Radiographic Procedures: Body Cavities Questions and Answers Flashcards

What is the correct centering for an AP supine abdomen (KUB)?

Answer: Iliac crest on the midsagittal plane

Centre at the iliac crest to include diaphragm to symphysis pubis.

What preparation is required for an upper GI series with barium?

Answer: NPO 6-8 hours and no smoking or gum chewing

Fasting ensures an empty stomach for proper barium mucosal coating.

What must a properly positioned PA chest demonstrate?

Answer: Both lung fields, costophrenic angles, heart, mediastinum, thoracic spine, and apices free from clavicular superimposition

All thoracic structures must be demonstrated with proper positioning criteria.

What is the purpose of the erect abdomen radiograph?

Answer: Demonstrates air-fluid levels and free air under the diaphragm

The erect view shows gravity-dependent air-fluid levels and pneumoperitoneum.

What is the correct positioning for a lateral chest radiograph?

Answer: Arms raised or held forward, left side against detector, true lateral alignment

Left side against detector minimizes cardiac magnification, arms out of the thoracic field.

Why must both hemidiaphragms be shown on abdominal radiographs?

Answer: Allows detection of free air and assessment of lower lobe pathology mimicking abdominal disease

Hemidiaphragm inclusion enables pneumoperitoneum detection and lower lobe pathology identification.