Follow-up assessment of coiled intracranial aneurysms using zTE MRA as compared with TOF MRA: a preliminary image quality study

Abstract

• Various MRA sequences were applied for follow-up assessment of coiled intracranial aneurysms. • zTE MRA was less sensitive to susceptibility artefacts and haemodynamics. • In this monocentric study, zTE MRA was equivalent to DSA. • zTE MRA maybe an alternative to TOF MRA for follow-up assessment.

Three‐dimensional spin‐echo‐based black‐blood MRA in the detection of vasospasm following subarachnoid hemorrhage

“…with 6 years of experience), blinded to the findings of the posttreatment follow‐up MRA/CTA/DSA, independently reviewed the BBMRA results, and rated the visualization of the aforementioned arterial segments using a 4‐point grading scale: 4, excellent; 3, good; 2, fair; and 1, poor (nondiagnostic). The degree of treatment‐related susceptibility artifacts was also evaluated using 4‐point grading scores: 4, no susceptibility signal loss; 3, mild signal loss; 2, moderate signal loss; 1, severe signal loss that prevented image assessment . Subsequently, the same observers compared BBMRA and the baseline pretreatment DSA/CTA and assessed the presence and degree of vasospasm in each arterial segment using a 3‐point scale: 1 (0–33% stenosis), 2 (34–66% stenosis) and 3 (67–100%) .…”

“…20 Subsequently, the same observers compared BBMRA and the baseline pretreatment DSA/CTA and assessed the presence and degree of vasospasm in each arterial segment using a 3-point scale: 1 (0-33% stenosis), 2 (34-66% stenosis) and 3 (67-100%). 20,21 After the interrater agreement was evaluated, the disagreement was resolved by consensus. For the presence of vasospasm, grades 2 and 3 were considered positive, regardless of the patient's symptoms.…”

Visualization of Aneurysmal Neck and Dome after Coiling with 3D Multifusion Imaging of Silent MRA and FSE-MR Cisternography

“…I n the follow-up after the endovascular treatment of a cerebral aneurysm, the precise visualization of the shape of the neck and dome with/without remnants from coiling is necessary. [1][2][3][4][5][6][7][8][9][10][11] X-ray DSA is a reference standard to examine the above-described configuration, but it is invasive and presents certain risks related to the catheter procedure, contrast media, and radiation. 2,[5][6][7]9,10 As a noninvasive substitute for DSA, 3D TOF-MRA with/without contrast media is widely used, but this method presents some difficulty regarding magnetic susceptibility artifacts from the coils.…”

“…[1][2][3][4][5][6][7][8][9][10][11] X-ray DSA is a reference standard to examine the above-described configuration, but it is invasive and presents certain risks related to the catheter procedure, contrast media, and radiation. 2,[5][6][7]9,10 As a noninvasive substitute for DSA, 3D TOF-MRA with/without contrast media is widely used, but this method presents some difficulty regarding magnetic susceptibility artifacts from the coils. 2,4,5,[7][8][9][10][11] With some recent advances in MR imaging, it has been speculated that silent MRA with zero-TE and arterial spin-labeling tagging may overcome the above problems by delineating flowing blood at the neck with minimal artifacts from metal substances.…”

“…2,[5][6][7]9,10 As a noninvasive substitute for DSA, 3D TOF-MRA with/without contrast media is widely used, but this method presents some difficulty regarding magnetic susceptibility artifacts from the coils. 2,4,5,[7][8][9][10][11] With some recent advances in MR imaging, it has been speculated that silent MRA with zero-TE and arterial spin-labeling tagging may overcome the above problems by delineating flowing blood at the neck with minimal artifacts from metal substances. 2,7,9,10,12 In addition, MR cisternography (MRC) with a heavily T2-weighted 3D FSE sequence can depict the shape of the aneurysmal dome together with perianeurysmal anatomic structures, including the brain parenchyma and cranial nerves.…”