3/6/9 rule (adult abdominal X-ray)

Normal diameter of intestines:

• Small bowel: less than 3 cm
• Large bowel (transverse colon, ascending colon, descending colon): less than 6 cm
• Caecum: less than 9 cm

Further reading: https://www.radiologymasterclass.co.uk/tutorials/abdo/abdomen_x-ray/anatomy_system_bowel_gas

DEXA is an abbreviation of dual-energy X-ray absorptiometry

Purpose

• It’s used to measure bone mineral density (BMD). This helps to diagnose conditions such as osteoporosis, and osteopenia.

Advise to Patients

• Advise patient to avoid taking calcium supplements for at least 24 hours before bone density test
• Otherwise, no other special preparations needed

Indications to Request USG KUB

• TRO obstructive uropathy
• TRO renal parenchymal disease
• TRO renal artery stenosis
• TRO calcification of vessels (renal transplant workup)