What is the first-line imaging study for acute headache with suspected intracranial bleed?

What is the first-line imaging study for acute headache with suspected intracranial bleed?

• A. MRI
• B. CT scan
• C. X-ray skull
• D. Ultrasound

Answer: (B)

When acute headache raises concern for an intracranial bleed, you need an imaging test that can rapidly detect blood. A noncontrast head CT is the best first choice because it can be done quickly in the emergency setting and is highly sensitive for acute hemorrhage within the first hours, showing blood as bright (hyperdense) areas and outlining the bleed’s location and effects like mass effect. MRI is more sensitive for certain findings and later-stage changes, but it takes longer, is less readily available for emergent assessment, and can delay treatment, so it isn’t used as the initial study in this scenario. Skull X-ray and ultrasound don’t reliably detect intracranial bleeding, so they aren’t appropriate first-line options.

When acute headache raises concern for an intracranial bleed, you need an imaging test that can rapidly detect blood. A noncontrast head CT is the best first choice because it can be done quickly in the emergency setting and is highly sensitive for acute hemorrhage within the first hours, showing blood as bright (hyperdense) areas and outlining the bleed’s location and effects like mass effect.

MRI is more sensitive for certain findings and later-stage changes, but it takes longer, is less readily available for emergent assessment, and can delay treatment, so it isn’t used as the initial study in this scenario. Skull X-ray and ultrasound don’t reliably detect intracranial bleeding, so they aren’t appropriate first-line options.