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== CT angiography == | == CT angiography == | ||
CT angiography (CTA) refers to using a [[CT]] scan and [[iodine contrast]] to visualise | CT angiography (CTA) refers to using a [[CT]] scan and [[iodine contrast]] to visualise arteries. CT angiography is widely used and possibly the most frequently used angiographic technique. | ||
=== Indications === | === Indications === | ||
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== MR angiography == | == MR angiography == | ||
MR angiography (MRA) refers to using an [[MR]] scan to visualise | MR angiography (MRA) refers to using an [[MR]] scan to visualise arteries. This can be achieved with [[gadolinium]] contrast, or without, due to some modern MR techniques. The earliest MR technique to allow for non-contrast angiography was time of flight (TOF), but nowadays many other techniques exist as well. | ||
MR angiography is usually used instead of CT angiography when it's important to avoid ionising radiation or iodinated contrast material, for example in case of pregnancy and children. | MR angiography is usually used instead of CT angiography when it's important to avoid ionising radiation or iodinated contrast material, for example in case of pregnancy and children. |