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Tomoaki Sasaki, John Kim, Toshio Moritani, Aristides A Capizzano, Shawn P Sato, Yutaka Sato, Patricia Kirby, Shunta Ishitoya, Akiko Oya, Masahiro Toda, Sayaka Yuzawa, Koji Takahashi
PURPOSE: To explore the utility of the apparent diffusion coefficient (ADC) and tumor volume to predict histological grade and prognosis in patients with choroid plexus tumors. METHODS: ADC and tumor volumes were retrospectively evaluated in 25 patients with choroid plexus papilloma (CPP; WHO grade 1 [n = 13]), atypical CPP (aCPP; grade 2 [n = 8]), or choroid plexus carcinoma (grade 3 [n = 4]) The prognostic roles of ADC and tumor volume were assessed...
March 15, 2018: Neuroradiology
Halil Onder
No abstract text is available yet for this article.
March 12, 2018: Neuroradiology
Isabel Fragata, Nuno Canto-Moreira, Patrícia Canhão
PURPOSE: Perimesencephalic hemorrhage (PMH) is a benign subtype of nonaneurysmal subarachnoid hemorrhage (SAH). We aimed to investigate if cerebral perfusion in PMH is less affected than in aneurysmal SAH (aSAH). METHODS: From a prospective cohort of 80 patients with spontaneous SAH, we included PMH patients (n = 15) and selected aSAH patients (n = 39) with similar clinical grade at admission (World Federation of Neurosurgeons Scale-WFNS I/II). Computed tomography (CT) perfusion was performed at < 72 h and/or at 8-10 days...
March 9, 2018: Neuroradiology
Rosalinda Calandrelli, Fabio Pilato, Luca Massimi, Marco Panfili, Gabriella D'Apolito, Simona Gaudino, Cesare Colosimo
PURPOSE: Craniosynostostic syndromes are due to multisuture synostoses and affect the entire craniofacial skeleton. This study analyzed the facial complex and airways to quantify the relationship between insufficient facial growth, airways obstruction, and the sutural pattern of the splanchnocranium and cranial fossae. METHODS: Preoperative high-resolution CT images in 19 infants with syndromic craniosynostosis were quantitatively analyzed. Because all children showed involvement of minor sutures/synchondroses coursing in the posterior cranial fossa, they were divided into three groups according to the synostotic involvement of "minor" sutures/synchondroses coursing in anterior (ACF) and middle (MCF) cranial fossae: group 1 (ACF), group 2 (MCF), and group 3 (ACF-MCF)...
March 8, 2018: Neuroradiology
Tomoya Watanabe, Haruo Isoda, Yasuo Takehara, Masaki Terada, Takehiro Naito, Takafumi Kosugi, Yuki Onishi, Chiharu Tanoi, Takashi Izumi
PURPOSE: We performed computational fluid dynamics (CFD) for patients with and without paraclinoid internal carotid artery (ICA) aneurysms to evaluate the distribution of vascular biomarkers at the aneurysm initiation sites of the paraclinoid ICA. METHODS: This study included 35 patients who were followed up for aneurysms using 3D time of flight (TOF) magnetic resonance angiography (MRA) and 3D cine phase-contrast MR imaging. Fifteen affected ICAs were included in group A with the 15 unaffected contralateral ICAs in group B...
March 8, 2018: Neuroradiology
Giuseppina Caiazzo, Michele Fratello, Federica Di Nardo, Francesca Trojsi, Gioacchino Tedeschi, Fabrizio Esposito
PURPOSE: Advances in computational network analysis have enabled the characterization of topological properties of human brain networks (connectomics) from high angular resolution diffusion imaging (HARDI) MRI structural measurements. In this study, the effect of changing the diffusion weighting (b value) and sampling (number of gradient directions) was investigated in ten healthy volunteers, with specific focus on graph theoretical network metrics used to characterize the human connectome...
March 8, 2018: Neuroradiology
Stuart Currie
No abstract text is available yet for this article.
March 3, 2018: Neuroradiology
Máté Kiss, Petra Hermann, Zoltán Vidnyánszky, Viktor Gál
The original version of this article contained a mistake. The correct Affiliation 2 is Semmelweis University, János Szentágothai PhD School, MR Research Centre, Balassa Street 6, Budapest 1083, Hungary.
March 3, 2018: Neuroradiology
Wouter J Schonewille, Volker Puetz, Patrik Michel
No abstract text is available yet for this article.
March 1, 2018: Neuroradiology
Jae Kim, Shailesh Male, Bharathi D Jagadeesan, Christopher Streib, Ramachandra P Tummala
PURPOSE: Contrast-induced nephropathy is a common clinical concern in patients undergoing neuroendovascular procedures, especially in those with pre-existent kidney disease. We aimed to define the incidence of contrast-induced nephropathy in these high-risk patients in our practice. METHODS: We analyzed data retrospectively from patients undergoing neuroendovascular procedures at two academic medical centers over a 4-year period. Contrast-induced nephropathy was determined by an absolute increase in serum creatinine of 0...
March 1, 2018: Neuroradiology
Jong Young Lee, Jong-Hwa Park, Hong Jun Jeon, Dae Young Yoon, Seoung Woo Park, Byung Moon Cho
PURPOSE: A complicated course of the femoral route for neurointervention can prevent approaching the target. Thus, we determined whether transcervical access in the hybrid angiosuite is applicable and beneficial in real practice. METHODS: From January 2014 to March 2017, this approach was used in 17 of 453 (3.75%) cases: 11 cerebral aneurysms (4 ruptured, 7 unruptured), 4 acute occlusions of the large cerebral artery, 1 proximal internal carotid artery (ICA) stenosis, and 1 direct carotid cavernous fistula (CCF)...
March 1, 2018: Neuroradiology
Taihei Inoue, Takeshi Nakaura, Morikatsu Yoshida, Koichi Yokoyama, Hiroyuki Uetani, Seitaro Oda, Daisuke Utsunomiya, Mika Kitajima, Kazunori Harada, Yasuyuki Yamashita
PURPOSE: The purpose of this study is to determine whether iterative model reconstruction (IMR) optimized for brain CT could improve the detection of acute stroke in the setting of thin image slices and narrow window settings. METHODS: We retrospectively reviewed 27 patients who presented acute middle cerebral artery (MCA) stroke. Images were reconstructed using filtered back projection (FBP; 1- and 5-mm slice thickness) and IMR (1 mm thickness), and contrast-to-noise ratios (CNRs) of infarcted and non-infarcted areas were compared...
February 23, 2018: Neuroradiology
Eddie Surer, Cristina Rossi, Anton S Becker, Tim Finkenstaedt, Moritz C Wurnig, Antonios Valavanis, Sebastian Winklhofer
PURPOSE: Intravoxel incoherent motion (IVIM) in diffusion-weighted magnetic resonance imaging (DW-MRI) attributes the signal attenuation to the molecular diffusion and to a faster pseudo-diffusion. Purpose of the study was to demonstrate the feasibility of IVIM for the investigation of intracranial cerebrospinal fluid (CSF) dynamics. METHODS: Cardiac-gated DW-MRI images with fifteen b-values (0-1300s/mm2 ) along three orthogonal directions (mediolateral (ML), anteroposterior (AP), and craniocaudal (CC)) were acquired during maximum systole and diastole in 10 healthy volunteers (6 males, mean age 36 ± 15 years)...
February 22, 2018: Neuroradiology
Cornelia Brendle, Johann-Martin Hempel, Jens Schittenhelm, Marco Skardelly, Gerald Reischl, Benjamin Bender, Ulrike Ernemann, Christian la Fougère, Uwe Klose
PURPOSE: The use of dynamic susceptibility contrast (DSC) perfusion and11 C-methionine positron emission tomography (MET-PET) for glioma grading is currently not standardized. The purpose of this study was to identify regions of interest (ROIs) that enable the best performance and clinical applicability in both methods, as well as to evaluate the complementarity of DSC perfusion and MET-PET in spatial hotspot definition. METHODS: In 41 patient PET/MRI datasets, different ROIs were drawn: in T2-hyperintense tumour, in T2-hyperintense tumour and adjacent oedema and in tumour areas with contrast enhancement, altered perfusion or pathological radiotracer uptake...
February 20, 2018: Neuroradiology
Giovanni Morana, Domenico Tortora, Serena Staglianò, Paolo Nozza, Samantha Mascelli, Mariasavina Severino, Gianluca Piatelli, Alessandro Consales, Maarten Lequin, Maria Luisa Garrè, Andrea Rossi
PURPOSE: The aim of this study was to compare arterial spin labeling (ASL) and dynamic susceptibility contrast (DSC) MRI perfusion with respect to diagnostic performance in tumor grading in pediatric patients with low- and high-grade astrocytic tumors (AT). METHODS: We retrospectively analyzed 37 children with histologically proven treatment naive low- and high-grade AT who underwent concomitant pre-operative ASL and DSC MRI perfusion. Studies were performed on a 1...
February 16, 2018: Neuroradiology
Kazufumi Kikuchi, Akio Hiwatashi, Osamu Togao, Koji Yamashita, Ryotaro Kamei, Mika Kitajima, Masafumi Kanoto, Hiroto Takahashi, Yusuke Uchiyama, Masafumi Harada, Yuki Shinohara, Takashi Yoshiura, Yuki Wakata, Hiroshi Honda
PURPOSE: Imaging findings of pilocytic astrocytoma (PA) vary widely, sometimes resembling those of high-grade glioma (HGG). This study aimed to identify the imaging parameters that can be used to differentiate PA from HGG. METHODS: Altogether, 60 patients with PAs and 138 patients with HGGs were included in the study. Tumor properties and the presence of hydrocephalus, peritumoral edema, and dissemination were evaluated. We also measured the maximum relative cerebral blood flow (rCBFmax ) and volume (rCBVmax ) and determined the minimum apparent diffusion coefficient (ADCmin ) in the tumor's solid components...
February 15, 2018: Neuroradiology
Tomas Hindmarsh, Olof Flodmark
No abstract text is available yet for this article.
February 13, 2018: Neuroradiology
Xiaohong Wu, Li Wang, Jingxin Zhong, Jacky Ko, Lin Shi, Yannie Soo, Thomas Leung, Ka Sing Wong, Jill Abrigo, Xiangyan Chen
PURPOSE: Intracranial artery calcification (IAC) has been demonstrated to be correlated with ischemic stroke, cognitive decline, and other vascular events by accumulating evidences from both Western and Asian populations. The proposed study aimed to investigate its potential mechanisms by evaluating the blood flow velocity and pulsatility index (PI) of cerebral arteries. METHODS: Consecutive ischemic stroke patients admitted to the Prince of Wales Hospital were recruited after excluding those with atrial fibrillation or poor temporal window...
February 9, 2018: Neuroradiology
Shuaishuai Xu, Shidong Ruan, Shanfeng Liu, Jianrong Xu, Ruozhen Gong
PURPOSE: This aimed to evaluate the prevalence and extent of bilateral sigmoid sinus dehiscence (SSD) and to explore the presence of idiopathic intracranial hypertension (IIH) in patients with unilateral pulsatile tinnitus (PT) with CTA/V. METHODS: Sixty PT patients (52 females; 40.4 ± 11.6 years [20-72]) who underwent CTA/V and 30 non-PT patients (27 females; 38.4 ± 14.7 years [12-62]) were enrolled in this study. The primary outcome measure was the radiographic presence of SSD...
February 7, 2018: Neuroradiology
Katsuhiro Mizutani, Takenori Akiyama, Yasuhiro Minami, Masahiro Toda, Hirokazu Fujiwara, Masahiro Jinzaki, Kazunari Yoshida
PURPOSE: Although involvement of the osseous component with an anterior condylar dural arteriovenous fistula (AC-DAVF) has been frequently described, osseous venous structures in which AC-DAVFs develop have not been fully elucidated. We investigated osseous venous structures adjacent to the hypoglossal canal in normal controls and patients with AC-DAVFs. METHODS: The study included 50 individuals with unruptured aneurysms as normal controls and seven patients with AC-DAVFs...
February 6, 2018: Neuroradiology
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