Author/Editor		Berden, Pavel
Title		Magnetic resonance of the thoracic aortic disease
Translated title		Magnetna resonanca pri obolenjih torakalne aorte
Type		članek
Source		Radiol Oncol
Vol. and No.		Letnik 34, št. 2
Publication year		2000
Volume		str. 159-64
Language		eng
Abstract		Conventional ECG gated spin-echo (SE) magnetic resonance imaging (MR) and magnetic resonance angiography (MRA) are excellent methods for diagnosing thoracic aortic disease. SE image provides a good spatial resolution for defining aortic anatomy and relationships to adjacent tissues. MRA shows flow but temporal resolution is inferior to conventional MR images. Contrast-enhanced 3D (three-dimensional) MRA is very accurate for defining thoracic aortic anatomy and is particularly good for defining branch vessel abnormality. The sensitivity and specificity for diagnosing aortic dissection are the highest in comparison to other modalities (echocardiography, CT angiography) and range from 95% to 100% and 94% to 100%, respectively. MR can define clearly the full diameter of aortic aneurysm and also shows the amount of thrombi within it and its craniocaudal extent. A combination of SE and cine MRA is usually necessary. The same sequence with contrast enhancement provides all the required information on the congenital abnormalities of the aorta. MR is very reliable in congenital aortic abnormalities, aortic aneurysm and aortic dissection in hemodynamically stable patients. It should be used for all chronic thoracic aortic disease and postsurgical follow-up. Unstable patients that need intensive hemodynamic monitoring are unsuitable for MR.
Summary		Običajna, z EKG vodena spin-echo (SE) magnetna resonanca (MR) in magnetno resonančna angiografija (MRA) sta odlični slikovni metodi v diagnostiki obolenj torakalne aorte. SE nudi dobro prostorsko ločljivost, ki omogoča prikaz anatomije aorte in odnos do okolnih tkiv. MRA pokaže pretok, vendar je ločljivost slabša od običajne MR. 3D (tri dimenzionalna) MRA s kontrastnim sredstvom je zelo zanesljiva pri prikazu aortne anatomije, predvsem pa pri ugotavljanju nepravilnosti njenih vej. Občutljivost in specifičnost ugotavljanja aortne disekcije se gibljeta od 95% do 100% oziroma 94% do 100% in sta največji v primerjavi z drugimi slikovnimi tehnikami (ultrazvok, CT angiografija-CTA). MR jasno pokaže celoten premer aortne anevrizme, velikost tromba v njej in njeno širitev v trebušno votlino. Običajno je potrebna kombinacija SE in kino MRA. Enake sekvence s kontrastnim sredstvom nudijo tudi vse potrebne podatke pri prirojenih nepravilnostih aorte. MR je zelo zanesljiva pri prirojenih nepravilnostih aorte, aortnih anevrizmah in disekcijah pri hemodinamsko stabilnih bolnikih. Uporabiti jo velja pri vseh kroničnih aortnih disekcijah in pooperativnem sledenju bolnika. Nestabilni bolniki, ki potrebujejo intenziven monitoring za MR niso primerni.
Descriptors		AORTIC DISEASES AORTA, THORACIC MAGNETIC RESONANCE IMAGING MAGNETIC RESONANCE ANGIOGRAPHY SENSITIVITY AND SPECIFICITY ANEURYSM, DISSECTING AORTIC ANEURYSM, THORACIC THROMBOSIS FOLLOW-UP STUDIES TREATMENT OUTCOME ECHOCARDIOGRAPHY CONTRAST MEDIA AORTIC RUPTURE