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Available online 3 April 2018
Brain CT perfusion improves intracranial vessel occlusion detection on CT angiography
Publication date: Available online 3 April 2018
Source:Journal of Neuroradiology Author(s): Marinus J. Becks, Rashindra Manniesing, Jeroen Vister, Sjoert A.H. Pegge, Stefan C.A. Steens, Ewoud J. van Dijk, Mathias Prokop, Frederick J.A. Meijer Background and purpose To evaluate whether brain CT perfusion (CTP) aids in the detection of intracranial vessel occlusion on CT angiography (CTA) in acute ischemic stroke. Materials and methods Medical-ethical committee approval of our hospital was obtained and informed consent was waived. Patients suspected of acute ischemic stroke who underwent non-contrast CT(NCCT), CTA and whole-brain CTP in our center in the year 2015 were included. Three observers with different levels of experience evaluated the imaging data of 110 patients for the presence or absence of intracranial arterial vessel occlusion with two strategies. In the first strategy, only NCCT and CTA were available. In the second strategy, CTP maps were provided in addition to NCCT and CTA. Receiver-operating-characteristic (ROC) analysis was used for the evaluation of diagnostic accuracy. Results Overall, a brain perfusion deficit was scored present in 87–89% of the patients with an intracranial vessel occlusion, more frequently observed in the anterior than in the posterior circulation. Performance of intracranial vessel occlusion detection on CTA was significantly improved with the availability of CTP maps as compared to the first strategy (P =0.023), due to improved detection of distal and posterior circulation vessel occlusions (P-values of 0.032 and 0.003 respectively). No added value of CTP was found for intracranial proximal vessel occlusion detection, with already high accuracy based on NCCT and CTA alone. Conclusion The performance of intracranial vessel occlusion detection on CTA was improved with the availability of brain CT perfusion maps due to the improved detection of distal and posterior circulation vessel occlusions.
Available online 3 April 2018
Experimental evaluation of the NeVa™ thrombectomy device a novel stent retriever conceived to improve efficacy of organized clot removal
Publication date: Available online 3 April 2018
Source:Journal of Neuroradiology Author(s): Paolo Machi, Arthur J. Ulm, Gianmarco Bernava, Olivier Brina, Karl Olof Lovblad, Franck Jourdan Background and purpose Stent retrievers are recognized as the most effective devices for intracranial thrombectomy. Although highly effective, such devices fail in clot removal when the brain vessel occlusion is due to organized, firm clots. The mechanism of failure is that during the retrieval, devices remain compressed by the organized clot and slide between it and the vessel wall without any removal effect. The aim of the current study is to present the preclinical evaluation of the Neva™ device, a novel stent retriever designed to improve the incorporation and removal of organized thrombi. Materials and methods Preclinical evaluation of the Neva™ device was divided in three main chapters: efficacy analysis, mechanical analysis and safety analysis. Efficacy and mechanical analysis aimed to investigate the behavior during the retrieval of the Neva™ device and its interaction with experimental organized clots. Safety analysis was conducted on animals in order to investigate the effect of the Neva™ device on real arteries after simulated thrombectomy maneuvers. Results Neva™ device showed a high rate of “optimal clot integration” and “effective clot removal” which was related to constant cohesion to the vessel wall during retrievals. Safety analysis showed as the most frequent finding the disruption of the intima of the tested vessels with, in some cases, minimal disruption of the internal elastic lamina. Conclusions The Neva™ device has demonstrated safety and efficacy in a pre-clinical study. Such encouraging, preliminary results have to be compared with those of clinical trials.
Available online 28 March 2018
Speculation on the naming of Moyamoya disease – Letter to the Editor
Publication date: Available online 3 April 2018
Source:Journal of Neuroradiology Author(s): Mari Mori, Naoko Kurokawa, Gordon Worley
Available online 28 March 2018
Characteristic phase distribution in the white matter of infants on phase difference enhanced imaging
Publication date: Available online 28 March 2018
Source:Journal of Neuroradiology Author(s): Tesu Niwa, Tetsuya Yoneda, Masaharu Hayashi, Keiji Suzuki, Shuhei Shibukawa, Takashi Okazaki, Yutaka Imai Background and purpose The infantile brain is continuously undergoing development. Non-invasive methods to assess the neurological development of infants are important for the early detection of abnormalities. Some microstructures in the brain have been demonstrated via phase difference-enhanced imaging (PADRE), which may reflect myelin-related microstructures. We aimed to assess the white matter (WM) signal distribution in infants using PADRE and compared it with that using T1-weighted images (T1WI) and diffusion tensor imaging (DTI) on magnetic resonance imaging (MRI). Materials and method This study included 18 infants (postmenstrual age at MRI, 37–40 weeks) without abnormal findings on MRI. Signal distribution using T1WI, a fractional anisotropy (FA) map and PADRE was assessed regarding the following intraparenchymal structures: the optic radiation (OR), internal capsule (IC), corpus callosum, corticospinal tract (CST), semiovale center and subcortical regions. Results We found that the signal distribution was significantly different (P <0.001) with a relatively large signal change found at the IC and CST across the three imaging methods. Signal changes were also greater at the OR and rolandic subcortical WM on PADRE, whereas these were smaller on T1WI and FA. Conclusion PADRE demonstrated a characteristic phase shift distribution in infantile WM, which was different from that observed on T1WI and FA maps, and may demonstrate the developing myelin-related structures. PADRE can be a unique indicator of infantile brain development.
Available online 12 March 2018
Effect of blood T1 estimation strategy on arterial spin labeled cerebral blood flow quantification in children and young adults with kidney disease
Publication date: Available online 28 March 2018
Source:Journal of Neuroradiology Author(s): Hua-Shan Liu, Abbas F. Jawad, Nina Laney, Erum A. Hartung, Susan L. Furth, John A. Detre Purpose To compare blood T1 estimation approaches used for quantifying cerebral blood flow (CBF) with arterial spin labeled (ASL) perfusion MRI in a developmental cohort of chronic kidney disease (CKD) patients with anemia and a control group. Methods 61 patients with CKD and 47 age-matched control subjects were studied. Blood T1 approaches included: (1) a fixed value, (2) estimation based on measured hematocrit (Hct), and (3) estimation based on Age+Sex using a published formula. Resulting T1 and CBF values were compared along with group, age and sex effects. Results Highly significant group differences in CBF using fixed blood T1 were reduced when Hct-corrected blood T1 was used, and were eliminated entirely when using the Age+Sex estimated approach. In the control cohort, fixed T1 method showed the strongest correlations of CBF with age and sex. Hct-corrected T1 preserved a significant correlation between CBF and age and sex, while Age+Sex estimated T1 produced a poor fit of CBF with age and sex. Conclusions Blood T1 estimation method can confound the interpretation of CBF changes measured using ASL MRI in patients with CKD. Blood T1 should ideally be corrected for hematocrit effects in clinical populations with anemia.
Available online 7 March 2018
Evaluation of safety, efficacy and clinical outcome after endovascular treatment of aneurysmal subarachnoid hemorrhage in coil-first setting. A 10-year series from a single center
Publication date: Available online 12 March 2018
Source:Journal of Neuroradiology Author(s): Muhammad AlMatter, Pervinder Bhogal, Marta Aguilar P
Available online 7 March 2018
CT angiography for one-year follow-up of intracranial aneurysms treated with the WEB device: Utility in evaluating aneurysm occlusion and WEB compression at one year
Publication date: Available online 7 March 2018
Source:Journal of Neuroradiology Author(s): H
Available online 7 March 2018
Objective evaluation of cerebrovascular reactivity for acetazolamide predicts cerebral hyperperfusion after carotid artery stenting: Comparison with region of interest methods
Publication date: Available online 7 March 2018
Source:Journal of Neuroradiology Author(s): Kouichi Misaki, Naoyuki Uchiyama, Anri Inaki, Seigo Kinuya, Iku Nambu, Tomoya Kamide, Masanao Mohri, Yasuhiko Hayashi, Mitsutoshi Nakada Background and purpose Hemodynamic impairments are considered risk factors of cerebral hyperperfusion after carotid artery stenting (CAS); measurement by Single-photon emission computed tomography (SPECT) using a subjective region of interest (ROI) method lacks consistency and reproducibility. Materials and methods The present study compared objective perfusion analysis (stereotactic extraction estimation [SEE] method) with the ROI method for preoperative SPECT to predict the hyperperfusion phenomenon (HPP) after CAS. Preoperative resting asymmetry index (cerebral blood flow [CBF] ratio from the affected to unaffected hemisphere) and cerebrovascular reactivity (CVR) to acetazolamide were measured by N-isopropyl-p-[123I]-iodoamphetamine SPECT using the SEE and ROI method in 84 patients. CBF was also measured the day after CAS. Perfusion data with the highest area under the curve (AUC) by receiver-operating characteristic (ROC) analysis was considered a perfusion risk factor of HPP. Multivariate analyses for clinical characteristics and perfusion risk factors were performed to determine predictors of HPP. Results The HPP was observed in 10 patients (11.9%). Female sex, contralateral stenosis, and degree of stenosis were significantly associated with HPP development on univariate analysis, and symptomatic stenosis was not found to be a significant factor. On SPECT analysis, CVR in the MCA area by SEE method had the highest AUC (0.981). Multivariate analysis showed that CVR in the MCA area was a significant predictor of HPP (P =0.041). To predict hyperperfusion, the ROC curve of the CVR showed a cutoff value of –0.60%, sensitivity of 94.6%, and specificity of 100% (P <0.001). Conclusions Objective SEE method had better a predictive capability than ROI method to identify risk of hyperperfusion after CAS.
Available online 2 March 2018
Postoperative in-stent protrusion is an important predictor of perioperative ischemic complications after carotid artery stenting
Publication date: Available online 7 March 2018
Source:Journal of Neuroradiology Author(s): Mikiya Beppu, Yohei Mineharu, Hirotoshi Imamura, Hidemitsu Adachi, Chiaki Sakai, Shoichi Tani, Koichi Arimura, So Tokunaga, Nobuyuki Sakai Background and purpose Although in-stent protrusion is a potential risk factor for thromboembolism following carotid artery stenting, the correlation between in-stent protrusion and postoperative ipsilateral stroke has not been well examined. Materials and methods We retrospectively reviewed 342 consecutive carotid artery lesions in 319 patients who underwent carotid artery stenting between April 2008 and April 2015. After excluding cases with carotid artery dissection and acute occlusion, 301 lesions in total of 277 patients were included in the analysis. We examined the association between in-stent protrusion, which was detected by intravascular ultrasound, and postoperative ipsilateral stroke within 30 days. Results In-stent protrusion was observed in 47 (15.6%) lesions, of which postoperative ipsilateral stroke within 30 days occurred with 4 (8.5%) lesions. All these events occurred within 10 days after treatment. On the other hand, only 1 (0.39%) of the 256 lesions without in-stent protrusion showed this symptom, and the event occurred at 30days after treatment. Thus, lesions with in-stent protrusion had a higher cumulative risk of ipsilateral stroke than those without in-stent protrusion (8.5% vs 0.4% at 30 days, log-rank P < 0.001). In-stent protrusion, which was more often seen in symptomatic lesions, was associated with a vulnerable plaque assessed by MRI. After adjustment for postoperative stroke risks such as symptomatic lesions, plaque vulnerability, age or sex, in-stent protrusion was still significantly associated with postoperative ipsilateral stroke within 30 days (OR = 27.03, P = 0.001). Conclusions Postoperative ipsilateral stroke was observed more frequently in patients with demonstrated in-stent protrusion (ISP) following CAS.
Available online 2 March 2018
Radiotherapy in acromegaly: Long-term brain parenchymal and vascular magnetic resonance changes
Publication date: Available online 2 March 2018
Source:Journal of Neuroradiology Author(s): Laura Milanese, Chiara Martini, Carla Scaroni, Francesca Dassie, Filippo Ceccato, Alessandro Della Puppa, Luca Denaro, Giulia Bommarito, Valentina Citton, Mario Ermani, Pietro Maffei, Renzo Manara Background Radiation therapy (RT) effectiveness on hormonal reduction is proven in acromegaly; however, collateral long-term effects are still undetermined. This transversal neuroimaging study on a large cohort of acromegalic patients aimed to investigate the rate of parenchymal and vascular changes after RT. Materials and methods Thirty-six acromegalic patients underwent RT (RT+) after unsuccessful surgery and were compared to RT
Available online 2 March 2018
Historadiological correlations in high-grade glioma with the histone 3.3 G34R mutation
Publication date: Available online 2 March 2018
Source:Journal of Neuroradiology Author(s): Julien Puntonet, Volodia Dangouloff-Ros, Rapha
Available online 2 March 2018
Evaluation of prospective motion correction of high-resolution 3D-T2-FLAIR acquisitions in epilepsy patients
Publication date: Available online 2 March 2018
Source:Journal of Neuroradiology Author(s): Sjoerd B. Vos, Caroline Micallef, Frederik Barkhof, Andrea Hill, Gavin P. Winston, Sebastien Ourselin, John S. Duncan T2-FLAIR is the single most sensitive MRI contrast to detect lesions underlying focal epilepsies but 3D sequences used to obtain isotropic high-resolution images are susceptible to motion artefacts. Prospective motion correction (PMC) – demonstrated to improve 3D-T1 image quality in a pediatric population – was applied to high-resolution 3D-T2-FLAIR scans in adult epilepsy patients to evaluate its clinical benefit. Coronal 3D-T2-FLAIR scans were acquired with a 1mm isotropic resolution on a 3T MRI scanner. Two expert neuroradiologists reviewed 40 scans without PMC and 40 with navigator-based PMC. Visual assessment addressed six criteria of image quality (resolution, SNR, WM-GM contrast, intensity homogeneity, lesion conspicuity, diagnostic confidence) on a seven-point Likert scale (from non-diagnostic to outstanding). SNR was also objectively quantified within the white matter. PMC scans had near-identical scores on the criteria of image quality to non-PMC scans, with the notable exception that intensity homogeneity was generally worse. Using PMC, the percentage of scans with bad image quality was substantially lower than without PMC (3.25% vs. 12.5%) on the other five criteria. Quantitative SNR estimates revealed that PMC and non-PMC had no significant difference in SNR (P =0.07). Application of prospective motion correction to 3D-T2-FLAIR sequences decreased the percentage of low-quality scans, reducing the number of scans that need to be repeated to obtain clinically useful data.
March 2018
Reduced brain volumes in children of women with epilepsy: A neuropsychological and voxel based morphometric analysis in pre-adolescent children
Publication date: Available online 2 March 2018
Source:Journal of Neuroradiology Author(s): R.M. Sreedharan, R. Sheelakumari, K.M. Anila, C. Kesavadas, S.V. Thomas Background and purpose Children of Women with Epilepsy with antenatal exposure to antiepileptic drugs (CAED) have reduced neuropsychological functions. We aimed to explore the anatomical basis for this impairment by comparing the brain volumes of CAED with that of matched healthy children without antenatal AED exposure (COAED). Materials and methods CAED aged 8–12 years were recruited from the Kerala Registry of epilepsy and pregnancy that prospectively follows up children of women with epilepsy and COAED from children attending the imaging department for minor illnesses. Maternal clinical details and the neuropsychological data including IQ of CAED and COAED were obtained. Total intracranial volume (TBV), grey matter volume (GMV), white matter volume (WMV) and volumes of deep grey matter were measured by Voxel Based Morphometry. Results We studied 30 CAED (mean age 10.8+1.11 years) and 35 COAED (mean age 10.64+1.26). The antenatal AED exposure for the CAED was monotherapy for 8 children and polytherapy for 22 children. The CAED had significantly lower (P <0.001) IQ (77.5+13.8), TBV(1259.55±169.85mL) and GMV (672.51±85.42 mL) compared to the IQ (87.0+13.5), TBV(1405.37±161mL) and GMV (745.427±86.69 mL) of COAED. CAED had lower volumes for Lt Inferior Triangular Gyrus, and hippocampi on both sides, when compared to COAED. Group analysis CAED showed less GMV (P <0.05) for left inferior and middle frontal gyri relative to COAED. Conclusions These observations point towards an anatomical basis of lower GMV for the lower neuropsychological functions in children with antenatal AED exposure.
March 2018
Editorial Board
Publication date: March 2018
Source:Journal of Neuroradiology, Volume 45, Issue 2

March 2018
Programme des 45e Journ
March 2018
45e Congr
March 2018
Complications du traitement endovasculaire des an
March 2018
Existe-t-il un b
March 2018
Impact de l’hypnoanalg
March 2018
Incidence et pr
March 2018
La modification de forme du dispositif WEB influence-t-elle l’
March 2018
Facteurs pr
March 2018
Protocole IRM
March 2018
Efficacit
March 2018
Effet des anti-angiog
March 2018
Efficacy and safety of ticagrelor versus clopidogrel associated with aspirin for dual antiplatelet therapy in cerebral aneurysm stenting treatment: Monocentric cohort experience
Publication date: March 2018
Source:Journal of Neuroradiology, Volume 45, Issue 2 Author(s): Maxime Cazayus, Jerome Berge, Gaultier Marnat, Patrice Menegon, Florent Gariel, Vincent Dousset, Xavier Barreau Background and purpose Adverse events in endovascular treatment for ruptured and unruptured cerebral aneurysms are feared particularly thromboembolic complications when stent device is used. Dual antiplatelet therapy is a standard of care but choice of appropriate association doesn’t reach any consensus in neurovascular context. Objective is to match efficiency of aspirin-clopidogrel and aspirin-ticagrelor associations in the prevention of thromboembolic complications after cerebral aneurysms stenting treatment. Methods This is a monocentric, retrospective, cohort comparison study design. We compared both groups treated with either clopidogrel or ticagrelor in association with aspirin in consecutive aneurysms protected with flow diverter embolization device or stent-assisted coiling. Data were collected on patient demographics and thromboembolic risk factors, procedural details, antiplatelet treatment regime, complications, angiographic and functional outcomes. Results One hundred and sixteen patients were treated by cerebral stenting between January 2013 and September 2017 and benefited from dual anti-agregation. Sex, age, smoking status and procedural details did not differ between the two groups. We show no difference about onset of thromboembolic complications and functional outcomes. Conclusion Aspirin and ticagrelor association in the field of interventional neuroradiology is not accepted in routine. Questions are to be solved about treatment resistance (absence of prerequisite agregability test) and hemorrhagic complications.
March 2018
Influence de l’aspect du thrombus en t2* sur le taux de recanalisation, le bon pronostic clinique
March 2018
Is there any intra-aneuvrysmal blood marker of aneuvrysm wall inflammation? Crossed analysis between transcriptomic and proteomic data
Publication date: March 2018
Source:Journal of Neuroradiology, Volume 45, Issue 2 Author(s): Florent Gariel, Caroline Rooryck-Thambo, Gaultier Marnat, Xavier Barreau, Patrice M
March 2018
Impact de la thrombectomie m
March 2018
Hypertension intracr
March 2018
Am
March 2018
La s
March 2018
Int
March 2018
Pre-neurosurgical detection of cerebral motor areas by functional MRI: Comparison between Blood Oxygenation Level (BOLD) and functional Arterial Spin Labeling (fASL) techniques
Publication date: March 2018
Source:Journal of Neuroradiology, Volume 45, Issue 2 Author(s): C. Paya, I. Corouge, E. Banniera, J.-C. Gentric, J.-C. Ferr
March 2018
Pr
March 2018
Comparaison de la s
March 2018
Comparaison de la perfusion corticale par ASL entre les formes mn
March 2018
Non-int
March 2018
Sensorineural hearing loss in patients with vestibular schwannoma relies on the presence of utricular hydrops, as diagnosed with heavily weighted T2 sequences
Publication date: March 2018
Source:Journal of Neuroradiology, Volume 45, Issue 2 Author(s): Guillaume Poillon, Michael Eliezer, Andr
March 2018
Analyse combin
March 2018
Mesure du ratio de transfert d’aimantation (MTR) sur la moelle
March 2018
La pr
March 2018
SAFE (safety and efficacy analysis of Fred embolic device in aneurysm treatment) : r
March 2018
CLARYS : clinical assessment of WEB® device in ruptured aneurysms : r
March 2018
ARETA – population et modalit
March 2018
L
March 2018
D
March 2018
Place de l’imagerie dans la pathologie de la loge caverneuse :
March 2018
Int

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