Aneurysm Follow-up and Aftercare: Noninvasive MR Angiography

Aneurysm Follow-Up – Gentle Monitoring with Modern MR Angiography

Using specialized MRI examinations, we can regularly monitor treated brain aneurysms—often without the need for contrast agents or X-ray radiation.

A cerebral aneurysm is a bulge in the wall of a blood vessel in the brain. To reduce the risk of bleeding, aneurysms can be treated with minimally invasive procedures, such as small metal coils, stents, or so-called flow diverters.

After such treatment, regular follow-up examinations are important to assess the long-term success of the treatment.

Our specialized imaging procedures

• MR angiography without contrast agent: Using a special MRI technique (3D-TOF-MRA), we can visualize the brain’s blood vessels and blood flow without administering a contrast agent. This allows us to check in many patients whether the treated aneurysm remains closed or whether blood is flowing into it again.

• MRI angiography with contrast agent: In certain situations, administering an additional contrast agent may be advisable. It allows for a more precise assessment when images taken without contrast do not provide clear results.

• Follow-up after stent or flow diverter treatment: We assess whether there are signs of the aneurysm refilling or of narrowing in the treated vessel. Since the implants used can affect MRI images, we select the examination methods on a case-by-case basis.

• Catheter angiography (DSA) for specific issues: If MRI does not allow for a sufficiently reliable assessment or if repeat treatment is being considered, additional catheter angiography may be necessary. This provides particularly detailed images of the cerebral vessels.

Why are regular follow-up exams important?

Even after successful treatment, there are rare cases in which an aneurysm may become reperfused or changes may develop in the treated vessel.

Through regular follow-up examinations, we can detect such changes early on and, if necessary, take further action in a timely manner.

MR angiography is particularly advantageous in this regard, as it does not involve X-rays and can often be performed without contrast dye.

Individualized Follow-Up Care and Interdisciplinary Collaboration

Which examination is most appropriate and how often follow-up visits should take place depends on the size and location of the aneurysm, the type of treatment, and the implants used.

If necessary, the results are discussed together with the treating specialists during our neurovascular conference.

For more information, see Interventional Therapy.

Our goal: Follow-up care that is as gentle, reliable, and individually tailored as possible—for long-term safety after aneurysm treatment.

SPECIALIZED VASCULAR MRI

Specialized Vascular MRI – Early Detection of Diseases of the Brain and Neck Blood Vessels

Using modern MRI techniques, we can examine not only the blood vessels of the brain and neck but also their vessel walls with exceptional precision.

Changes in the blood vessels can have various causes. These include inflammation of the vessel walls, narrowing of the vessels, or damage to the inner layers of the vessel walls.

Using specialized MRI examinations, we can visualize such changes, pinpoint their causes more precisely, and identify potential risks at an early stage.

Our specialized imaging techniques

• Black-Blood MRI – Visualizing the Vascular Wall: In this specialized MRI technique, the signal from the flowing blood is suppressed. This allows us to visualize the vascular walls in great detail and search for pathological changes.

• Detection of Vascular Inflammation (Vasculitis): Inflammation of the blood vessels can lead to thickening of the vessel walls and impaired blood flow. Using high-resolution MRI images, often with contrast agents, we can identify signs of such inflammation and distinguish it from other vascular diseases.

• Distinguishing Between Inflammation and Arteriosclerosis: Not every narrowing of a blood vessel is caused by inflammation. Atherosclerotic changes can also constrict blood vessels. Specialized MRI images help us better classify the different causes.

• Targeted examination of the neck vessels when a dissection is suspected: A dissection involves a tear in the vessel wall, allowing blood to seep between the layers of the wall. This can affect, for example, the carotid arteries or the vertebral arteries. Using MRI and MR angiography, we can detect such changes, including hemorrhages into the vessel wall, vessel narrowing, and changes in blood flow.

When is a specialized vascular MRI recommended?

Such an examination may be necessary, in particular, when vascular inflammation is suspected, in cases of unexplained vascular narrowing, or when a dissection of the carotid arteries is possible.

The examination can also help identify the underlying cause in cases of certain strokes or transient neurological deficits.

Why is the combined examination so important?

Conventional vascular examinations primarily show how blood flows through the vessels. With specialized black-blood MRI, we can also assess the vessel walls themselves.

By combining both techniques, we obtain important information about the condition of the vessels and can detect changes that might otherwise go undetected if only blood flow were imaged.

Close Collaboration with Neurology

Our specialized vascular examinations are conducted in close collaboration with the treating neurologists. Together, we evaluate the MRI results in conjunction with the patient’s symptoms, laboratory findings, and other test results.

Our goal: to detect vascular diseases early, determine their causes as accurately as possible, and, through targeted diagnostics, lay the foundation for a personalized treatment plan.