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https://www.readbyqxmd.com/read/28075620/diagnostic-efficacy-of-structural-mri-in-patients-with-mild-to-moderate-alzheimer-disease-automated-volumetric-assessment-versus-visual-assessment
#1
Jeeyoung Min, Won-Jin Moon, Ji Young Jeon, Jin Woo Choi, Yeon-Sil Moon, Seol-Heui Han
OBJECTIVE: The purpose of this study was to compare the diagnostic efficacies of an automated volumetric assessment tool and visual assessment in the evaluation of medial temporal lobar atrophy in mild-to-moderate Alzheimer disease (AD). MATERIALS AND METHODS: This retrospective study included 30 patients with mild-to-moderate AD and 25 age-matched healthy control subjects undergoing MRI with a 3D fast spoiled gradient recalled-echo sequence at 3 T. The images were processed with fully automated volumetric analysis software...
January 11, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28071288/vulnerable-carotid-plaque-imaging-and-histopathology-without-a-dedicated-mri-receiver-coil
#2
Laura A Fitzpatrick, Nadav Berkovitz, Marlise P Dos Santos, Nevin Majeed, Rafael Glikstein, Santanu Chakraborty, John P Veinot, Grant Stotts, Alain Berthiaume, Robert Chatelain
Stroke is associated with vulnerable carotid artery plaques showing specific histopathologic features, namely a lipid-rich necrotic core, intraplaque hemorrhage, ulceration, and thin fibrous cap. While ultrasound and computed tomography (CT) can identify carotid plaques and determine the extent of stenosis, magnetic resonance imaging (MRI) provides further information regarding plaque composition and morphology. In this feasibility study, three patients with symptomatic, moderately stenosed plaques were imaged with CT angiography (CTA) and MRI (3T and 1...
January 1, 2017: Neuroradiology Journal
https://www.readbyqxmd.com/read/28059706/the-prevalence-of-malformations-of-cortical-development-in-a-pediatric-hereditary-hemorrhagic-telangiectasia-population
#3
G J Palagallo, S R McWilliams, L A Sekarski, A Sharma, M S Goyal, A J White
BACKGROUND AND PURPOSE: Brain AVM, cerebral abscess, and ischemic stroke are among the well known neurologic manifestations of hereditary hemorrhagic telangiectasia. However, recently reported data suggest an additional association with malformations of cortical development. The purpose of this study was to determine the prevalence of malformations of cortical development in a population of pediatric patients with hereditary hemorrhagic telangiectasia. MATERIALS AND METHODS: A retrospective review of brain MRIs from 116 pediatric patients was performed...
November 10, 2016: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28048805/su-f-r-42-association-of-radiomic-and-metabolic-tumor-volumes-in-radiation-treatment-of-glioblastoma-multiforme
#4
C Lopez, N Nagornaya, N Parra, D Kwon, F Ishkanian, A Markoe, A Maudsley, R Stoyanova
PURPOSE: High-throughput extraction of imaging and metabolomic quantitative features from MRI and MR Spectroscopy Imaging (MRSI) of Glioblastoma Multiforme (GBM) results in tens of variables per patient. In radiotherapy (RT) of GBM, the relevant metabolic tumor volumes (MTVs) are related to aberrant levels of N-acetyl Aspartate (NAA) and Choline (Cho). Corresponding Clinical Target Volumes (CTVs) for RT planning are based on Contrast Enhancing T1-weighted MRI (CE-T1w) and T2-weighted/Fluid Attenuated Inversion Recovery (FLAIR) MRI...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048264/su-d-207b-02-early-grade-classification-in-meningioma-patients-combining-radiomics-and-semantics-data
#5
T Coroller, W Bi, M Abedalthagafi, A Aizer, W Wu, N Greenwald, R Beroukhim, O Al-Mefty, S Santagata, I Dunn, B Alexander, R Huang, H Aerts
PURPOSE: The clinical management of meningioma is guided by its grade and biologic behavior. Currently, diagnosis of tumor grade follows surgical resection and histopathologic review. Reliable techniques for pre-operative determination of tumor behavior are needed. We investigated the association between imaging features extracted from preoperative gadolinium-enhanced T1-weighted MRI and meningioma grade. METHODS: We retrospectively examined the pre-operative MRI for 139 patients with de novo WHO grade I (63%) and grade II (37%) meningiomas...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047859/th-ab-207a-10-sub-msv-cerebral-ct-perfusion-imaging-using-prior-image-constrained-compressed-sensing-a-prospective-clinical-trial
#6
K Li, P Yang, M Cathey, J Tang, H Rowley, P Turski, V Prabhakaran, C Strother, G-H Chen
PURPOSE: A prospective clinical study was conducted to assess whether sub-mSv cerebral CT perfusion (CTP) imaging can be achieved using the Prior Image Constrained Compressed Sensing (PICSS) reconstruction algorithm. METHODS: Following a standard dose (SD) CTP acquisition, 31 patients (median age, 62 years; 15 M/16 F; median BMI, 27) underwent an additional reduced dose (RD) CTP acquisition at 20% of the standard dose level. Several algorithms (PICCS, ASIR, and FBP) were used to reconstruct CTP source images of the RD series...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046802/su-f-i-46-optimizing-dose-reduction-in-adult-head-ct-protocols-while-maintaining-image-quality-in-postmortem-head-scans
#7
I Lipnharski, C Carranza, N Quails, N Correa, D Rajderkar, J Bennett, L Rill, M Arreola
PURPOSE: To optimize adult head CT protocol by reducing dose to an appropriate level while providing CT images of diagnostic quality. METHODS: Five cadavers were scanned from the skull base to the vertex using a routine adult head CT protocol (120 kVp, 270 mA, 0.75 s rotation, 0.5 mm × 32 detectors, 70.8 mGy CTDIvol) followed by seven reduced-dose protocols with varying combinations of reduced tube current, reduced rotation time, and increased detectors with CTDIvol ranging from 38...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28042366/posterior-reversible-encephalopathy-syndrome-local-experience-from-saudi-arabia
#8
Hussein Algahtani, Abdulhadi Algahtani, Ahmad Aldarmahi, Mohammed Hmoud, Yousef Marzuk, Bader Shirah
OBJECTIVES: Posterior reversible encephalopathy syndrome (PRES) is a clinicoradiological syndrome characterized by headache, altered mental status, seizures, or loss of vision. In this study, we report the largest series of PRES coming from Saudi Arabia and explore the etiology, clinical presentation, and outcome. We also report new imaging findings associated with this condition. METHODS: We performed a retrospective study of all cases of PRES admitted to King Abdulaziz Medical City, Jeddah, Saudi Arabia, between the years 2005 and 2015...
January 2017: Neurohospitalist
https://www.readbyqxmd.com/read/28041329/the-impact-of-histology-and-delivered-dose-on-local-control-of-spinal-metastases-treated-with-stereotactic-radiosurgery
#9
Yoshiya Yamada, Evangelia Katsoulakis, Ilya Laufer, Michael Lovelock, Ori Barzilai, Lily A McLaughlin, Zhigang Zhang, Adam M Schmitt, Daniel S Higginson, Eric Lis, Michael J Zelefsky, James Mechalakos, Mark H Bilsky
OBJECTIVE An analysis of factors contributing to durable radiographic control of spinal metastases was undertaken, drawing from a large single-institution database in an attempt to elucidate indications and dose requirements for successful treatment. METHODS All patients treated at a single institution with stereotactic radiosurgery (SRS) of the spine as first-line therapy were assessed for local progression of the treated site, defined as radiographic enlargement of the treated tumor and/or biopsy-proven evidence of active tumor cells...
January 2017: Neurosurgical Focus
https://www.readbyqxmd.com/read/28028789/isoflurane-use-in-the-treatment-of-super-refractory-status-epilepticus-is-associated-with-hippocampal-changes-on-mri
#10
Kristin M Ikeda, Robert Connors, Donald H Lee, Alexander G Khandji, Jan Claassen, G Bryan Young
BACKGROUND: Refractory status epilepticus (RSE) is associated with high morbidity and mortality. Experts recommend aggressive management with continuous intravenous infusions or inhaled anesthetics such as isoflurane. However, there is concern that MRI changes in RSE reflect isoflurane neurotoxicity. We performed a case-control study to determine whether isoflurane is neurotoxic, based on MRI signal changes. METHODS: We performed a retrospective case-control study of the incidence of MRI changes in RSE treated with and without isoflurane...
December 27, 2016: Neurocritical Care
https://www.readbyqxmd.com/read/28012357/comparison-of-2d-single-shot-turbo-spin-echo-and-spin-echo-echo-planar-diffusion-weighted-brain-mri-at-3-0-tesla-preliminary-experience-in-children
#11
Amber L Pokorney, Jeffrey H Miller, Houchun H Hu
PURPOSE: To qualitatively compare a 2D single-shot turbo-spin-echo (ssTSE) diffusion-weighted imaging MRI technique with a spin-echo echo-planar imaging (SE-EPI) approach in pediatric neuroimaging. METHODS: Images were acquired at 3T in 15 patients (10.6±6.0years). A neuroradiologist rated the data based on the severity of image artifacts from air-tissue interfaces and devices such as ventriculoperitoneal shunts and orthodontia, and whether their presence affected diagnostic image quality...
December 15, 2016: Clinical Imaging
https://www.readbyqxmd.com/read/28011044/association-of-radiomics-and-metabolic-tumor-volumes-in-radiation-treatment-of-glioblastoma-multiforme
#12
Christopher J Lopez, Natalya Nagornaya, Nestor A Parra, Deukwoo Kwon, Fazilat Ishkanian, Arnold M Markoe, Andrew Maudsley, Radka Stoyanova
PURPOSE: To build a framework for investigation of the associations between imaging, clinical target volumes (CTVs), and metabolic tumor volumes (MTVs) features for better understanding of the underlying information in the CTVs and dependencies between these volumes. High-throughput extraction of imaging and metabolomic quantitative features from magnetic resonance imaging (MRI) and magnetic resonance spectroscopic imaging of glioblastoma multiforme (GBM) results in tens of variables per patient...
November 15, 2016: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28007767/usefulness-of-non-contrast-enhanced-mr-angiography-using-a-silent-scan-for-follow-up-after-y-configuration-stent-assisted-coil-embolization-for-basilar-tip-aneurysms
#13
N Takano, M Suzuki, R Irie, M Yamamoto, N Hamasaki, K Kamagata, K K Kumamaru, M Hori, H Oishi, S Aoki
BACKGROUND AND PURPOSE: Y-configuration stent-assisted coil embolization is used for treating wide-neck aneurysms. Noninvasive alternatives to x-ray DSA for follow-up after Y-configuration stent-assisted coil embolization treatment are required. This study aimed to assess the usefulness of non-contrast-enhanced MRA by using a Silent Scan (silent MRA) for follow-up after Y-configuration stent-assisted coil embolization for basilar tip aneurysms. MATERIALS AND METHODS: Seven patients treated with Y-configuration stent-assisted coil embolization for basilar tip aneurysms underwent silent MRA, 3D TOF-MRA, and DSA...
December 22, 2016: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28005261/results-of-a-multicenter-survey-showing-interindividual-variability-among-neurosurgeons-when-deciding-on-the-radicality-of-surgical-resection-in-glioblastoma-highlight-the-need-for-more-objective-guidelines
#14
J Capellades, P Teixidor, G Villalba, C Hostalot, G Plans, R Armengol, S Medrano, A Estival, R Luque, S Gonzalez, M Gil-Gil, S Villa, J Sepulveda, J J García-Mosquera, C Balana
PURPOSE: We assessed agreement among neurosurgeons on surgical approaches to individual glioblastoma patients and between their approach and those recommended by the topographical staging system described by Shinoda. METHODS: Five neurosurgeons were provided with pre-surgical MRIs of 76 patients. They selected the surgical approach [biopsy, partial resection, or gross total resection (GTR)] that they would recommend for each patient. They were blinded to each other's response and they were told that patients were younger than 50 years old and without symptoms...
December 22, 2016: Clinical & Translational Oncology
https://www.readbyqxmd.com/read/28002169/fluoroscopic-guided-lumbar-spinal-drain-insertion-for-thoracic-aortic-aneurysm-surgery
#15
Hamdy Awad, Mohamed Ehab Ramadan, Esmerina Tili, Kathryn Hackett, Eric C Bourekas
We retrospectively reviewed the medical records of 11 patients who were referred by anesthesiologists to an interventional neuroradiologist for fluoroscopy-guided lumbar spinal drain insertion for thoracic aortic aneurysm repair between January 2010 and June 2015. Successful drain insertion was achieved in all patients. Three (27.3%) patients developed drain-related complications. Fluoroscopy-guided spinal drain insertion is an alternative to the conventional, nonimage-guided, blind technique used by anesthesiologists when they expect to encounter difficulty with insertion or in cases of failed insertion...
December 19, 2016: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28000558/coarse-classification-to-region-scalable-refining-for-white-matter-lesions-segmentation-in-multi-channel-mri
#16
Renping Yu, Liang Xiao, Zhihui Wei
Brain lesions, especially White Matter Lesions (WMLs) that mostly found on magnetic resonance images of elderly people, are not only associated with normal aging, but also with various geriatric disorders including cardiovascular diseases, vascular disease, psychiatric disorders and dementia. Quantitative analysis of WMLs in large clinical trials is crucial in scientific investigations of such neurological diseases as well as in studying aging processes. Exploiting the different appearances of WMLs in multiple modalities, we propose a novel coarse classification to region-scalable refining method to segment WMLs in Magnetic Resonance Imaging (MRI) sequences without user intervention...
December 20, 2016: CNS & Neurological Disorders Drug Targets
https://www.readbyqxmd.com/read/27998955/latest-generation-of-flat-detector-ct-as-a-peri-interventional-diagnostic-tool-a-comparative-study-with-multidetector-ct
#17
Johanna Rosemarie Leyhe, Ioannis Tsogkas, Amélie Carolina Hesse, Daniel Behme, Katharina Schregel, Ismini Papageorgiou, Jan Liman, Michael Knauth, Marios-Nikos Psychogios
BACKGROUND AND PURPOSE: Flat detector CT (FDCT) has been used as a peri-interventional diagnostic tool in numerous studies with mixed results regarding image quality and detection of intracranial lesions. We compared the diagnostic aspects of the latest generation FDCT with standard multidetector CT (MDCT). MATERIALS AND METHODS: 102 patients were included in our retrospective study. All patients had undergone interventional procedures. FDCT was acquired peri-interventionally and compared with postinterventional MDCT regarding depiction of ventricular/subarachnoidal spaces, detection of intracranial hemorrhage, and delineation of ischemic lesions using an ordinal scale...
December 20, 2016: Journal of Neurointerventional Surgery
https://www.readbyqxmd.com/read/27988034/bsnr-training-guidance-for-mechanical-thrombectomy
#18
R Lenthall, N McConachie, P White, A Clifton, C Rowland-Hill
No abstract text is available yet for this article.
February 2017: Clinical Radiology
https://www.readbyqxmd.com/read/27942466/the-2016-world-health-organization-classification-of-tumours-of-the-central-nervous-system-what-the-paediatric-neuroradiologist-needs-to-know
#19
EDITORIAL
Sahil Chhabda, Olivia Carney, Felice D'Arco, Thomas S Jacques, Kshitij Mankad
The recently published 2016 World Health Organization (WHO) classification of tumours of the Central Nervous System (CNS) introduces a number of significant changes from the previous edition. Based on an improved understanding of the genetic and molecular basis of tumorigenesis there has been a shift towards defining tumours by means of these characteristics in addition to their histological features, thus providing an integrated diagnosis. In this article, we will provide a concise overview of the salient changes in the 2016 WHO classification of tumours of the CNS that are of relevance to the paediatric neuroradiologist when it comes to day-to-day reporting...
October 2016: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/27928470/co2bold-assessment-of-moyamoya-syndrome-validation-with-single-photon-emission-computed-tomography-and-positron-emission-tomography-imaging
#20
Alain Pellaton, Philippe Bijlenga, Laurie Bouchez, Victor Cuvinciuc, Isabelle Barnaure, Valentina Garibotto, Karl-Olof Lövblad, Sven Haller
AIM: To compare the assessment of cerebrovascular reserve (CVR) using CO2BOLD magnetic resonance imaging (MRI) vs positron emission tomography (PET) and single photon emission computed tomography (SPECT) as reference standard. METHODS: Ten consecutive patients (8 women, mean age of 41 ± 26 years) with moyamoya syndrome underwent 14 pre-surgical evaluations for external-internal carotid artery bypass surgery. CVR was assessed using CO2BOLD and PET (4)/SPECT (11) with a maximum interval of 36 d, and evaluated by two experienced neuroradiologists...
November 28, 2016: World Journal of Radiology
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