Practical Pearl: Use of MRI to Differentiate Pseudo-subarachnoid Hemorrhage from True Subarachnoid Hemorrhage. For both readers, the sensitivity for lesion detection was high for all image types but highest for overlapping CUBE MIP and CUBE (0.93-0.97).This study suggests that the use of overlapping CUBE MIP or nonoverlapping CUBE MIP for the detection of brain metastases can reduce interpretation time without sacrificing sensitivity, though the contrast-to-noise ratio of lesions is highest for overlapping CUBE MIP. Health Care. View details for DOI 10.1016/j.ijrobp.2019.10.002. To Michael and Alexander . RESULTS Assigned Spetzler-Martin grades for AVMs on DSA, fe-SPGR, and CTA were not significantly different (p = 0.991). Advanced imaging techniques including computed tomography (CT) angiography, CT perfusion, magnetic resonance (MR) angiography, MR with diffusion- and perfusion-weighted imaging, and, more recently, resting-state BOLD (Blood Oxygen Level Dependent) functional MRI (rs-fMRI) are increasingly used to evaluate patients with acute ischemic stroke. Thomas, R. P., Nagpal, S., Iv, M., Soltys, S. G., Bertrand, S., Pelpola, J. S., Ball, R. L., Yang, J., Sundaram, V., Lavezo, J. L., Born, D. E., Vogel, H., Brown, J. M., Recht, L. Utility of a Quantitative Approach Using Diffusion Tensor Imaging for Prognostication Regarding Motor and Functional Outcomes in Patients With Surgically Resected Deep Intracranial Cavernous Malformations. , CA We review CT and MRI evaluation of intracranial hemorrhage with the goal of providing a broad overview of the diverse causes and varied appearances of intracranial hemorrhage. Association of developmental venous anomalies with perfusion abnormalities on arterial spin labeling and bolus perfusion-weighted imaging. Of the 30patients, 67% were women; 70% were nonsmokers; 27% initially presented with LM; 84% received systemic treatment at or after development of LM; and 53% of these patients received modern systemic therapy for their LM, defined as a regimen containing pemetrexed, bevacizumab, or a tyrosine kinase inhibitor. Law. Interpretation time for CUBE MIPs was significantly shorter than for CUBE and IR-FSPGR-BRAVO, saving at least 50 seconds per case on average (P < .001). Conclusion No overall significant differences were found in susceptibility and R2* values of deep gray structures to suggest retained iron in the brain between ferumoxytol-exposed and unexposed children and young adults with arteriovenous malformations and in those exposed to ferumoxytol over time. View details for Web of Science ID 000319447700046. At histopathologic analysis, iron particles were found only in macrophages; none was found in glial fibrillary acidic protein-positive tumor cells. Simultaneous time of flight-MRA and T2* imaging for cerebrovascular MRI. Jump to: Criminal Records, Social Media. Prussian blue stains of the same brain regions, scored according to a semiquantitative score, were not significantly different either between the ferumoxytol exposed group and unexposed controls (p>0.05). Gupta, N. A., Iv, M., Pandit, R. P., Patel, M. R. Prolonged survival of patients with non-small-cell lung cancer with leptomeningeal carcinomatosis in the modern treatment era. View details for DOI 10.1016/j.wneu.2019.11.051. Angiogenesis and hypoxia pathways were enriched in this subgroup of patients, suggesting the potential efficacy of antiangiogenic therapy. Statistical analyses were performed using generalized linear models.No significant difference was found between CSF metal levels across diagnostic groups. Radiomics in Brain Tumor: Image Assessment, Quantitative Feature Descriptors, and Machine-Learning Approaches. MR imaging is key to tumor detection, diagnosis, and therapy guidance. Economic History. Our mean functional MR imaging acquisition time was reduced from 76.3 to 53.2 minutes, while our functional MR imaging examinations remained of diagnostic quality. DWI and PWI images alone were anonymized and scored for cerebral infarction, LVO presence and LVO location, DWI-PWI mismatch, and ET candidacy. Follow-up DSA confirmed arteriovenous shunting in 71% of ASL-positive venous anomalies. View details for DOI 10.1080/10976640701693642, View details for Web of Science ID 000251394000007. Deep Learning for Pediatric Posterior Fossa Tumor Detection and Classification: A Multi-Institutional Study. View details for DOI 10.1016/j.cllc.2013.12.009. View details for DOI 10.1097/RMR.0000000000000062. Read the latest >, Información sobre el coronavirus 2019 (COVID-19). (Stanford users can avoid this Captcha by logging in.) An increase in CSF iron with the number of CMBs was seen in APOE4 carriers.CSF iron levels are elevated with cerebral microbleeds in APOE4 carriers, with no other association seen with hemorrhagic markers of small vessel disease. Intermodality agreement was excellent between Fe-SPGR and DSA ( = 1.00) but poor between ASL and DSA ( = 0.53; 95% CI 0.18-0.89). Unsupervised consensus clustering was performed to identify robust clusters of GBM in each cohort. Deep learning model performance was compared against that of 4 radiologists.Model tumor detection accuracy exceeded an AUROC of 0.99 and was similar to that of 4 radiologists. Exclusion criteria included: 1) baseline or follow-up axial images were not available for review 2) baseline scan was obtained without contrast 3) diagnosis of meningioma was uncertain. AUC for using normalized TBF to identify tumor vascularity on DSA was 0.82 (95% CI, 0.72-0.91), and a normalized TBF cut point of 2.7 yielded 88% sensitivity and 67% specificity. Send Cancel Tod und Auferstehung Jesu Christi bei Iuvencus IV 570-812 : Untersuchungen zu Dichtkunst, Theologie und … Newer MRI sequences have been developed to increase the conspicuity of detecting enhancing metastases. Although some lesions can be diagnosed on clinical grounds, others can only be diagnosed by imaging. Future efforts would be directed toward better understanding therapeutic mechanisms and optimizing rTMS for treatment of MCI. Optimization of patient care requires accurate diagnosis, which can be challenging as congenital brain malformations include an extensive variety of anomalies. This study aimed to evaluate the benefits of thick-slab overlapping MIPs constructed from contrast-enhanced T1-weighted CUBE (overlapping CUBE MIP) for the detection of brain metastases in comparison with traditional CUBE and inversion-recovery prepared fast-spoiled gradient recalled brain volume (IR-FSPGR-BRAVO) and nonoverlapping CUBE MIP.A retrospective review of 48 patients with cerebral metastases was performed at our institution from June 2016 to October 2017. Zeineh, Michael, Associate Professor of Radiology at the Stanford University Medical Center, for the period June 1, 2020 through May 31, 2025 OTHER REAPPOINTMENTS: Imaging Manifestations of Primary and Disseminated Coccidioidomycosis, Clinical applications of iron oxide nanoparticles for magnetic resonance imaging of brain tumors, Congenital Brain Malformations in the Neonatal and Early Infancy Period, Imaging Neck Masses in the Neonate and Young Infant, Intensity-Corrected Dual-Echo Echo-Planar Imaging (DE-EPI) for Improved Pediatric Brain Diffusion Imaging. Receiver operating characteristic analysis revealed superior performance of the double 10-fold cross-validation model for predicting sonic hedgehog, group 3, and group 4 tumors when using combined T1- and T2-weighted images (area under the curve = 0.79, 0.70, and 0.83, respectively). View details for DOI 10.1053/j.sult.2015.01.004, View details for Web of Science ID 000355575300003. Elizabeth Tong MD. Surprising Things You Didn't Know About Dogs and Cats Conclusion MRI measurements of susceptibility, R2*, and R2' (R2* - R2) obtained after ferumoxytol administration correlate with iron-containing macrophage concentration, and this shows their potential as quantitative imaging markers of macrophages in malignant gliomas. There were 199 controls. For each patient, change in tumor size over time was compared using T1+contrast, T2, and T2 FLAIR sequences. The resulting features can be used to inform imaging diagnosis, prognosis, and therapy response in oncology. Kroll, H., Zaharchuk, G., Christen, T., Heit, J. J., Iv, M. Reducing Functional MR Imaging Acquisition Times by Optimizing Workflow. Pig brains were sectioned and stained with Prussian blue and evaluated for iron deposition using a semiquantitative scoring system. Our purpose is to describe the association between demyelinating lesions and venous anomalies, as only one case of TD associated with a DVA has been published in the literature. Liu, T. T., Achrol, A. S., Mitchell, L. A., Rodriguez, S. A., Feroze, A., Kim, C., Chaudhary, N., Gevaert, O., Stuart, J. M., Harsh, G. R., Chang, S. D., Rubin, D. L. Central Nervous System Perfusion Patterns in Childhood Langerhans Cell Histiocytosis. Stanford faculty — from all schools and institutes — are working together on research that can help alleviate global poverty. Michael Braun PhD Candidate and NSF Graduate Research Fellow at Stanford University San Francisco Bay Area 167 connections STANFORD GEOTHERMAL PROGRAM STANFORD UNIVERSITY STANFORD, CALlFORNlA 94305 Stanford Geothermal Program Interdisciplinary Research in Engineering and Earth Sciences STANFORD UNIVERSITY Stanford, … Michael Stanford, Actor: Contagion. We report on the accuracy of electrode placement under robotic assistance planning utilizing a novel high-resolution magnetic resonance imaging (MRI)-based imaging modality.Sixteen pediatric patients between February 2014 and October 2017 underwent SEEG exploration for epileptogenic zone localization. Development and Validation of Operator Independent Measurements of Optic Nerve Sheath Cerebral Spinal Fluid Volume from MRI. He was the nephew and successor of Michael IV and the adoptive son of his wife Empress Zoe.He was popularly called "the Caulker" (Καλαφάτης, Kalaphates) in accordance with his father's original occupation. Physiological motion of the optic chiasm and its impact on stereotactic radiosurgery dose. He was also a co-editor of a published two volume book set entitled “Glioblastoma: State-of-the-Art Clinical Neuroimaging.” In addition to research, he is actively involved in the clinical care of patients and regularly participates in multi-disciplinary conferences. The purposes of this study were to identify individual toxicants in cigarette smoke solutions that inhibit various aspects of oviductal functioning and to determine their effective doses using in vitro bioassays. Read more. The purpose of this study was to evaluate the feasibility and reliability of software-based quantification of left ventricular function using 64-slice CT coronary angiography. Page 1 of 7 Michael Iv Clinical Associate Professor, Radiology CLINICAL OFFICES • Stanford Neuroimaging and Neurointervention 300 Pasteur Dr Rm S031E MC 5105 Stanford, CA 94305 Bio Tel (650) 725-5384 Fax (650) 723-1909 BIO Dr. Michael Iv received his medical degree from the David Geffen School of Medicine at UCLA. We suggest iron oxide nanoparticles as a promising alternative for gadolinium-enhanced MRI. Lammering, J. C., Iv, M., Gupta, N., Pandit, R., Patel, M. R. Comparison of Readout-Segmented Echo-Planar Imaging (EPI) and Single-Shot EPI in Clinical Application of Diffusion-Weighted Imaging of the Pediatric Brain. Past studies showed that chemicals in cigarette smoke inhibit oviductal functioning in vivo and in vitro. The addition of rs-fMRI for ischemia adds information at the microvascular level, thereby improving the understanding of pathophysiologic mechanisms of impaired cerebral perfusion and tissue oxygenation beyond the known concepts at the macrovascular level. The mother of a Briton accused of trying to grab a policeman's gun in a bid to kill Donald Trump has pleaded for her son's return to the UK after he was placed on suicide watch in prison. Radiologic imaging helps to identify the malformations and to guide management. For non-entry point intersections, 45 intersected vessels were measured. LVO were accurately localized to the ICA/M1 segment in 65 of 68 patients (96%; =0.922; P=0.817) and the M2 segment in 18 of 20 patients (90%; =0.830; P=0.529).AIS patients with anterior circulation LVO are accurately identified using DWI and PWI alone, and LVO location may be correctly inferred from PWI. Clinical trials are research studies that evaluate a new medical approach, device, drug, or other treatment. Dr. Michael Iv received his medical degree from the David Geffen School of Medicine at UCLA. Michael Iv MD. The apparent diffusion coefficient (ADC) map from Echo1 was used to validate presence of true pathology. Neurologic complications of COVID-19 infection have been recently described and include dizziness, headache, loss of taste and smell, stroke, and encephalopathy. Mean fractional anisotropy (FA) values were obtained for whole ipsilateral CST and in 3 regions: subcortical (proximal), perilesional, and distally. COVID-19 Updates:      COVID-19 Resources »      Vaccine Update »      Updated Visitor Policy »      What We're Doing to Keep You Safe ». Narrow Your Results . RSNA, 2020. Gadolinium deposition has raised safety concerns, but it is unknown whether ferumoxytol administration also deposits in the brain. Non-Contrast T2-Weighted MR Sequences for Long Term Monitoring of Asymptomatic Convexity Meningiomas. Two readers also evaluated full-Fourier variable refocusing flip angle single-shot FSE against T2-FSE for brain lesion detectability in 38 children.Variable refocusing flip angle single-shot FSE sequences showed more motion artifacts (P View details for DOI 10.3174/ajnr.A6616 View details for PubMedID 32586967, View details for Web of Science ID 000509478700102. DWI and PWI alone had a 95.9% sensitivity and a 98.4% specificity for accurate endovascular triage. Nine to twelve months later, pigs were sacrificed and the brains of all pigs underwent ex vivo MRI at 7T with T2 and T2*-weighted sequences. Prolonged survival of patients with non-small-cell lung cancer with leptomeningeal carcinomatosis in the modern treatment era. Overall, the inter-rater agreement between two readers for lesion count on pTOF was classified as almost perfect (=0.98, 96% CI 0.8-1.0).In this study, TOF-MRA simultaneously generated in addition to SWI from 3D MR-GRE can serve as a diagnostic adjunct, particularly for proximal vessel disease and when conventional TOF-MRA images are absent. Methods: In an animal care and use committee-approved prospective case-control study, ten Gttingen minipigs received either intravenous ferumoxytol injections at a dose of 5 mg Fe/kg (n=4) or remained untreated (n=6). Median overall survival was 21.3 months (95% Confidence Interval (CI) 15.9, NA) with a progression-free survival of 14.5 months (95% CI 11.8, NA). Michael Jin MD Student, expected graduation Spring 2023 . Perfusion MRI-Based Fractional Tumor Burden Differentiates between Tumor and Treatment Effect in Recurrent Glioblastomas and Informs Clinical Decision-Making. Mean susceptibility and R2* values of regions of interests were recorded. Clinical and Arterial Spin Labeling Brain MRI Features of Transitional Venous Anomalies. In addition, we aimed to analyze CSF biomarkers for dementia and associations with CSF metal levels.This is a cross-sectional study of 196 patients who underwent memory clinic investigation, including brain MRI. We will randomize participants to one of three groups: (1) Active DLPFC rTMS; (2) Active LPC rTMS; and (3) Sham rTMS (evenly split between DLPFC and LPC locations). Diffusion Tensor Imaging of TBI: Potentials and Challenges. Check Michael's background report, court, criminal and arrest records. The mean diameter for involved vessels was 0.9826 0.1008 mm.We believe this novel sequence allows better identification of superficial and deeper subcortical vessels compared to conventional T1-weighted gadolinium-enhanced MRI. View details for Web of Science ID 000415152502222, View details for Web of Science ID 000415152503005. Our findings demonstrate that a brief self-guided training module distinguishing nLMD can significantly improve IRR across all patterns of recurrence, and particularly in nLMD. Congenital brain malformations are a major cause of morbidity and mortality in pediatric patients who are younger than 2 years. 3D multi-echo gradient-recalled echo (ME-GRE) can simultaneously generate time-of-flight magnetic resonance angiography (pTOF) in addition to T2*-based susceptibility-weighted images (SWI). In 17 out of 18 patients, measurement of non-contrast studies (T2 and T2 FLAIR) matched consensus. The mean number of ferumoxytol administrations was 2 1 (range, one to four). After a self-directed training module, participating physicians completed the "post-training" phase and relabeled the 30 cases using the 4 following labels: LR, DR, cLMD, nLMD.Inter-rater reliability (IRR) increased 34% after training (Fleiss' Kappa K=0.41 to K=0.55, p<0.001). On coronal images, the average superior-inferior displacement was 0.42mm (95%CI 0.13 - 0.71mm), and the average lateral displacement was 0.75mm (95%CI 0.42 - 1.08mm). IRR increased most among non-CNS specialists (+58%, p<0.001). Michael IV the Paphlagonian (Greek: Μιχαὴλ (Δ´) ὁ Παφλαγών, Mikhaēl ho Paphlagōn; c. 1010 – 10 December 1041) was Byzantine Emperor from 11 April 1034 to his death on 10 December 1041.. A modified ResNeXt-50-32x4d architecture served as the backbone for a multitask classifier model, using T2-weighted MRIs as input to detect the presence of tumor and predict tumor class. Advances in 3-dimensional (3D) printing technology permit the rapid creation of detailed anatomical models. Yet, in both MCI and AD, we know little about what site of stimulation would be ideal for improving cognitive function. In addition, a random audit of the 800 DXA scans that have been reported with this technique demonstrated no reports generated under an incorrect accession number and no incorrect transfer of data. The model was most accurate at predicting diffuse midline glioma of the pons, followed by pilocytic astrocytoma and medulloblastoma. The process of verbally reporting or manually retyping numeric data generated at dual-energy x-ray absorptiometry (DXA) involves numerous pitfalls. MR Imaging-Based Radiomic Signatures of Distinct Molecular Subgroups of Medulloblastoma. In participants who underwent at least two brain MRI examinations (subgroup), the first and last available examinations were analyzed. He leads Stanford’s research efforts in MRI of breast cancer and MRI-guided interventions. Iv, M., Zhou, M., Shpanskaya, K., Perreault, S., Wang, Z., Tranvinh, E., Lanzman, B., Vajapeyam, S., Vitanza, N. A., Fisher, P. G., Cho, Y. J., Laughlin, S., Ramaswamy, V., Taylor, M. D., Cheshier, S. H., Grant, G. A., Young Poussaint, T., Gevaert, O., Yeom, K. W. Evaluation of Thick-Slab Overlapping MIP Images of Contrast-Enhanced 3D T1-Weighted CUBE for Detection of Intracranial Metastases: A Pilot Study for Comparison of Lesion Detection, Interpretation Time, and Sensitivity with Nonoverlapping CUBE MIP, CUBE, and Inversion-Recovery-Prepared Fast-Spoiled Gradient Recalled Brain Volume. Utility of a Quantitative Approach Using Diffusion Tensor Imaging for Prognostication Regarding Motor and Functional Outcomes in Patients With Surgically Resected Deep Intracranial Cavernous Malformations. The lowest observable adverse effect level was determined for each pyridine derivative using the oocyte pick-up rate, ciliary beat frequency, and infundibular muscle contraction assays. Feng, A. Y., Ho, A. L., Kim, L. H., Sussman, E. S., Pendharkar, A. V., Iv, M., Yeom, K. W., Halpern, C. H., Grant, G. A. Displaying 1 - 126 of 126 . Prior to training, IRR was lowest for LMD (K=0.33). Computed tomography (CT) angiography and digital subtraction angiography are commonly used, but recent developments in magnetic resonance angiography allow for high-resolution vascular visualization without added risks of radiation. Brain MRI in these patients have revealed various findings including ischemia, hemorrhage, inflammation, and demyelination. Bruce is an Instructor for the “Clinical Needs and Technology” graduate course in the Bioengineering Department of the Schools of Engineering, and Medicine, and has been a mentor and advocate for many trainees and students across schools. 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Details for DOI 10.1016/j.pediatrneuro1.2018.05.008, view details for Web of Science ID 000355575300003 plays... At the Stanford brain tumor Center treatment of CNS malignancies over lifetime recurrent after a bevacizumab-containing.. Iv to book an appointment, and Machine-Learning Approaches reporting or manually retyping numeric data generated at x-ray... Coronary data using the new analysis software is rapid and easy the potential efficacy of Fe-MRI as platform. Medical approach, device, drug, or for education of trainees imaging review and investigator training these, underwent... Stereoelectroencephalography planning in Children: a statistical analysis in 372 patients tool to identify TVAs and further! In regions close to the head coil 3-ethylpyridine, and intermodality reliability were determined using DSA as! Poor prognosis, with death usually occurring within 1 year with non-small-cell lung cancer ( )! 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