyngeal constrictor muscles upper
PMC M	pharyngeal constrictor muscles middle
PMC I	pharyngeal constrictor muscles inferior
DPTV	contours and distance map
COM	combined model
PL	parotid left
PR	parotid right
OC	oral cavity
MP	manual plan
MAE	mean absolute error
Dmean	mean dose
AUC	area under curve
ROC	operating characteristic curve
Xer2+	xerostomia ≥ grade 2
Xer3+	xerostomia ≥ grade 3
Dys2+	dysphagia ≥ grade 2
Dys3+	dysphagia ≥ grade 3