<prompt> Gastro-oesophageal reflux is best detected byEndoscopyUSGBarium studyIsotope scan  <response>: A i.e. Endoscopy - G-O-Reflux is best diagnoses by 24 hours Acid studyQ the next best investigation is EndoscopyQ. - 24 hours PH recording Acid StudyQ is the gold standerd for GOR diagnosis. 