Presentation on theme: "Abdominal Imaging. The abdominal radiograph Why do we see any structure on a normal abdominal radiograph? It has to be surrounded by tissue of different."— Presentation transcript:
The abdominal radiograph
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).
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
Properitoneal fat Transversus abdominis
A FEW INTERESTING RADIOGRAPHS
Gas outside the bowel. Outling both the inside and outside of the bowel. Free gas
DILATED LARGE BOWEL WITH NO BOWEL WALL THICKENING Turned out to be a sigmoid tumour.
Gross large bowel wall thickening. Secondary to ulcerative colitis