Author/Editor		Aschauer, Manuela Adelinde; Stollberger, Rudolf; Ebner, Franz
Title		Advances in contrast-enhanced MR-angiography: indications and limitations
Translated title		Napredki v s kontrastom ojačani MR-angiografiji: indikacije in omejitve
Type		članek
Source		Radiol Oncol
Vol. and No.		Letnik 36, št. 2
Publication year		2002
Volume		str. 103-8
Language		eng
Abstract		Introduction. Gadolinium(Gd)-enhanced three-dimensional (3D) magnetic resonance angiography (MRA) is a newer technique that provides high resolution data rapidly for depiction of both arteries and veins throughout the body. Conclusions. Contrast-enhanced 3D MRA represents a milestone for non-invasive vascular imaging. While its clinical utility has already been established in many vascular territories, the continuos development of hard- and software, as well as of new contrast agents, will likely result in a further widening in the spectrum of indications. Delayed 3D acquisitions of the kidney, ureters and bladder can be performed routinely to demonstrate and characterise obstruction, delayed function, filling defects and masses. Some patients are not candidates for MRA because of pacemakers, some kind of stents or immobilisation coils that cause considerable artifacts and obscure important structures. The resolution of CE-3D-MRA is lower compared with that of conventional angiography and visualisation of small peripheral arteries is limited.
Summary		Izhodišča. Z gadolinium(Gd)-ojačana tri-dimenzionalna (3D) magnetno resonančna angiografija (MRA) je novejša tehnika, s katero hitro dobimo podatke visoke ločljivosti tako za prikaz arterij kot ven v celem telesu. Zaključki. S kontrastom ojačana 3D MRA predstavlja mejnik za neinvaziven slikovni prikaz žilja. Metem, ko je bila klinična uporabnost 3D MRA že dokazana v številnih področjih žilne diagnostike, bo stalen razvoj strojne in programske opreme, kakor tudi novih kontrastnih sredstev pripeljal do nadaljnega širjenja indikacij. Rutinsko lahko opravljamo 3D prikaz ledvic, ureterjev in mehurja, s čimer lahko prikažemo in ocenimo zaporo, zapoznelo funkcijo, polnitvene defekte in mase v predelu ledvic. Bolniki z vzpodbujevalniki srca, niso primerni za preiskavo z MRA, nekatere vrste endoprotez in imobilizacijskih sredstev pa povzročajo pomembne artefakte, ki skrijejo pomembne. Ločljivost CE-3D-MRA je nižja v primerjavi z konvencionalno angiografijo, omejena pa je tudi ločljivost majhnih perifernih arterij.
Descriptors		MAGNETIC RESONANCE IMAGING CONTRAST MEDIA GADOLINIUM PULMONARY ARTERY AORTA PERIPHERAL VASCULAR DISEASES VEINS