CT angiography is a special radiological examination procedure which we only recommend when an MRI scan cannot be conducted due to the required X-rays associated with a CT angiogram. This technology displays the body's circulatory system in three-dimensional cross sections. These images enable us to assess the health of your blood vessels.
Thanks to the technical advancements of recent years, all vascular regions can be depicted as high-resolution spatial images. Not only that but the high speed of this technique allows us to scan and display even entire vascular systems in one single examination.
So most abnormalities of the arteries can be non-invasively depicted:
In other words, it is not necessary to penetrate your body nor is a direct puncture of the artery in your groin required as is the case in conventional angiography or in a cardiac catheter examination. CT angiography is basically the same for all vascular regions — there are no discernible differences as far as the patient can tell.
CT angiography can examine the following regions:
- renal arteries
- carotid arteries
- peripheral arteries
- visceral arteries
- subclavian arteries
- transplanted arteries
When may the examination not be conducted?
The same absolute and relative contraindications apply to CT angiography as they do to every CT scan that uses an intravenously injected contrast agent containing iodine. The main contraindications are summarized below. In order to determine whether a contrast agent can be administered or not, every patient is given a standardized questionnaire prior to the examination.
The following are the absolute contraindications against CT angiography using a contrast agent:
- kidney disorder
- untreated overactive thyroid gland (hyperthyroidism)
- known allergy to contrast agents containing iodine
- current pregnancy
Whole-Body CT Angiography
Whole-body CT angiography depicts all vascular regions of the body within a short amount of time in one single procedure. We only recommend such an examination when whole-body MR angiography is impossible due to medical reasons or when you...» More about Whole-Body CT Angiography
CT Angiography of the Renal Arteries
We conduct CT angiography of the renal arteries when there are contraindications against an MRI scan. In most cases, the goal is to clarify whether a patient's existing high blood pressure is caused by a constriction of the renal arteries (...» More about CT Angiography of the Renal Arteries
CT Angiography of the Head and Neck
We recommend a CT angiography of the head and neck when there are important reasons against performing an MRI scan. In most cases, a CT angiogram is necessary when there is the possibility of a constriction of the internal carotid arteries...» More about CT Angiography of the Head and Neck
CT Angiography of the Peripheral Arteries
When contraindications against an MRI scan exist, then we recommend CT angiography. This technology serves to diagnose a possible peripheral artery occlusive disease (PAOD; intermittent claudication). CT angiography can prove or rule out the...» More about CT Angiography of the Peripheral Arteries