title: Surveillance of intracranial aneurysms treated with detachable coils: a comparison of MRA techniques.
abstract: Two MRA techniques were evaluated for the follow-up of coiled intracranial aneurysms. Twenty-nine coiled aneurysms were evaluated for a total of 36 follow-up assessments using 3D time-of flight MRA (TOF MRA), an auto-triggered elliptic-centric-ordered three-dimensional gadolinium-enhanced MR angiogram (ATECO MRA), as well as a selective digital subtraction angiography (DSA), which served as the "gold standard". Confident visualization was seen in 36 (100%) of ATECO MRAs and in 32 (89%) of the TOF MRAs. Eleven residual aneurysm components (RACs) greater than 2 mm were described on DSA. Of these, nine were seen on ATECO MRA (sensitivity of 81% and specificity of 88%) and four were seen on TOF MRA (sensitivity of 40% and specificity of 90%). The two RACs not seen on ATECO MRA both measured 3 mm. The six RACs not seen on TOF MRA measured 3, 4 and 5 mm. ATECO MRA provides a non-invasive reliable angiogram for the surveillance of coiled aneurysms and is superior to TOF MRA for this purpose.
authors.affiliation: Division of Neuroradiology, Department of Medical Imaging, Toronto Western Hospital, University of Toronto, Ontario, Canada. richard.farb@utoronto.ca
authors.forename: Richard I
authors.initials: RI
authors.lastname: Farb
authors.forename: Shudeshna
authors.initials: S
authors.lastname: Nag
authors.forename: James N
authors.initials: JN
authors.lastname: Scott
authors.forename: Robert A
authors.initials: RA
authors.lastname: Willinsky
authors.forename: Thomas R
authors.initials: TR
authors.lastname: Marotta
authors.forename: Walter J
authors.initials: WJ
authors.lastname: Montanera
authors.forename: George
authors.initials: G
authors.lastname: Tomlinson
authors.forename: Karel G
authors.initials: KG
authors.lastname: Terbrugge
mesh_terms: D000328:Adult; D000368:Aged; D015901:Angiography, Digital Subtraction; D004621:Embolization, Therapeutic / Q000295:instrumentation*; D005260:Female; D005682:Gadolinium; D006801:Humans; D002532:Intracranial Aneurysm / Q000175:diagnosis* / Q000628:therapy*; D018810:Magnetic Resonance Angiography / Q000379:methods* / Q000592:standards; D008297:Male; D008875:Middle Aged; D011159:Population Surveillance / Q000379:methods*; D012680:Sensitivity and Specificity
chemical_list: D005682:Gadolinium