3D MR Cisternography to Identify Distal Dural Rings: Comparison of 3D-CISS and 3D-SPACE Sequences

Abstract

Purpose: The distal dural ring (DDR) is an anatomical landmark used to distinguish intra-and extradural aneurysms. We investigated identiˆcation of the DDR using 2 threedimensional (3D) magnetic resonance (MR) cisternography sequences-3D constructive interference in steady state (CISS) and 3D sampling perfection with application optimized contrasts using diŠerent ‰ip angle evolutions (SPACE)-at 3.0 tesla.Methods: Ten healthy adult volunteers underwent imaging with 3D-CISS, 3D-SPACE, and time-of-‰ight (TOF) MR angiography (TOF-MRA) sequences at 3.0T. We analyzed DDR identiˆcation and internal carotid artery (ICA) signal intensity and classiˆed the shape of the carotid cave.Results: We identiˆed the DDR using both 3D-SPACE and 3D-CISS, with no signiˆcant diŠerence between the sequences. Visualization of the outline of the ICA in the cavernous sinus (CS) was signiˆcantly clearer with 3D-SPACE than 3D-CISS. In the CS and petrous portions, signal intensity was lower with 3D-SPACE, and the ‰ow void was poor with 3D-CISS in some subjects.Conclusion: We identiˆed the DDR with both 3D-SPACE and 3D-CISS, but the superior contrast of the ICA in the CS using 3D-SPACE suggests the superiority of this sequence for evaluating the DDR.

Evaluation of Aqueductal Stenosis by 3D Sampling Perfection with Application-Optimized Contrasts Using Different Flip Angle Evolutions Sequence: Preliminary Results with 3T MR Imaging

“…3,6,16 However, these techniques have their own advantages and disadvantages. 5,19,20 For instance, PC-MRI can provide physiologic information about CSF flow; however, it might fail in case of complex flow or vascular pulsations.…”

“…With this flexible sequence; T1-weighted, T2-weighted, proton-attenuation, or FLAIR images can be obtained. 20 The advantages of the 3D-SPACE sequence in evaluation of the spine, pelvis, and abdomen have been reported previously. 8,12 3D-SPACE sequence uses different flip angles, which enable a low specific absorption rate value, therefore obtaining good T2-weighted images.…”

Intrathecal Gadolinium-Enhanced MR Cisternography: A Comprehensive Review

“…[7][8][9][10] High contrast-to-noise ratio, multiplanar evaluation of volumetric data, and thin-section image acquisition are the main advantages of NCE-MRC. 11 Moreover, it is noninvasive, and it does not require radiation exposure or intrathecal contrast material administration. 4 Although NCE-MRC has several advantages, it can only provide morphologic information different from that in other cisternographic studies.…”

“…Intrathecal Gd injection is not approved by the FDA, though its safety has been reported in several pilot studies in Europe. [2][3][4]6,[9][10][11][12][13][14] Tolerance and dose limits of intrathecal Gd injection were established in animal model studies, and different Gd compounds (eg, gadodiamide, gadobenate dimeglumine, and Gd-DTPA) were compared in different experimental animal protocols. 5,[14][15][16][17] High-dose intraventricular Gd injection was reported to result in behavioral and neurologic disturbances (focal seizures, ataxia, latent tremor) with histopathologic changes (loss of oligodendroglia, astrocytic hypertrophy, and eosinophilia); on the other hand, it was concluded that these changes and distur-bance did not occur if the total injected dose wasϽ15 mL (3.3 mmol/g).…”

Potential of 80-kV high-resolution cone-beam CT imaging combined with an optimized protocol for neurological surgery

“…For MRI, imaging methods using the fusion of noncontrast and the contrast interference in steady state (CISS) method and MRA, contrasted 3D-MRA, and contrasted 3D-CISS have been reported. Additionally, studies of 3D-SPACE (sampling perfection with applicationoptimized contrast using different flip angle evolutions) sequences, T2 turbo-spin echo sequences, and noncontrasted 3D time-of-flight (TOF) by 3T MRI with high signal-to-noise (S/N) ratios have been conducted [16][17][18][19][20]. However, these imaging methods show the DDR indirectly.…”