For low back pain in screening, imaging is generally indicated in which scenario?

• A. When there are no red flags and symptoms are improving.
• B. Only after six months with no improvement.
• C. Imaging should be used for all back pain.
• D. When red flags are present, severe/progressive neuro deficits, or persistent symptoms despite care.

Answer: (D)

Imaging is most justified in screening when there are red flags suggesting a serious problem (such as cancer, infection, or fracture), or when there are severe or progressive neurological deficits, or when symptoms persist despite appropriate conservative care. In these situations, imaging helps identify the exact cause and guide urgent or targeted treatment. For uncomplicated cases without red flags that are improving, imaging isn’t needed, and imaging all back pain or waiting many months before imaging isn’t appropriate.