Thrombosis of the vessels (contrast is missing inside the vessel occupied by the thrombus).Stenosis (narrowing) of the vessels (e.g.coronaries in patients at risk of heart attack / angina, but practically of any blood vessel in the body).Aneurysm, which is when the vessels dilate because of the weakness of the wall (nearby structures can grow or be compressed, burst with sometimes massive bleeding, coming from the pumps).Haemorrhages (“the contrast comes out of the blood vessels“).the pulmonary artery, to eliminate pulmonary embolism) we can be sure with special techniques of the bolus tracking type. Even if we want to be sure about the opacification of a specific arteryI (e.g. We can speak of its content and be sure about its morphology.ĭepending on the interval between the administration of the contrast and the study being carried out, we can see the arteries very clearly (the CT is carried out a few seconds after the contrast has been administered, e.g. In the second image we see the aorta with contrast inside. In the first image without contrast we can see the aorta as a dark circle and we cannot say anything about its content. Image 2 (axial section of the abdomen with contrast) Now look at image 2 (below) of the axial section of the abdomen with contrast (the aorta and the veins of the liver are marked). Can you identify the aorta or the veins of the liver in this study without contrasts? Look at image 1 (axial section of the abdomen). (Iodine contrast through a vein in the arm). It is the use of CT (computarised tomography) to visualise the large and medium-sized blood vessels in almost any part of the human body, thanks to the use of intravenous contrast.
In most cases, an injection of contrast material is needed to produce images of the main blood vessels of the whole body. Angiography is a barely-invasive medical examination which helps doctors to diagnose and treat illnesses.
0 kommentar(er)
