Barium studies cannot diagnose<unk>  but are helpful in identifying any underlying anatomical abnormalities such as strictures or rings.
Esophagitis x ray
Epiglottitis x rays
Peritonsillar abscess CT scan
Peritonsillar abscess Ultrasound
Esophageal cancer CT
Hemoptysis CT scan
Esophagitis physical examination
Odynophagia MRI