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Source: American Journal of Neuroradiology
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Total 333 results found since Jan 2013.

Impact of Balloon-Guiding Catheter Location on Recanalization in Patients with Acute Stroke Treated by Mechanical Thrombectomy INTERVENTIONAL
CONCLUSIONS: Location of the balloon-guiding catheter has a significant impact on recanalization in patients with acute stroke. The balloon-guiding catheter should be positioned as distally as safely possible in the cervical ICA for maximally effective thrombectomy.
Source: American Journal of Neuroradiology - May 14, 2019 Category: Radiology Authors: Jeong, D. E., Kim, J. W., Kim, B. M., Hwang, W., Kim, D. J. Tags: INTERVENTIONAL Source Type: research

Comparison of Iterative Model Reconstruction versus Filtered Back-Projection in Pediatric Emergency Head CT: Dose, Image Quality, and Image-Reconstruction Times PEDIATRICS
CONCLUSIONS: In children referred for emergency noncontrast head CT, optimized low-dose protocols with iterative model reconstruction allowed us to significantly reduce the relative dose, on average, 22% compared with filtered back-projection, with significantly improved objective and subjective image quality.
Source: American Journal of Neuroradiology - May 14, 2019 Category: Radiology Authors: Southard, R. N., Bardo, D. M. E., Temkit, M. H., Thorkelson, M. A., Augustyn, R. A., Martinot, C. A. Tags: PEDIATRICS Source Type: research

Risk of Acute Kidney Injury with Consecutive, Multidose Use of Iodinated Contrast in Patients with Acute Ischemic Stroke PATIENT SAFETY
SUMMARY: Currently, CTA is the imaging technique most frequently used to evaluate acute ischemic stroke, and patients with intracranial large-vessel occlusion usually undergo endovascular treatment. This single-center, prospective, cohort study showed that consecutive, multidose use of contrast during CTA and DSA does not increase the incidence of acute kidney injury in patients with acute ischemic stroke, though acute kidney injury tended to have a higher incidence in the contrast multiexposure group (P = .172).
Source: American Journal of Neuroradiology - April 10, 2019 Category: Radiology Authors: Jia, Z. Y., Wang, S. X., Zhao, L. B., Cao, Y. Z., Shi, H. B., Liu, S. Tags: PATIENT SAFETY Source Type: research

Metallic Hyperdensity Sign on Noncontrast CT Immediately after Mechanical Thrombectomy Predicts Parenchymal Hemorrhage in Patients with Acute Large-Artery Occlusion INTERVENTIONAL
CONCLUSIONS: The presence of the metallic hyperdensity sign on noncontrast CT performed immediately after mechanical thrombectomy in patients with large-vessel occlusion could predict the occurrence of parenchymal hemorrhage at 24 hours, which might be helpful in postinterventional management within 24 hours after mechanical thrombectomy.
Source: American Journal of Neuroradiology - April 10, 2019 Category: Radiology Authors: Xu, C., Zhou, Y., Zhang, R., Chen, Z., Zhong, W., Gong, X., Ding, X., Lou, M. Tags: INTERVENTIONAL Source Type: research

Flow Patterns in Carotid Webs: A Patient-Based Computational Fluid Dynamics Study EXTRACRANIAL VASCULAR
CONCLUSIONS: Carotid webs are associated with increased recirculation zones and regional increased wall shear stress metrics that are associated with disturbed flow. These findings suggest that a carotid web might stimulate thrombus formation, which increases the risk of acute ischemic stroke.
Source: American Journal of Neuroradiology - April 10, 2019 Category: Radiology Authors: Compagne, K. C. J., Dilba, K., Postema, E. J., van Es, A. C. G. M., Emmer, B. J., Majoie, C. B. L. M., van Zwam, W. H., Dippel, D. W. J., Wentzel, J. J., van der Lugt, A., Gijsen, F. J. H., for the MR CLEAN investigators Tags: EXTRACRANIAL VASCULAR Source Type: research

Aqueductal CSF Stroke Volume Is Increased in Patients with Idiopathic Normal Pressure Hydrocephalus and Decreases after Shunt Surgery ADULT BRAIN
CONCLUSIONS: Aqueductal CSF stroke volume was increased in patients with idiopathic normal pressure hydrocephalus and decreased after shunt surgery, whereas retrograde aqueductal net flow did not seem to be specific for patients with idiopathic normal pressure hydrocephalus. On the basis of the results, the usefulness of CSF flow parameters to predict outcome after shunt surgery seem to be limited.
Source: American Journal of Neuroradiology - March 13, 2019 Category: Radiology Authors: Shanks, J., Markenroth Bloch, K., Laurell, K., Cesarini, K. G., Fahlström, M., Larsson, E.- M., Virhammar, J. Tags: ADULT BRAIN Source Type: research

Predictors and Clinical Impact of Delayed Stent Thrombosis after Thrombectomy for Acute Stroke with Tandem Lesions INTERVENTIONAL
CONCLUSIONS: We observed a non-negligible rate of delayed stent thrombosis with significant negative impact on clinical outcome. Future studies should systematically measure and report stent patency rates.
Source: American Journal of Neuroradiology - March 13, 2019 Category: Radiology Authors: Pop, R., Zinchenko, I., Quenardelle, V., Mihoc, D., Manisor, M., Richter, J. S., Severac, F., Simu, M., Chibbaro, S., Rouyer, O., Wolff, V., Beaujeux, R. Tags: INTERVENTIONAL Source Type: research

A Deep Learning-Based Approach to Reduce Rescan and Recall Rates in Clinical MRI Examinations ADULT BRAIN
CONCLUSIONS: Fast, automated deep learning–based image-quality rating can decrease rescan and recall rates, while rendering them technologist-independent. It was estimated that decreasing rescans and recalls from the technologists' values to the values of deep learning could save hospitals $24,000/scanner/year.
Source: American Journal of Neuroradiology - February 13, 2019 Category: Radiology Authors: Sreekumari, A., Shanbhag, D., Yeo, D., Foo, T., Pilitsis, J., Polzin, J., Patil, U., Coblentz, A., Kapadia, A., Khinda, J., Boutet, A., Port, J., Hancu, I. Tags: ADULT BRAIN Source Type: research

Clinical Outcome after Thrombectomy in Patients with Stroke with Premorbid Modified Rankin Scale Scores of 3 and 4: A Cohort Study with 136 Patients INTERVENTIONAL
CONCLUSIONS: Good outcome in patients with premorbid mRS 3 and 4 is less frequent compared with premorbid mRS 0–2. Nevertheless, about 20% of the patients return to their premorbid mRS, which may justify endovascular treatment. The most important predictor of good outcome is successful recanalization.
Source: American Journal of Neuroradiology - February 13, 2019 Category: Radiology Authors: Seker, F., Pfaff, J., Schönenberger, S., Herweh, C., Nagel, S., Ringleb, P. A., Bendszus, M., Möhlenbruch, M. A. Tags: INTERVENTIONAL Source Type: research

Transient Ischemic Attack and Carotid Web EXTRACRANIAL VASCULAR
CONCLUSIONS: The incidence of carotid web in patients with TIA was 8.9%. There is an association between carotid web and patients with TIA without other identified risks. Carotid web may be an underestimated risk factor for TIA.
Source: American Journal of Neuroradiology - February 13, 2019 Category: Radiology Authors: Hu, H., Zhang, X., Zhao, J., Li, Y., Zhao, Y. Tags: EXTRACRANIAL VASCULAR Source Type: research

Two-Layered Susceptibility Vessel Sign and High Overestimation Ratio on MRI Are Predictive of Cardioembolic Stroke ADULT BRAIN
SUMMARY: In a prospective study among patients in the THRombectomie des Artères Cerebrales trial, we analyzed the diagnostic accuracy of 2 imaging biomarkers, the 2-layered susceptibility vessel sign and a high overestimation ratio, obtained on pretreatment brain T2* sequences, to identify cardioembolic stroke etiology (107/260 patients). In combination, these 2 biomarkers, on 1.5T or 3T systems (159 and 101 patients, respectively), demonstrated high specificity (0.77 at 1.5T and 1 at 3T) and their simultaneous presence is highly associated with cardioembolism.
Source: American Journal of Neuroradiology - January 11, 2019 Category: Radiology Authors: Bourcier, R., Derraz, I., Bracard, S., Oppenheim, C., Naggara, O., on behalf of the THRACE Investigators Tags: ADULT BRAIN Source Type: research

Differentiation of Hemorrhage from Iodine Using Spectral Detector CT: A Phantom Study ADULT BRAIN
CONCLUSIONS: Spectral detector CT can accurately differentiate blood from iodinated contrast in a phantom setting.
Source: American Journal of Neuroradiology - December 14, 2018 Category: Radiology Authors: Van Hedent, S., Hokamp, N. G., Laukamp, K. R., Buls, N., Kessner, R., Rose, B., Ros, P., Jordan, D. Tags: ADULT BRAIN Source Type: research

Abnormal Cerebral Perfusion Profile in Older Adults with HIV-Associated Neurocognitive Disorder: Discriminative Power of Arterial Spin-Labeling FUNCTIONAL
CONCLUSIONS: This study found specific CBF patterns associated with HIV status despite viral suppression—data that should animate further investigations into the pathobiologic basis of vascular and cognitive abnormalities in HIV-associated neurocognitive disorders.
Source: American Journal of Neuroradiology - December 14, 2018 Category: Radiology Authors: Narvid, J., McCoy, D., Dupont, S. M., Callen, A., Tosun, D., Hellmuth, J., Valcour, V. Tags: FUNCTIONAL Source Type: research

Does Phase-Contrast Imaging through the Cerebral Aqueduct Predict the Outcome of Lumbar CSF Drainage or Shunt Surgery in Patients with Suspected Adult Hydrocephalus? ADULT BRAIN
CONCLUSIONS: This study suggests that the results of phase-contrast MR imaging through the cerebral aqueduct alone should not be used to select patients for diagnostic or therapeutic CSF diversion.
Source: American Journal of Neuroradiology - December 14, 2018 Category: Radiology Authors: Blitz, A. M., Shin, J., Baledent, O., Page, G., Bonham, L. W., Herzka, D. A., Moghekar, A. R., Rigamonti, D. Tags: ADULT BRAIN Source Type: research

MR Imaging for Differentiating Contrast Staining from Hemorrhagic Transformation after Endovascular Thrombectomy in Acute Ischemic Stroke: Phantom and Patient Study ADULT BRAIN
CONCLUSIONS: According to our preliminary results, contrast staining might be differentiated from hemorrhagic transformation using an immediate postinterventional DWI protocol including gradient recalled-echo sequences. It might be possible to expedite establishment of postinterventional medical treatment strategy.
Source: American Journal of Neuroradiology - December 14, 2018 Category: Radiology Authors: You, S.- H., Kim, B., Kim, B. K., Suh, S.- i. Tags: ADULT BRAIN Source Type: research