MRI can show the same findings  found in CT scan such as esophageal dilation and air fluid levels. MRI can also reveal the underlying cause of achalasia such as esophageal adenocarcinoma.
Achalasia MRI
Achalasia CT
Achalasia physical examination
Zenker's diverticulum physical examination
Esophageal stricture MRI
Achalasia ultrasound
Dysphagia MRI
Esophageal candidiasis physical examination