GIT Radiological investigations and anatomy

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Presentation transcript:

GIT Radiological investigations and anatomy Dr. Sultan Alharbi Assistant Professor and Consultant Interventional Radiologist

Objectives: To know various radiological investigations used for GIT. To understand step wise approach in requesting GIT radiology investigations. To be familiar with radiological appearance (anatomy) seen in various imaging modalities. To interpret plan x-ray radiograph of abdomen with common pathologies.

Reference: Diagnostic imaging: Chapter 5 and 6

What are radiological investigations that you know ?

IMAGING MODALITIES: X-RAY. FLUOROSCOPY ( CONTRAST STUDY). ULTRASOUND. CT. MRI. NUCLEAR MEDICINE. ANGIOGRAPHY.

What is peculiar about GIT?

GIT characteristics: Hallow viscus ( not solid). Usually filled with gas. Motility.

X-ray ( plain radiography) Often used as first imaging modality. Cheap. Fast. Can be done bedside (portable) Useful for free gas or bowel obstruction.

Fluoroscopy (contrast study) Can be used as first imaging modality. Cheap. Use of contrast. Recently replaced by CT and MRI Useful for intraluminal pathology. Can give clue about the motility (function)

Ultrasound Relatively cheap. No radiation. Limited uses (gas filled structures). Used in pediatrics and pregnant ladies

CT ( computer tomography) Expensive. More radiation. Fast. Contrast (iv, oral &rectal) usually used. Used in emergency department.

MRI ( Magnetic resonance imaging) More expensive than CT. No radiation. Slow and affected by artifacts.

Radiological appearance of GIT

2 1 5 3 4

Transverse colon stomach Small bowel cecum Descending colon

4 5 6 3 7 2 8 1

Rectum Sigmoid colon Descending colon Splenic flexure Transverse colon 4 5 6 Rectum Sigmoid colon Descending colon Splenic flexure Transverse colon Hepatic flexure Ascending colon cecum 3 7 2 8 1

?

S stomach. L liver. A aorta.

5 2 1 6 4 3

5 2 1 6 4 3 1- Rectum 2-Sigmoid colon 3-Descending colon 4-Ascending colon 5-Transverse colon 6-Cecum

3 2 4 1 5 6

3 2 4 1 5 6 Descending colon Splenic flexure Hepatic flexure Ascending colon cecum Sigmoid colon

MRI enterography

Common plain x-ray abdomen radiograph findings

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