Derek Smith on

Derek Smith

MBChB FRCR PGCert (Clin Ed)

Dr Derek Smith is a neuroradiologist in Edinburgh, Scotland.

His involvement with Radiopaedia started from medical school, with imaging teaching making a substantial part of his full time medical education OOPE fellowship in 2019-20. His clinical interests include trauma, neuroradiology and head and neck imaging.



University of Edinburgh Medical School 2007-2012
Foundation Trainee, South East Scotland 2012-2014
Clinical Development Fellow, NHS Lothian 2014-2015
Clinical Teaching Fellow, NHS Lothian 2019-2020
Specialty Registrar, Clinical Radiology, SE Scotland, 2015-2021



Radiopaedia 2020 Neck Infections (
Radiopaedia 2021 Epilepsy in adults: approach to MRI brain interpretation // Neck Emergencies
FRCR 2B Materials Radiopaedia Rapids // Radiopaedia Vivas


  • no pharmaceutical or medical device conflict of interest
13 results found

Question 1566

Given the position effect on the parapharyngeal space, where do you think this deep neck abscess has originated?


Question 1567

Which structure is this mixed laryngocele passing through?


Question 1568

What is the most likely source of this masticator space abscess?


Question 1605

What is the most likely cause of breathlessness in this elderly patient?


Question 1607

In a patient with low back / coccygeal pain, on standing and seated radiographs there is a 28° change in angulation of the coccyx. This measurement indicates the coccyx is:


Question 2126

A 20-year old woman is being investigated for epilepsy, and has the following MRI performed. The most likely region of seizure activity is the: 


Question 2127

A 16-year-old woman has MRI findings compatible with right parietal focal cortical dysplasia. A hyperintense FLAIR tract is seen between the abnormal cortex and the ventricle. What type of FCD is this in the Blumcke classification system?


Question 2128

What is the most likely cause of this 25-year-old patient's seizures?


Question 2129

A 40-year-old woman with medically refractory epilepsy has an MRI. This shows a T2W hyperintense region at the right posterior insula, which incompletely suppresses on FLAIR at the periphery. There is no enhancement following intravenous contrast administration. What is the most likely lesion causing this patient's seizures?


Question 2130

This 60-year-old man suffered a penetrating neck injury. A contrast-enhanced CT is performed, with a skin and soft tissue defect through the left sternocleidomastoid, just superior to the level of the carotid bulb. The trauma surgeon wants to know the zone of injury. You can tell them this is a...


Question 2131

This 50-year-old man was involved in a road traffic collision, with blunt force trauma to the neck. There is evidence of supraglottic trauma on endoscopy. Which laryngeal structure is damaged on this CT?


Question 2133

This 50-year-old man experienced neck pain, with left pupillary abnormality and swallowing difficulty. An MRI is performed a few days later, with the T1W fat saturated sequence confirming the left internal carotid artery dissection. What is the hyperintensity on the T1FS sequence?


Question 2134

This 18-year-old suffered a head and cervical spine injury after crashing his mountain bike off a jump. He is quadriplegic.

CT and MRI were performed.

What is the WORST prognostic sign in this case?