Imaging & Radiology · Medical Imaging · Medium
Penumbra
Meaning: Blurred edge of an image caused by a finite X-ray focal spot, or salvageable brain tissue around a stroke.
In practice: CT perfusion identified a large penumbra, so the patient was taken for thrombectomy.
Quick check
Two questions on related imaging & radiology words.
Which word means: An image produced by exposing a detector to X-rays passing through the body.
Answer: Radiograph
Which word means: Ultrasound artefact where sound bounces repeatedly between surfaces, producing multiple evenly spaced lines.
Answer: Reverberation
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