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Diagnostics Guide · Radiology & Imaging

Demystifying Digital X-Ray vs Ultrasound vs Doppler: When is which test recommended?

Published 28 May 2026Updated 8 Sept 2026 1 min read

Written by

Dr. Anirban Sengupta

Medical Director & Radiologist

Demystifying Digital X-Ray vs Ultrasound vs Doppler: When is which test recommended?

Modern diagnostic imaging enables non-invasive inspection of internal anatomy with remarkable precision.

### 1. Digital Radiography (DR X-Ray)

Uses low-dose X-radiation to produce instant digital images of bones, joints, spine alignment and lung parenchyma. It is ideal for fractures, arthritis and pneumonia.

### 2. High-Resolution Ultrasound (Sonography)

Employs safe high-frequency sound waves (zero radiation). Supreme for soft organs: liver, kidneys, gallbladder stones, uterus, ovaries and thyroid nodules.

### 3. Colour Doppler Studies

Applies the Doppler shift principle to map blood flow velocities and turbulence inside arteries and veins in real-time. Essential for stroke screening (Carotid Doppler) and leg swelling (DVT Doppler).

Diagnostic information intended for patient awareness. Imaging studies should be conducted upon doctor referral.