Xiaopan Zhang, Liang Liu, Yadong Li, Kejia Wang, Guangying Zheng, Yong Zhang, Jingliang Cheng, Baohong Wen
PURPOSE: To investigate the abnormal changes of local brain activity in children with right-eye amblyopia of varying degrees. METHODS: Data of resting-state functional magnetic resonance imaging were collected from 16 children with severe amblyopia, 17 children with mild to moderate amblyopia, and 15 children with normal binocular vision. Local brain activity was analyzed using the amplitude of low-frequency fluctuations (ALFF) and regional homogeneity (ReHo). RESULTS: There were extensive ALFF differences among the three groups in 10 brain regions...
September 26, 2023: Neuroradiology
Maximilian Fenzl, Martin Backens, Silviu Bodea, Miriam Wittemann, Florian Werler, Jule Brielmaier, Robert Christian Wolf, Wolfgang Reith
PURPOSE: This prospective cross-sectional study investigated the influence of regular cannabis use on brain metabolism in young cannabis users by using combined proton and phosphorus magnetic resonance spectroscopy. METHODS: The study was performed in 45 young cannabis users aged 18-30, who had been using cannabis on a regular basis over a period of at least 2 years and in 47 age-matched controls. We acquired 31P MRS data in different brain regions at 3T with a double-resonant 1H/31P head coil, anatomic images, and 1H MRS data with a standard 20-channel 1H head coil...
September 22, 2023: Neuroradiology
Torge Huckhagel, Christian Riedel, Jörg Flitsch, Roman Rotermund
PURPOSE: While MRI has become the imaging modality of choice in the diagnosis of sellar tumors, no systematic attempt has yet been made to align radiological reporting of findings with the information needed by the various medical disciplines dealing with these patients. Therefore, we aimed to determine the prevailing preferences in this regard through a nationwide expert survey. METHODS: First, an interdisciplinary literature-based catalog of potential reporting elements for sellar tumor MRI examinations was created...
September 22, 2023: Neuroradiology
Suguru Igarashi, Kohei Chida, Tsuyoshi Matsuda, Kota Takeda, Susumu Hayakawa, Shota Tsutsui, Shunrou Fujiwara, Yoshitaka Kubo, Makoto Sasaki, Kuniaki Ogasawara
Flow diverters (FDs) are utilized for a wide range of aneurysms, but show safety issues such as adverse interactions with static magnetic fields (displacement force and torque) and radiofrequency-induced heating during magnetic resonance imaging (MRI). The present study aimed to assess these adverse interactions in a 7-tesla (7T) static magnetic field and radiofrequency-induced heating during a 7T MRI for two types of FD. Displacement force and magnetically induced torque were assessed using the deflection angle method and low friction surface method, respectively...
September 13, 2023: Neuroradiology
(no author information available yet)
No abstract text is available yet for this article.
September 12, 2023: Neuroradiology
Kensei Matsuo, Takeshi Nakaura, Kosuke Morita, Hiroyuki Uetani, Yasunori Nagayama, Masafumi Kidoh, Masamichi Hokamura, Yuichi Yamashita, Kensuke Shinoda, Mitsuharu Ueda, Akitake Mukasa, Toshinori Hirai
PURPOSE: The purpose of this study is to evaluate the influence of super-resolution deep learning-based reconstruction (SR-DLR), which utilizes k-space data, on the quality of images and the quantitation of the apparent diffusion coefficient (ADC) for diffusion-weighted images (DWI) in brain magnetic resonance imaging (MRI). METHODS: A retrospective analysis was performed on 34 patients who had undergone DWI using a 3 T MRI system with SR-DLR reconstruction based on k-space data in August 2022...
September 7, 2023: Neuroradiology
Rüdiger von Kummer
No abstract text is available yet for this article.
September 2, 2023: Neuroradiology
Jack Pepys, Bernard Yan
No abstract text is available yet for this article.
August 31, 2023: Neuroradiology
Sakyo Hirai, Mariko Ishikawa, Hirotaka Sagawa, Jiro Aoyama, Kyohei Fujita, Shoko Fujii, Hikaru Wakabayashi, Satoru Takahashi, Kazutaka Sumita
The twisting phenomenon of the flow diverter stents rarely occurs, but it recently became relatively well-recognized. There have been few reports on single-layer flow diverters only. The Flow Redirection Endoluminal Device (FRED) (MicroVention, Tustin, California) has a unique design characterized by a braided dual-layer self-expanding stent. There have been no reports on the twisting phenomenon of FRED. This study reports two cases of acute in-stent blood flow disturbances after the deployment of FRED in a patient with intracranial aneurysms associated with "ghost twisting...
August 30, 2023: Neuroradiology
Taku Tajima, Hiroyuki Akai, Koichiro Yasaka, Akira Kunimatsu, Naoki Yoshioka, Masaaki Akahane, Kuni Ohtomo, Osamu Abe, Shigeru Kiryu
PURPOSE: To compare the diagnostic performance of 1.5 T versus 3 T magnetic resonance angiography (MRA) for detecting cerebral aneurysms with clinically available deep learning-based computer-assisted detection software (EIRL aneurysm® [EIRL_an]), which has been approved by the Japanese Pharmaceuticals and Medical Devices Agency. We also sought to analyze the causes of potential false positives. METHODS: In this single-center, retrospective study, we evaluated the MRA scans of 90 patients who underwent head MRA (1...
August 30, 2023: Neuroradiology
Saeed Mohsenian, Alaaddin Ibrahimy, Mohamad Motaz F Al Samman, John N Oshinski, Rafeeque A Bhadelia, Daniel L Barrow, Philip A Allen, Rouzbeh Amini, Francis Loth
PURPOSE: Chiari malformation type I (CMI) patients have been independently shown to have both increased resistance to cerebrospinal fluid (CSF) flow in the cervical spinal canal and greater cardiac-induced neural tissue motion compared to healthy controls. The goal of this paper is to determine if a relationship exists between CSF flow resistance and brain tissue motion in CMI subjects. METHODS: Computational fluid dynamics (CFD) techniques were employed to compute integrated longitudinal impedance (ILI) as a measure of unsteady resistance to CSF flow in the cervical spinal canal in thirty-two CMI subjects and eighteen healthy controls...
August 30, 2023: Neuroradiology
Helena Guerreiro, Fabian A Flottmann, Anna A Kyselyova, Maximilian Wagner, Caspar Brekenfeld, Bernd Eckert, Till Illies, Fritz Wodarg, Jens Fiehler, Maxim Bester
PURPOSE: Flow arrest using a balloon guide catheter (BGC) in mechanical thrombectomy (MT) due to large vessel occlusion has been associated with better outcomes. Known limitations of currently commercially available BGCs are incompatibility with large bore aspiration catheters (AC) and lack of distal flexibility. Walrus presents variable stiffness and compatibility with large bore AC. The goal of this study is to describe the first experience with Walrus in a realistic stroke simulation model...
August 29, 2023: Neuroradiology
Kai Shang, Wangshu Zhu, Lifang Ye, Yuehua Li
PURPOSE: This study aimed to investigate the long-term functional outcome of patients with different degrees of thrombus perviousness (TP) undergoing mechanical thrombectomy alone and those undergoing combined intravenous thrombolysis (IVT) plus mechanical thrombectomy. METHODS: We conducted a retrospective analysis of consecutive patients with acute ischemic stroke due to large vessel occlusion who underwent mechanical thrombectomy alone or bridging therapy between January 2016 and October 2020...
August 29, 2023: Neuroradiology
Hua Juan Yang, Hong Mei Wu, Xiao Hui Li, Rui Jin, Lei Zhang, Ting Dong, Xiao Qian Zhou, Bo Zhang, Qiu Juan Zhang, Cui Ping Mao
PURPOSE: The aim of this study was to investigate alterations in the topological organization of whole-brain functional networks in patients with chronic low back pain (CLBP) and characterize the relationship of these alterations with pain characteristics. METHODS: Thirty-three CLBP patients and 34 matched healthy controls (HCs) underwent fMRI scans. A graph-theoretical approach was applied to identify brain network changes in patients suffering from chronic low back pain given its nonspecific etiology and complexity...
August 22, 2023: Neuroradiology
Isabel Wanke, Karl-Olof Lövblad, Harald Grossmann, Claudio L A Bassetti, Luca Remonda
No abstract text is available yet for this article.
August 10, 2023: Neuroradiology
Claudia Godi, Francesco Destro, Paolo Garofalo, Enrico Tombetti, Alessandro Ambrosi, Antonella Iadanza, Caterina Michelozzi, Andrea Falini, Nicoletta Anzalone
PURPOSE: Vessel wall imaging (VWI) with black-blood (BB) technique can demonstrate aneurysmal enhancement preluding to growth/rupture in treatment-naive cerebral aneurysms. Interestingly, recent works showed that BB enhancement may also occur in endovascularly treated aneurysms, though its meaning is controversial. Hypothesizing a flow-related mechanism of BB enhancement, we explored its relationship with incomplete occlusion status and coil packing density at DSA. METHODS: We analyzed the subjects undergoing 3T MRI between January 2017 and October 2020 for a previous aneurysmal coiling...
August 9, 2023: Neuroradiology
Yuke Zhong, Hang Liu, Guohui Liu, Yi Liang, Chengcheng Dai, Lili Zhao, Hongyu Lai, Lijuan Mo, Changhong Tan, Fen Deng, Xi Liu, Lifen Chen
PURPOSE: Cerebellum modulates the amplitude of resting tremor in Parkinson's disease (PD) via cerebello-thalamo-cortical (CTC) circuit. Tremor-related white matter alterations have been identified in PD patients by pathological studies, but in vivo evidence is limited; the influence of such cerebellar white matter alterations on tremor-related brain network, including CTC circuit, is also unclear. In this study, we investigated the cerebral and cerebellar white matter alterations in PD patients with resting tremor using diffusion tensor imaging (DTI)...
August 7, 2023: Neuroradiology
Vineet Vijay Gorolay, Ngoc-Anh Tran, Ryan Tade, Kristen Baugnon, Ashley Aiken, Xin Wu
CT and MRI findings of tongue ptosis and atrophy should alert radiologists to potential pathology along the course of the hypoglossal nerve (cranial nerve XII), a purely motor cranial nerve which supplies the intrinsic and extrinsic muscles of the tongue. While relatively specific for hypoglossal nerve pathology, these findings do not accurately localize the site or cause of denervation. A detailed understanding of the anatomic extent of the nerve, which crosses multiple anatomic spaces, is essential to identify possible underlying pathology, which ranges from benign postoperative changes to life-threatening medical emergencies...
August 4, 2023: Neuroradiology
David R van Nederpelt, Houshang Amiri, Iman Brouwer, Samantha Noteboom, Lidwine B Mokkink, Frederik Barkhof, Hugo Vrenken, Joost P A Kuijer
PURPOSE: Volume measurement using MRI is important to assess brain atrophy in multiple sclerosis (MS). However, differences between scanners, acquisition protocols, and analysis software introduce unwanted variability of volumes. To quantify theses effects, we compared within-scanner repeatability and between-scanner reproducibility of three different MR scanners for six brain segmentation methods. METHODS: Twenty-one people with MS underwent scanning and rescanning on three 3 T MR scanners (GE MR750, Philips Ingenuity, Toshiba Vantage Titan) to obtain 3D T1-weighted images...
August 1, 2023: Neuroradiology
Luca Melazzini, Laura Mazzocchi, Arianna Vecchio, Alexandra Paredes, Martina M Mensi, Elena Ballante, Matteo Paoletti, Stefano Bastianello, Umberto Balottin, Renato Borgatti, Anna Pichiecchio
PURPOSE: Psychosis is a symptom common to several mental illnesses and a defining feature of schizophrenia spectrum disorders, whose onset typically occurs in adolescence. Neuroradiological studies have reported evidence of brain structural abnormalities in patients with overt psychosis. However, early identification of brain structural changes in young subjects at risk for developing psychosis (such as those with Attenuated Psychosis Syndrome -APS) is currently lacking. METHODS: Brain 3D T1 -weighted and 64 directions diffusion-weighted images were acquired on 55 help-seeking adolescents (12-17 years old) with psychiatric disorders who referred to our Institute...
August 1, 2023: Neuroradiology
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