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MRA Cerebral

Su-Hee Cho, Ji-Ye Lee, Kyeong-Hwa Ryu, Dae Chul Suh
Purpose: False positive diagnoses of cerebral aneurysm via magnetic resonance angiography (MRA) screening may increase unnecessary cerebral catheter angiography. The purpose of this study was to investigate the effects of medical liability on medical decision-making during radiologic interpretation. Materials and Methods: We included 56 consecutive patients who were referred with suspected aneurysm based on MRA or computed tomography angiography (CTA) and showed no aneurysm on subsequent digital subtraction angiography (DSA)...
March 2018: Neurointervention
Hélène Raoult, François Eugène, Anthony Le Bras, Géraldine Mineur, Béatrice Carsin-Nicol, Jean-Christophe Ferré, Jean-Yves Gauvrit
BACKGROUND AND PURPOSE: The WEB is an innovative flow disruption device for cerebral aneurysm embolization with rapidly expanding indications. Our purpose was to evaluate the diagnostic performance of CTA at 1-year follow-up of aneurysms treated with the WEB. MATERIALS AND METHODS: Between April 2014 and May 2016, the study prospectively included patients treated with the WEB at our institution, and followed up within 24hours by CTA and at 1 year by CTA, TOF MRA and DSA...
March 7, 2018: Journal of Neuroradiology. Journal de Neuroradiologie
Tomohiro Tsunekawa, Motoshi Sawada, Takayoshi Kato, Yusuke Motoji, Tatsuomi Kinoshita, Akihiro Hirakawa, Yasuhide Okawa, Shinji TomitaMD
OBJECTIVES: Intracranial cerebral atherosclerosis is a significant predictor of stroke after coronary artery bypass grafting (CABG). However, there is limited information on intracranial occlusive lesions in patients undergoing CABG. The purpose of the study was to elucidate the precise prevalence and distribution of occlusive lesions of the extracranial and intracranial arteries in patients undergoing CABG. METHODS: Between 2009 and 2016, 205 patients underwent preoperative magnetic resonance angiography (MRA) and elective CABG...
March 5, 2018: Seminars in Thoracic and Cardiovascular Surgery
Nohra Chalouhi, Purvee D Patel, Elias Atallah, Robert M Starke, Ameet Chitale, Michael Lang, Stavropoula Tjoumakaris, David Hasan, Hekmat Zarzour, Michelle J Smith, Robert Rosenwasser, Pascal Jabbour
BACKGROUND: Flow diversion has emerged as a highly effective treatment for intracranial aneurysms. OBJECTIVE: To assess the yield of further angiographic follow-up in aneurysms that have achieved adequate occlusion after treatment with the Pipeline Embolization Device (PED; Medtronic Inc, Dublin, Ireland). METHODS: This is a single-institution, retrospective study. Inclusion criteria were as follows: (1) patients with 1 or more aneurysms treated with PED, (2) available short-term (<12 mo) follow-up digital subtraction angiography (DSA), (3) complete (100%) or near-complete (>95%) occlusion on short-term follow-up DSA, and (4) available further angiographic follow-up (DSA, Magnetic Resonance Angiography (MRA), or Computed Tomography Angiography (CTA))...
March 5, 2018: Neurosurgery
Ralph Rahme, Tejaswi D Sudhakar, Marjan Alimi, Timothy G White, Rafael A Ortiz, David J Langer
BACKGROUND AND IMPORTANCE: Cerebral hyperperfusion syndrome (CHS) is a well-known complication of superficial temporal artery (STA) to middle cerebral artery (MCA) bypass for ischemic cerebrovascular disease. While this argues against "low flow" in the bypass construct, flow rates in the graft have not been previously quantified in the setting of CHS. CLINICAL PRESENTATION: A 58-yr-old man presented with recurrent left hemispheric ischemic strokes and fluctuating right hemiparesis and aphasia...
March 3, 2018: Operative Neurosurgery (Hagerstown, Md.)
Satoshi Yashiro, Hiroyuki Kameda, Ai Chida, Yusuke Todate, Yutaka Hasegawa, Kan Nagasawa, Ikuko Uwano, Makoto Sasaki, Kuniaki Ogasawara, Yasushi Ishigaki
AIM: Progress in neuroimaging techniques allows us to investigate the microvasculature characteristics including lenticulostriate arteries (LSA), which are closely associated with lacunar infarction. Because ischemic stroke is a more critical health problem in East Asian than in other populations, in order to clarify pathological changes underlying cerebral small vessel disease (SVD), we projected an imaging analysis of LSA using high-resolution brain magnetic resonance imaging (MRI) in middle-aged Japanese subjects with type 2 diabetes...
March 5, 2018: Journal of Atherosclerosis and Thrombosis
Wing Tung Esther Yeung, Ikuko Mizuta, Akiko Watanabe-Hosomi, Akiyoshi Yokote, Takashi Koizumi, Mao Mukai, Masako Kinoshita, Tomoyuki Ohara, Toshiki Mizuno
Cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy (CADASIL), caused by NOTCH3, primarily affects small cerebral arteries; however, stenosis of major intracranial arteries has occasionally been reported. Recent studies identified a close association between the c.14576G>A (p.R4859K, rs112735431) variant of the ring finger protein 213 (RNF213) gene and sporadic intracranial arterial stenosis (ICAS). To determine whether RNF213 is associated with ICAS in CADASIL, we genotyped rs112735431 for 124 patients with CADASIL...
March 2, 2018: Journal of Human Genetics
Mohamed Almuqbil, Michael J Rivkin, Masanori Takeoka, Edward Yang, Lance H Rodan
GLUT1 deficiency syndrome (GLUT1DS) is a well described neurometabolic disorder that results from impaired glucose transport into the central nervous system. GLUT1DS classically presents with infantile-onset epilepsy, progressive microcephaly, developmental delay, ataxia, dystonia, and spasticity, but a minority of patients may manifest with paroxysmal non-epileptic phenomena including hemiparesis (Wang et al., 2002). We report for the first time cerebral perfusion changes during an acute episode of hemiparesis in a 9 year old child with GLUT1DS...
February 19, 2018: European Journal of Paediatric Neurology: EJPN
Jeewaka E Mohotti, Nicole S Carter, Victor Jia Wei Zhang, Leon T Lai, Christopher Xenos, Hamed Asadi, Ronil V Chandra
Intracranial aneurysms in the neonate, presenting in the first 4 weeks of life, are exceedingly rare. They appear to have characteristics, including presentation and location, that vary from those found in adults. The authors present a case of a 28-day-old neonate with a ruptured distal middle cerebral artery (MCA) aneurysm. Initial noninvasive imaging with transfontanelle ultrasound and CT confirmed intraparenchymal and subarachnoid hemorrhage. Contrast-enhanced MRI revealed a 14-mm ruptured fusiform MCA aneurysm that was not identified on time-of-flight magnetic resonance angiography (MRA)...
March 2, 2018: Journal of Neurosurgery. Pediatrics
Yuxin Li, Weixingzi Xu, Chong Sun, Jie Lin, Jianxun Qu, Jiawen Cao, Haiqing Li, Liqin Yang
PURPOSE: To investigate the cerebral macrovascular changes as well as the relationship of large vessels and cerebral blood flow (CBF) in mitochondrial encephalomyopathy, lactic acidosis and stroke-like episodes (MELAS) using magnetic resonance angiography (MRA) and arterial spin labeling (ASL) perfusion MR imaging (MRI). METHODS: A total of 20 patients diagnosed with MELAS (12 males, 8 females; mean age, 23.3 years) underwent conventional MRI, time-of-flight (TOF) MRA and three dimensional ASL...
February 20, 2018: Clinical Neuroradiology
Yunchang Mo, Luping Huang, Linbi Chen, Michael Veronesi, Yiyi Shi, Sijia Chen, Linli Peng, Leping Zhou, Yonglin Pu, Junlu Wang
Cerebral vasospasm (CVS) is a severe complication that occurs following aneurysmal subarachnoid hemorrhage (SAH). Magnetic resonance angiography (MRA) has been used to evaluate brain injury following SAH in humans. The present study was designed to assess a rabbit model of symptomatic CVS (SCVS) and the utility of MRA in evaluating SCVS in rabbits. Japanese white rabbits (n=24) were randomly divided into 2 equal groups: A sham group and a SAH group. Neurological scores were evaluated for 7 days following SAH...
March 2018: Experimental and Therapeutic Medicine
Tao Yuan, Guoli Ren, Guanmin Quan, Duo Gao
BACKGROUND: Outcome prediction of asymmetrical prominent cortical veins (APCVs) on infarction is still debated and may help in selecting patients for reperfusion treatment. PURPOSE: To explore the relationship between fewer peripheral APCVs and the outcome in the patients of acute/subacute middle cerebral artery (MCA) infarctions as well as the relationship between this sign and stenosis of ipsilateral MCA. STUDY TYPE: Retrospective case-control study...
February 9, 2018: Journal of Magnetic Resonance Imaging: JMRI
Dong Hyun Yoo, Young Dae Cho, Jusun Moon, Jeongjun Lee, Hyun-Seung Kang, Won-Sang Cho, Jeong Eun Kim, Gyojun Hwang, O-Ki Kwon, Moon Hee Han
Stent-assisted coil embolization technique have broadened indications for endovascular therapy of aneurysms. The Low-profile Visualized Intraluminal Support device (LVIS) is a self-expanding, nitinol single-braid and closed-cell device introduced fairly recently. We aim to evaluate long-term outcome of LVIS device in stent-assisted coiling of intracranial aneurysms. Between October 2012 and February 2013, a total of 55 patients with unruptured wide-necked intracranial aneurysms underwent coil embolization procedures involving LVIS devices...
February 5, 2018: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
Alexandre Fortin, Stéphanie Salmon, Joseph Baruthio, Maya Delbany, Emmanuel Durand
PURPOSE: Develop and evaluate a complete tool to include 3D fluid flows in MRI simulation, leveraging from existing software. Simulation of MR spin flow motion is of high interest in the study of flow artifacts and angiography. However, at present, only a few simulators include this option and most are restricted to static tissue imaging. THEORY AND METHODS: An extension of JEMRIS, one of the most advanced high performance open-source simulation platforms to date, was developed...
February 5, 2018: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
Ali Nikkhah
Kawasaki disease (KD) is an inflammatory vasculitis. KD is classified into two groups based on clinical characteristics criteria, namely classic and incomplete. Cerebral vascular abnormality, especially arterial ischemic stroke (AIS) is very rare and unusual in KD. Here, we report a 4-year-old boy who was referred to our tertiary pediatric center with abrupt right hemiparesis and aphasia. At admission time, he had febrile illness and was toxic. On physical examination, we found unilateral left submandibular lymphadenopathy...
January 2018: Iranian Journal of Medical Sciences
Yi-Yi Xuan, Tian-Fang Li, Lei Zhang, Sheng-Yun Liu
RATIOINALE: Relapsing polychondritis (RP) is a rare and heterogeneous disease complex of unknown origin which basically affects cartilaginous structures, 40% of which accompanied by rheumatic, hematologic, and endocrine disease. Among them, vasculitis is the most common accompanying type and usually presented with positive antineutrophilic cytoplasmic antibody (ANCA). The presence of ANCA could be primary or drug-induced like propylthiouracil (PTU). Central involvement of RP is very rare, and there is almost no report of cerebral vasculopathy manifested as moyamoya...
December 2017: Medicine (Baltimore)
C Q Li, A Hsiao, J Hattangadi-Gluth, J Handwerker, N Farid
Brain AVMs treated with stereotactic radiosurgery typically demonstrate a minimum latency period of 1-3 years between treatment and nidus obliteration. Assessment of treatment response is usually limited to evaluation of AVM nidus structural changes using conventional MR imaging and MRA techniques. This report describes the use of 4D Flow MRI to also measure radiation-induced hemodynamic changes in a Spetzler-Martin grade III AVM, which were detectable as early as 6 months after treatment.
January 25, 2018: AJNR. American Journal of Neuroradiology
Makoto Obara, Osamu Togao, Gabriele M Beck, Shuhei Shibukawa, Tomoyuki Okuaki, Masami Yoneyama, Masanobu Nakamura, Hiroshi Honda, Marc Van Cauteren
PURPOSE: 4D dynamic MR angiography (4D-MRA) using pseudo-continuous arterial spin labeling (pCASL), combined with Keyhole and View-sharing (4D-PACK) for scan acceleration, is introduced. Its validity for arterial inflow dynamics visualization was investigated through comparison with 4D-pCASL and contrast inherent inflow enhanced multiphase angiography (CINEMA). METHODS: Six healthy volunteers were included in the study. The arterial transit time (ATT) in 4D-PACK was measured at multiple regions in middle cerebral artery (MCA), and Pearson's correlation coefficient with ATT in 4D-pCASL was calculated...
January 25, 2018: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
Toshiyuki Okazaki, Shinsuke Irie, Toru Inagaki, Osamu Saito, Motoshige Yamashina, Hitoshi Hyase, Hiroshi Nakagawa, Shinji Nagahiro, Koji Saito
Superficial temporal artery (STA)-middle cerebral artery (MCA) bypass is an established surgical technique for achieving revascularization. It is important to select the proper recipient artery of MCA. 3D-CTA and conventional angiography are useful in the selection process but need contrast agents. The authors designed the coloring MRA technique that needed no agents to visualize the recipient artery. Retrospective evaluation of the efficacy and limitation for selection of the recipient artery and decision of the place and size of the craniotomy were carried out...
January 20, 2018: World Neurosurgery
Toru Takino, Satoshi Shibuma, Yu Kanemaru, Koji Okamura, Aki Oshima, Manami Tazawa, Takeo Nashimoto, Naoto Tsuchiya, Junichi Yoshimura, Kiminori Netsu, Takafumi Saito
We report a case of bilateral internal carotid artery(ICA)dissection associated with bilateral elongated styloid processes(ESPs). A 46-year-old man presented with transient aphasia and left visual disturbance at a business meeting. He complained of a foreign body sensation in his throat during swallowing for two years. Magnetic resonance imaging(MRI)demonstrated fresh small infarcts in the left corona radiata. Magnetic resonance angiography(MRA)revealed string signs bilaterally in the cervical ICAs. The patient was diagnosed with bilateral idiopathic ICA dissection and was treated with ozagrel and clopidogrel...
January 2018: No Shinkei Geka. Neurological Surgery
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