Evaluate for underlying etiology (e.g. rule out new neuro dysfunction)
Neck x-ray (AP and lateral)
Helpful in presumed transfer<unk>  and proximal transport<unk> 
CXR
Helpful in presumed transport<unk> 
Helpful in presumed transfer<unk>  and proximal transport<unk> 
Helpful in presumed transport<unk>
Dysphagia
Oropharyngeal dysphagia
Gastroparesis
CVA
Dysphonia
Parkinson's disease
Ataxia 
Brain stem tumors