ASN CNSA case studies
ASN CNSA · Put your knowledge to work in context.
The American Society of Neuroimaging (ASN) describes certification as a way to "recognize advanced expertise and professional achievement" for neuroimaging professionals, and its site lists two currently offered credentials: Neurosonology (RPNI) and Neurovascular Specialist (NVS). A separate "Neuroimaging Examination" is announced on the ASN site as "Coming 2027!" and is not yet available, so candidates today should plan around RPNI or NVS. The ASN CNSA case studies are 5 cases and about 2,546 words.
1Asymptomatic 70% ICA Stenosis in a Patient with Contralateral Occlusion
A 68-year-old right-handed man with hypertension and a 30 pack-year smoking history presents after a single episode of transient right-hand weakness lasting 8 minutes, now fully resolved (NIHSS 0). Carotid duplex shows a left ICA peak systolic velocity of 285 cm/s, end-diastolic velocity of 110 cm/s, and a broad spectral fill-in consistent with a hemodynamically significant stenosis; the right ICA is completely occluded with a string sign on color flow.
591 words, about 3 min2TCD Vasospasm Versus Hyperemia After Aneurysmal SAH
A 54-year-old woman is day 6 after clipping of a ruptured anterior communicating artery aneurysm. She is intubated and sedated.
527 words, about 3 min3Neonatal Cranial Ultrasound: Grade of Hemorrhage and Timing of Follow-up
A 28-week gestation infant, now 5 days old, birth weight 1,050 g, is being screened with cranial ultrasound. The anterior fontanelle is small but adequate.
474 words, about 2 min4Vertebral Artery Dissection Versus Atherosclerotic Stenosis on Duplex
A 39-year-old woman presents with sudden severe neck pain and vertigo after a chiropractic manipulation. She has no vascular risk factors.
519 words, about 3 min5TCD in a Patient with a Poor Acoustic Window and Suspected MCA Occlusion
A 72-year-old man with atrial fibrillation presents with acute left hemiplegia and neglect (NIHSS 18). Non-contrast CT is normal.
435 words, about 2 min