Abdominal Imaging

1. Abdominal Imaging

2. The abdominal radiograph

3. Why do we see any structure on a normal abdominal radiograph? • It has to be surrounded by tissue of different attenuation (x-ray stopping power). • we therefore see margins delineated by air (the mucosal surface of air filled bowel) • Things outlined by fat (usually the kidneys. the psoas margins ,the bladder and the abdominal wall).

4. We can only see • gas • soft tissue (effectively water density)-viscera, bowel and bowel wall, bladder. • bone and calcium-stones, calcified lymph nodes,stones(90% renal, 10% gallstones) • Fat

5. Properitoneal fat Transversus abdominis

10. A FEW INTERESTING RADIOGRAPHS

11. Gas outside the bowel . Outling both the inside and outside of the bowel. Free gas

12. DILATED LARGE BOWEL WITH NO BOWEL WALL THICKENING Turned out to be a sigmoid tumour.

14. Gross large bowel wall thickening. Secondary to ulcerative colitis

15. Causes of colitis • Inflammatory bowel disease • Ischaemic colitis • Pseudomembranous colitis • Amoebic,schistosoma etc

16. Gas outside the bowel . Outling both the inside and outside of the bowel. Free gas

17. Aortic aneurysm

20. Basic CT Anatomy

21. anterior mhv IVC left right rhv posterior

23. anterior gb ha stomach pv cl (1) left right ra spleen rk posterior

32. anterior pancreas cd sv d left right rk lk posterior

33. gallbladder Fluid in lesser sac

35. Renal vein Renal pelvis Renal artery

36. anterior right left u u posterior

37. anterior u u Right left posterior

38. anterior nav bladder left right u u posterior

41. Right gastric –small, from proper hepatic or Lt gastric Left gastric A Common Hepatic A Splenic A Gastroduodenal A Pancreaticoduodenal A

44. Image of an aneurysm to discuss suitability