Divya S. Bolar
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View article: Comparing the performance of DSC and ASL for Detecting Residual and Recurrent Glioblastoma with Deep Learning and multishell diffusion MRI
Comparing the performance of DSC and ASL for Detecting Residual and Recurrent Glioblastoma with Deep Learning and multishell diffusion MRI Open
Background Differentiating recurrent tumor from post-treatment changes remains a major challenge in glioblastoma (GBM) patients. In this work, we compared the performance of two different MR perfusion techniques, dynamic susceptibility con…
View article: Holo‐Stroke‐CTA: Stroke Hologram Teleportation for CTA Large Vessel Occlusion Assessments
Holo‐Stroke‐CTA: Stroke Hologram Teleportation for CTA Large Vessel Occlusion Assessments Open
Background Augmented reality enables visualization of and interaction with both physical and virtual environments. Holograms can allow 3‐dimensional image transmission to distant sites, allowing patients to interact with providers as if in…
View article: Evaluating post-treatment residual intracranial arteriovenous shunting: a comparison of arterial spin labeling MRI and digital subtraction angiography
Evaluating post-treatment residual intracranial arteriovenous shunting: a comparison of arterial spin labeling MRI and digital subtraction angiography Open
Purpose To evaluate the efficacy of arterial spin labeling (ASL) MRI in detecting residual arteriovenous (AV) shunting in treated arteriovenous malformations (AVMs) and fistulas (AVFs). Methods A retrospective institutional review identifi…
View article: MVP‐VSASL: measuring MicroVascular Pulsatility using velocity‐selective arterial spin labeling
MVP‐VSASL: measuring MicroVascular Pulsatility using velocity‐selective arterial spin labeling Open
Purpose By leveraging the small‐vessel specificity of velocity‐selective arterial spin labeling (VSASL), we present a novel technique for measuring cerebral MicroVascular Pulsatility named MVP‐VSASL. Theory and Methods We present a theoret…
View article: A generalized signal model for dual‐module velocity‐selective arterial spin labeling
A generalized signal model for dual‐module velocity‐selective arterial spin labeling Open
Purpose To develop a generalized signal model for dual‐module velocity‐selective arterial spin labeling (dm‐VSASL) that can integrate arbitrary saturation and inversion profiles. Theory and Methods A recently developed mathematical framewo…
View article: Reduced <scp>B<sub>0</sub></scp>/<scp>B<sub>1</sub></scp><sup>+</sup> sensitivity in velocity‐selective inversion arterial spin labeling using adiabatic refocusing pulses
Reduced <span>B<sub>0</sub></span>/<span>B<sub>1</sub></span><sup>+</sup> sensitivity in velocity‐selective inversion arterial spin labeling using adiabatic refocusing pulses Open
Purpose To mitigate the B 0 /B 1 + sensitivity of velocity‐selective inversion (VSI) pulse trains for velocity‐selective arterial spin labeling (VSASL) by implementing adiabatic refocusing. This approach aims to achieve artifact‐free VSI‐b…
View article: MVP-VSASL: measuring MicroVascular Pulsatility using Velocity-Selective Arterial Spin Labeling
MVP-VSASL: measuring MicroVascular Pulsatility using Velocity-Selective Arterial Spin Labeling Open
1 Abstract Purpose By leveraging the small-vessel specificity of velocity-selective arterial spin labeling (VSASL), we present a novel technique for measuring cerebral MicroVascular Pulsatility named MVP-VSASL. Theory and Methods We presen…
View article: A Generalized Signal Model for Dual-Module Velocity-Selective Arterial Spin Labeling
A Generalized Signal Model for Dual-Module Velocity-Selective Arterial Spin Labeling Open
Purpose To develop a generalized signal model for dual-module velocity-selective arterial spin labeling (dm-VSASL) that can integrate arbitrary saturation and inversion profiles. Theory and Methods A recently developed mathematical framewo…
View article: Multicenter comparison using two AI stroke CT perfusion software packages for determining thrombectomy eligibility
Multicenter comparison using two AI stroke CT perfusion software packages for determining thrombectomy eligibility Open
View article: Erratum to: Velocity‐selective arterial spin labeling perfusion <scp>MRI</scp>: A review of the state of the art and recommendations for clinical implementation (Magn Reson Med. 2022; 88:1528–1547)
Erratum to: Velocity‐selective arterial spin labeling perfusion <span>MRI</span>: A review of the state of the art and recommendations for clinical implementation (Magn Reson Med. 2022; 88:1528–1547) Open
In the fifth paragraph of Section 9.1, the text "For FT-VSI, Vcut is also defined as the first crossing of ΔM = 1,30 but for the velocity response without an assumption of laminar flow (in a plug flow condition) (Figure 6E). This is also t…
View article: Recommendations for quantitative cerebral perfusion <scp>MRI</scp> using multi‐timepoint arterial spin labeling: Acquisition, quantification, and clinical applications
Recommendations for quantitative cerebral perfusion <span>MRI</span> using multi‐timepoint arterial spin labeling: Acquisition, quantification, and clinical applications Open
Accurate assessment of cerebral perfusion is vital for understanding the hemodynamic processes involved in various neurological disorders and guiding clinical decision‐making. This guidelines article provides a comprehensive overview of qu…
View article: Arterial spin labeled perfusion MRI for the assessment of radiation-treated meningiomas
Arterial spin labeled perfusion MRI for the assessment of radiation-treated meningiomas Open
Purpose Conventional contrast-enhanced MRI is currently the primary imaging technique used to evaluate radiation treatment response in meningiomas. However, newer perfusion-weighted MRI techniques, such as 3D pseudocontinuous arterial spin…
View article: The influence of orbital architecture on strabismus in craniosynostosis
The influence of orbital architecture on strabismus in craniosynostosis Open
In our small cohort, bony orbital dimensions, including the ratio of orbital height to width and bowing of the medial orbital wall, were associated with strabismus in craniosynostosis.
View article: A mathematical model for velocity‐selective arterial spin labeling
A mathematical model for velocity‐selective arterial spin labeling Open
Purpose To present a theoretical framework that rigorously defines and analyzes key concepts and quantities for velocity selective arterial spin labeling (VSASL). Theory and Methods An expression for the VSASL arterial delivery function is…
View article: Recommendations for Quantitative Cerebral Perfusion MRI using Multi-Timepoint Arterial Spin Labeling: Acquisition, Quantification, and Clinical Applications
Recommendations for Quantitative Cerebral Perfusion MRI using Multi-Timepoint Arterial Spin Labeling: Acquisition, Quantification, and Clinical Applications Open
Accurate assessment of cerebral perfusion is vital for understanding the hemodynamic processes involved in various neurological disorders and guiding clinical decision-making. This guidelines article provides a comprehensive overview of qu…
View article: A mathematical model for velocity-selective arterial spin labeling
A mathematical model for velocity-selective arterial spin labeling Open
Purpose To present a theoretical framework that rigorously defines and analyzes key concepts and quantities for velocity selective arterial spin labeling (VSASL). Theory and Methods An expression for the VSASL arterial delivery function is…
View article: Current state and guidance on arterial spin labeling perfusion <scp>MRI</scp> in clinical neuroimaging
Current state and guidance on arterial spin labeling perfusion <span>MRI</span> in clinical neuroimaging Open
This article focuses on clinical applications of arterial spin labeling (ASL) and is part of a wider effort from the International Society for Magnetic Resonance in Medicine (ISMRM) Perfusion Study Group to update and expand on the recomme…
View article: Viz.ai Implementation of Stroke Augmented Intelligence and Communications Platform to Improve Indicators and Outcomes for a Comprehensive Stroke Center and Network
Viz.ai Implementation of Stroke Augmented Intelligence and Communications Platform to Improve Indicators and Outcomes for a Comprehensive Stroke Center and Network Open
There was an immediate improvement following Viz.ai implementation for both direct arriving and telemedicine transfer thrombectomy cases. In the greatest opportunity subset (direct arriving large-vessel occlusion-OffHours: direct arriving …
View article: Erratum to: Velocity‐selective arterial spin labeling perfusion <scp>MRI</scp>: A review of the state of the art and recommendations for clinical implementation (Magn Reson Med. 2022; 88:1528–1547)
Erratum to: Velocity‐selective arterial spin labeling perfusion <span>MRI</span>: A review of the state of the art and recommendations for clinical implementation (Magn Reson Med. 2022; 88:1528–1547) Open
Peer Reviewed
View article: Recent Technical Developments in ASL: A Review of the State of the Art
Recent Technical Developments in ASL: A Review of the State of the Art Open
This review article provides an overview of a range of recent technical developments in advanced arterial spin labeling (ASL) methods that have been developed or adopted by the community since the publication of a previous ASL consensus pa…
View article: Velocity‐selective arterial spin labeling perfusion MRI: A review of the state of the art and recommendations for clinical implementation
Velocity‐selective arterial spin labeling perfusion MRI: A review of the state of the art and recommendations for clinical implementation Open
This review article provides an overview of the current status of velocity‐selective arterial spin labeling (VSASL) perfusion MRI and is part of a wider effort arising from the International Society for Magnetic Resonance in Medicine (ISMR…
View article: VESPA ASL: VElocity and SPAtially Selective Arterial Spin Labeling
VESPA ASL: VElocity and SPAtially Selective Arterial Spin Labeling Open
This repository contains the simulation code, in vivo data, preprocessing code, and analysis code used in the Magnetic Resonance in Medicine article titled "VESPA ASL: VElocity and SPAtially Selective Arterial Spin Labeling" (https://doi.o…
View article: VESPA ASL: VElocity and SPAtially Selective Arterial Spin Labeling
VESPA ASL: VElocity and SPAtially Selective Arterial Spin Labeling Open
This repository contains the simulation code, in vivo data, preprocessing code, and analysis code used in the Magnetic Resonance in Medicine article titled "VESPA ASL: VElocity and SPAtially Selective Arterial Spin Labeling"…
View article: VESPA ASL: VElocity and SPAtially Selective Arterial Spin Labeling
VESPA ASL: VElocity and SPAtially Selective Arterial Spin Labeling Open
This repository contains the simulation code, in vivo data, preprocessing code, and analysis code used in the Magnetic Resonance in Medicine article titled "VESPA ASL: VElocity and SPAtially Selective Arterial Spin Labeling" (https://doi.o…
View article: Cerebral Perfusion in Posterior Reversible Encephalopathy Syndrome Measured with Arterial Spin Labeling MRI
Cerebral Perfusion in Posterior Reversible Encephalopathy Syndrome Measured with Arterial Spin Labeling MRI Open
View article: Cerebral perfusion in posterior reversible encephalopathy syndrome measured with arterial spin labeling MRI
Cerebral perfusion in posterior reversible encephalopathy syndrome measured with arterial spin labeling MRI Open
Elevated ASL CBF was seen in the majority (65%) of patients with PRES, favoring the autoregulatory failure hypothesis as a predominant mechanism. Our data support ASL as a practical way to assess and noninvasively monitor cerebral perfusio…
View article: Apparent posterior cerebral artery territory perfusion asymmetry on arterial spin labeling MRI is a common non-pathologic finding in patients with a unilateral fetal posterior cerebral artery
Apparent posterior cerebral artery territory perfusion asymmetry on arterial spin labeling MRI is a common non-pathologic finding in patients with a unilateral fetal posterior cerebral artery Open
Purpose To determine the frequency of apparent posterior cerebral artery (PCA) territory asymmetry seen on arterial spin labeling (ASL) imaging in patients with a unilateral fetal PCA, but without underlying clinical or imaging pathology t…
View article: Comparison of CBF Measured with Combined Velocity-Selective Arterial Spin-Labeling and Pulsed Arterial Spin-Labeling to Blood Flow Patterns Assessed by Conventional Angiography in Pediatric Moyamoya
Comparison of CBF Measured with Combined Velocity-Selective Arterial Spin-Labeling and Pulsed Arterial Spin-Labeling to Blood Flow Patterns Assessed by Conventional Angiography in Pediatric Moyamoya Open
Velocity-selective arterial spin-labeling offers a powerful approach to image perfusion in pediatric moyamoya due to transit delay insensitivity. Coupled with pulsed arterial spin-labeling for transit delay information, a volumetric MR ima…
View article: Assessing the effects of subject motion on T<sub>2</sub> relaxation under spin tagging (TRUST) cerebral oxygenation measurements using volume navigators
Assessing the effects of subject motion on T<sub>2</sub> relaxation under spin tagging (TRUST) cerebral oxygenation measurements using volume navigators Open
Purpose Subject motion may cause errors in estimates of blood T 2 when using the T 2 ‐relaxation under spin tagging (TRUST) technique on noncompliant subjects like neonates. By incorporating 3D volume navigators (vNavs) into the TRUST puls…
View article: NIMG-38. MAPPING OF BRAIN TUMOR OXYGEN METABOLISM IN NATIVE MRI
NIMG-38. MAPPING OF BRAIN TUMOR OXYGEN METABOLISM IN NATIVE MRI Open
Since hypoxia makes tumors more aggressive and therapy resistant, characterizing blood supply and oxygen consumption may be crucial information for therapy planning and outcome prediction. A new promising method: QUantitative Imaging of eX…