Presentation
Middle aged male with esophageal dysmotility. Insistent clinician.
Patient Data

Small amount of iodinated contrast in the esophagus.
Large volume of contrast in the tracheobronchial tree, with a particularly splendid 'bronchogram'in the left lower lobe illustrating segmentation anatomy of the lung.
Case Discussion
The radiologist has the right to undertaken a study as s/he see fits to the clinician information.
Take your own clinical history too - we are clinical radiologists after all.
If any doubt about aspiration at least start, if not do the whole study, with water soluble contrast to minimize risk.
If aspiration occurs ensure the patient received chest physiotherapy.