Read Practical Fluoroscopy of the GI and GU Tracts : A Primer on Technique and Interpretation
Ch 1: Pharynx
Ch 2: Examination of the esophagus, stomach, and duodenum: techniques and normal anatomy
Ch 3: Esophagus
Ch 4: Stomach

Watch lectures:
Imaging of the esophagus, by Cassidy
Imaging disease of the stomach, by Levy

Read Practical Fluoroscopy of the GI and GU Tracts : A Primer on Technique and Interpretation
Ch 5: Duodenum
Ch 6: Examination of the small intestine: techniques and normal anatomy
Ch 7: Small intestine
Ch 8: Examination of the colon: techniques and normal anatomy

Read article:
Imaging of Bariatric surgery: Normal Anatomy and Postoperative Complications

Read Practical Fluoroscopy of the GI and GU Tracts : A Primer on Technique and Interpretation
Ch 9: Colon
Ch 10: Fluoroscopic evaluation of the bladder, urethra, and urinary diversions
Ch 11: Retrograde pyelography