แปลผลภาพถ่ายรังสีช่องท้อง (Approach to abdominal radiograph)
LINK Abdominal X-ray- an approach
LINK abdominal x-ray interpretation
Indications
Although abdominal radiography has lower sensitivity and specificity than a CT of the abdomen, it still serves a role as an adjunct or optional test. Current uses for abdominal radiography include:
- a preliminary evaluation of bowel gas in an emergent setting
- a negative study in a low pretest probability patient may obviate the need for a CT study and therefore lower radiation dose
- evaluation of radiopaque tubes and lines
- evaluation for radiopaque foreign bodies
- evaluation for postprocedural intraperitoneal/retroperitoneal free gas
- monitoring the amount of bowel gas in postoperative ileus
- monitoring the passage of contrast through the bowel
- colonic transit studies
- monitoring renal calculi
basic
Anatomical positions of organs
Appearance of structure
Density of structure on X-ray
1. Gas
2. Fat
3. Fluid & Soft tissue
4. Bones and calcification
5. Metallic densities
Gas:
Abnormal free gas (Pneumoperitoneum): Falciform ligament sign, Rigler sign (Double bowel walls sign, Football sign
Abnormally located bowel: Chilaiditi syndrome (bowel interposed between liver and hemidiaphragm), Inguinal hernia
Intramural bowel gas (Pneumatosis intestinalis)
Bowel obstruction:
Fluid
Abnormal calcifications: Link: intraabdominal calcification
