Angiography is a
minimally invasive diagnostic procedure that uses x-rays and an
iodine-containing contrast material to make pictures of blood vessels in the
brain. In cerebral angiography, a thin plastic tube called a catheter is
inserted into the artery of the leg or arm through a small incision in the
tissue. The catheter is navigated to the region under investigation using x-ray
guidance. Once there, the contrast material is pumped into the tube and the
images are captured by ionizing radiation (x-rays).
Intra-arterial
digital subtraction angiography is also known as cerebral angiography (IADSA).
This applies to the electronic acquisition of the photographs instead of using
the x-ray film. The images are modified electronically to remove the
overlapping skull from the image, which usually obscures the vessels, rendering
those remains visible. Not all people require an angiography of the brain. It
is only normally done if your doctor wants more details after other tests to
prepare your treatment.
An angiogram is
also available to treat some disorders affecting neck and brain blood vessels.
Angiography of the brain may assist in the diagnosis of:
·
Aneurysm
·
Arteriosclerosis
·
Arteriovenous malformation
·
Vacuities, or inflammation of
the blood vessels
·
Brain tumors
·
Blood clots
·
Tears in the lining of an
artery
If you have any
allergies or any medical problems, notify your doctor. Some people are allergic
to the substance used during the process. Tell your doctor if you are having
any allergies, like anesthesia allergies or the CT scanning contrast content.
Before testing, your doctor can prescribe anti-allergy medicines. During the
test, certain diseases and medical conditions will increase the risk of
complications. Contrast materials can cause temporary damage to your kidneys if
you have diabetes or kidney disease.
A radiologist, a
specialist in interventional X-ray, and a radiologist may be part of your
health team for this examination. Before the treatment, most people are sedated.
General anaesthesia is given to others — particularly children. Sedation allows
you to feel safe and you will be sleeping throughout.
In the
beginning, your doctor sterilizes your groin region. They insert a catheter
into your blood vessels and your carotid artery (a long, flexible tube). It's
your neck's blood pipe, bringing blood to your brain. A contrast dye
travels through the artery through the
catheter. The doctor then takes several X-rays from the head and neck. You can
be asked to stand still or even hold your breath for a few seconds when taking
the scans. Your doctor would then remove the catheter and position a cloth over
the place of insertion. It takes normally 1-3 hours for the whole process.
Angiography will remove the surgery requirement or need. It can be done more
reliably if surgery remains necessary. A very detailed, simple, and precise
picture of the blood vessels in the brain is given. This is particularly
helpful when considering surgery or other treatment. Cerebral angio results are
more reliable than those produced with carotid ultrasound or other non-invasive
blood vessel imaging. A catheter provides an answer for diagnosis and treatment
combined.
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