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Aneurysms (intracranial)

Welcome to our comprehensive guide to interventional radiology for brain aneurysms. Here, we will cover the basics of neuroradiology, as well as the critical role that the interventional neuroradiologist (INR) plays in the diagnosis and treatment of brain aneurysms.

A brain aneurysm is a bulge in the wall of an artery in the brain. This bulge can cause the artery to weaken and possibly rupture, leading to a potentially life-threatening condition called subarachnoid hemorrhage. Because of the high risk associated with brain aneurysms, it is critical to diagnose and treat them as early as possible.


Neuroradiology is a subspecialty of radiology that focuses on imaging and diagnosing conditions of the brain and nervous system. They use a variety of imaging techniques, including CT and MRI scans, to produce detailed images of the brain and identify any abnormalities.

Interventional Neuroradiology

Interventional neuroradiology, also known as neurointerventional surgery or endovascular neurosurgery, is a specialized branch of interventional radiology that focuses on treating conditions of the brain and nervous system through minimally invasive techniques.

In the case of brain aneurysms, interventional neuroradiologists can use a procedure called endovascular coiling to treat the aneurysm. This involves inserting a thin, flexible tube called a catheter into an artery in the groin and guiding it through the blood vessels to the site of the aneurysm. Once there, the catheter delivers small coils made of platinum or other materials to the aneurysm, which helps to block off the blood flow and prevent the aneurysm from rupturing.

Interventional neuroradiology also offers several other minimally invasive procedures to treat brain aneurysms, including stenting and flow diversion.

Stenting is a procedure that involves placing a small metal mesh tube, called a stent, across the neck of the aneurysm. This helps to prevent the aneurysm from rupturing by improving blood flow to the area and creating a barrier that prevents blood from entering the aneurysm. Stenting is often used in combination with other procedures, such as coiling, to provide additional support and stabilisation to the aneurysm.

Flow diversion is a technique that involves placing a stent-like device called a flow diverter across the neck of the aneurysm. This device is designed to divert blood flow away from the aneurysm and toward healthier blood vessels, which helps to reduce the risk of rupture. Over time, the flow diverter encourages the formation of new blood vessel tissue around the aneurysm, further reducing the risk of rupture.


Interventional radiology plays a critical role in the diagnosis and treatment of brain aneurysms. By utilizing advanced imaging techniques and minimally invasive procedures, interventional neuroradiologists can help to identify and treat these potentially life-threatening conditions in a safe and effective manner.