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.

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, 13 Park Terrace, Carmarthen, Carmarthenshire, SA31 3DG.

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.

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