Dr Alwan-Walker has special interests in all aspects of gastrointestinal (GI) and GI interventional radiology, as well as general paediatric radiology.

Dr Butterfield specialises in vascular diagnostic and interventional radiology of both the arterial and venous systems. He performs procedures involving all aspects of peripheral vascular intervention, including complex below-knee procedures and pedal access. He also performs aortic stenting and stent grafting, embolisation, arterial thrombolysis and venous interventions. Dr Butterfield has a special interest in drug eluting angioplasty balloons and stents for peripheral vascular disease.

Interventional radiology (vascular and non-vascular) • Diagnostic imaging (CT, MRI including prostate and cardiac CT) • Vascular access, stenting, embolisation, nephrostomy • ENT/head and neck surgical background • Radiology-related clinical negligence and delayed diagnosis All correspondence to: British Medical Experts, 60 Tottenham Court Road, Suite 6177a, Fitzrovia, London, W1T 2EW .

Dr Byott has a highly developed interest in interventional radiology. He has subspecialist expertise in vascular interventional radiology, including vascular access, paediatric interventional radiology, treatment of arterial disease, venous pathology and haemorrhage control. In addition, he specialises in independently reporting vascular imaging including cardiac/TAVI CT, general CT, ultrasound, contrast studies and core MRI examinations.

Interventional radiology: endovascular arterial/venous procedures, complex venous access, hepatobiliary work, percutaneous tumour ablation General radiology: US (thoracic, abdominal, GU, vascular, image-guided biopsy/drainage); CT (body, head, trauma, angiography, urograms, CT-guided biopsy/drainage); MRI (vascular MRA/MRV); GI and urological contrast imaging including oesophagus All correspondence to: British Medical Experts, 60 Tottenham Court Road, Suite 6177a, Fitzrovia, London, W1T 2EW .

Interventional radiology - vascular and non-vascular • Diagnostic imaging – CT, MRI, ultrasound • Image-guided biopsy and embolisation • Renal transplant imaging and AV fistulae • Consent, capacity and medical ethics All correspondence to: British Medical Experts, 60 Tottenham Court Road, Suite 6177a, Fitzrovia, London, W1T 2EW .

Radiology • Neuroradiology • Cerebral and spinal angiography • Treatment of acute and elective aneurysms • Mechanical thrombectomies • Treatment of arteriovenous malformations and dural arteriovenous fistulae • Pre-operative tumour embolisation • Parent vessel and balloon occlusion All correspondence to: British Medical Experts, 60 Tottenham Court Road, Suite 6177a, Fitzrovia, London, W1T 2EW .

Interventional and vascular radiology

Diagnostic imaging (CT, MRI, ultrasound) • Interventional radiology (vascular and non-vascular procedures) • CT- and ultrasound-guided biopsies and drainage • Prostate MRI and PI-RADS reporting • Uro-radiology and renal imaging • Errors in scan interpretation and delayed diagnosis • Interventional radiology safety and complications All correspondence to: British Medical Experts, 60 Tottenham Court Road, Suite 6177a, Fitzrovia, London, W1T 2EW .

Interventional radiology (vascular and non-vascular) • General and cross-sectional imaging (CT, MRI, US) • Oncology and urological imaging • Emergency and trauma radiology • Image-guided procedures and biopsies All correspondence to: British Medical Experts, 60 Tottenham Court Road, Suite 6177a, Fitzrovia, London, W1T 2EW.

Vascular and non-vascular interventional radiology • Post-procedural complications and misadventure • Urological and hepatobiliary interventions • Interventional radiology consent and safety governance • CT/MR angiography and image-guided diagnostics All correspondence to: British Medical Experts, 60 Tottenham Court Road, Suite 6177a, Fitzrovia, London, W1T 2EW .