Search Results - "KARIS, J. P"

Relative Cerebral Blood Volume Values to Differentiate High-Grade Glioma Recurrence from Posttreatment Radiation Effect: Direct Correlation between Image-Guided Tissue Histopathology and Localized Dynamic Susceptibility-Weighted Contrast-Enhanced Perfusion MR Imaging Measurements by Hu, L.S, Baxter, L.C, Smith, K.A, Feuerstein, B.G, Karis, J.P, Eschbacher, J.M, Coons, S.W, Nakaji, P, Yeh, R.F, Debbins, J, Heiserman, J.E

“…Differentiating tumor growth from posttreatment radiation effect (PTRE) remains a common problem in neuro-oncology practice. To our knowledge, useful threshold…”
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Correlations between Perfusion MR Imaging Cerebral Blood Volume, Microvessel Quantification, and Clinical Outcome Using Stereotactic Analysis in Recurrent High-Grade Glioma by HU, L. S, ESCHBACHER, J. M, NAKAJI, P, DEBBINS, J, FEUERSTEIN, B. G, BAXTER, L. C, DUECK, A. C, HEISERMAN, J. E, LIU, S, KARIS, J. P, SMITH, K. A, SHAPIRO, W. R, PINNADUWAGE, D. S, COONS, S. W

“…Quantifying MVA rather than MVD provides better correlation with survival in HGG. This is attributed to a specific "glomeruloid" vascular pattern, which is…”
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Optimized Preload Leakage-Correction Methods to Improve the Diagnostic Accuracy of Dynamic Susceptibility-Weighted Contrast-Enhanced Perfusion MR Imaging in Posttreatment Gliomas by Hu, L.S, Baxter, L.C, Pinnaduwage, D.S, Paine, T.L, Karis, J.P, Feuerstein, B.G, Schmainda, K.M, Dueck, A.C, Debbins, J, Smith, K.A, Nakaji, P, Eschbacher, J.M, Coons, S.W, Heiserman, J.E

“…Relative cerebral blood volume (rCBV) accuracy can vary substantially depending on the dynamic susceptibility-weighted contrast-enhanced (DSC) acquisition and…”
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Noninvasive Imaging of Treated Cerebral Aneurysms, Part I: MR Angiographic Follow-Up of Coiled Aneurysms by Wallace, R.C, Karis, J.P, Partovi, S, Fiorella, D

“…MRA is emerging as an alternative to conventional catheter based angiography for the assessment of aneurysms after endovascular treatment. Short TE and…”
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MR Imaging of Papillary Tumor of the Pineal Region by Chang, A.H, Fuller, G.N, Debnam, J.M, Karis, J.P, Coons, S.W, Ross, J.S, Dean, B.L

“…We report the imaging features of 4 cases of patients with papillary tumor of the pineal region, a tumor newly recognized in the 2007 World Health Organization…”
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Noninvasive Imaging of Treated Cerebral Aneurysms, Part II: CT Angiographic Follow-Up of Surgically Clipped Aneurysms by Wallace, R.C, Karis, J.P, Partovi, S, Fiorella, D

“…Although not useful for the evaluation of coiled aneurysms, CT angiography (CTA) is far superior to MR angiography (MRA) for the evaluation of aneurysms after…”
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Introduction of a Dedicated Emergency Department MR Imaging Scanner at the Barrow Neurological Institute by Buller, M, Karis, J P

“…Use of advanced imaging in the emergency department has been increasing in the United States during the past 2 decades. This trend has been most notable in CT,…”
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Evaluation of Motion-Corrected Multishot Echo-Planar Imaging as an Alternative to Gradient Recalled-Echo for Blood-Sensitive Imaging by Murchison, J A, Shoshan, D, Ooi, M B, Li, Z, Karis, J P

“…We evaluated motion-corrected multishot EPI compared with gradient recalled-echo imaging to determine whether it can be used as a faster technique for…”
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Spinal Coccidioidomycosis: MR Imaging Findings in 41 Patients by Crete, R N, Gallmann, W, Karis, J P, Ross, J

“…is a dimorphic fungus endemic to the Southwest United States and Mexico, and at our institution, it is a relatively common pathogen presenting with a broad…”
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Differentiating recurrent tumor from radiation necrosis: time for re- evaluation of positron emission tomography? by Ricci, PE, Karis, JP, Heiserman, JE, Fram, EK, Bice, AN, Drayer, BP

“…Our purpose was to evaluate the ability of FDG PET to differentiate recurrent tumor from posttherapy radiation necrosis. MR images, PET scans, and medical…”
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Reevaluating the imaging definition of tumor progression: perfusion MRI quantifies recurrent glioblastoma tumor fraction, pseudoprogression, and radiation necrosis to predict survival by Hu, Leland S, Eschbacher, Jennifer M, Heiserman, Joseph E, Dueck, Amylou C, Shapiro, William R, Liu, Seban, Karis, John P, Smith, Kris A, Coons, Stephen W, Nakaji, Peter, Spetzler, Robert F, Feuerstein, Burt G, Debbins, Josef, Baxter, Leslie C

“…Contrast-enhanced MRI (CE-MRI) represents the current mainstay for monitoring treatment response in glioblastoma multiforme (GBM), based on the premise that…”
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A Spiral Spin-Echo MR Imaging Technique for Improved Flow Artifact Suppression in T1-Weighted Postcontrast Brain Imaging: A Comparison with Cartesian Turbo Spin-Echo by Li, Z, Hu, H H, Miller, J H, Karis, J P, Cornejo, P, Wang, D, Pipe, J G

“…A challenge with the T1-weighted postcontrast Cartesian spin-echo and turbo spin-echo brain MR imaging is the presence of flow artifacts. Our aim was to…”
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Accurate Patient-Specific Machine Learning Models of Glioblastoma Invasion Using Transfer Learning by Hu, L S, Yoon, H, Eschbacher, J M, Baxter, L C, Dueck, A C, Nespodzany, A, Smith, K A, Nakaji, P, Xu, Y, Wang, L, Karis, J P, Hawkins-Daarud, A J, Singleton, K W, Jackson, P R, Anderies, B J, Bendok, B R, Zimmerman, R S, Quarles, C, Porter-Umphrey, A B, Mrugala, M M, Sharma, A, Hoxworth, J M, Sattur, M G, Sanai, N, Koulemberis, P E, Krishna, C, Mitchell, J R, Wu, T, Tran, N L, Swanson, K R, Li, J

“…MR imaging-based modeling of tumor cell density can substantially improve targeted treatment of glioblastoma. Unfortunately, interpatient variability limits…”
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Impact of Software Modeling on the Accuracy of Perfusion MRI in Glioma by Hu, L S, Kelm, Z, Korfiatis, P, Dueck, A C, Elrod, C, Ellingson, B M, Kaufmann, T J, Eschbacher, J M, Karis, J P, Smith, K, Nakaji, P, Brinkman, D, Pafundi, D, Baxter, L C, Erickson, B J

“…Relative cerebral blood volume, as measured by T2*-weighted dynamic susceptibility-weighted contrast-enhanced MRI, represents the most robust and widely used…”
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Spiral T1 Spin-Echo for Routine Postcontrast Brain MRI Exams: A Multicenter Multireader Clinical Evaluation by Ooi, M B, Li, Z, Robison, R K, Wang, D, Anderson, 3rd, A G, Zwart, N R, Bakhru, A, Nagaraj, S, Mathews, T, Hey, S, Koonen, J J, Dimitrov, I E, Friel, H T, Lu, Q, Obara, M, Saha, I, Wang, H, Wang, Y, Zhao, Y, Temkit, M, Hu, H H, Chenevert, T L, Togao, O, Tkach, J A, Nagaraj, U D, Pinho, M C, Gupta, R K, Small, J E, Kunst, M M, Karis, J P, Andre, J B, Miller, J H, Pinter, N K, Pipe, J G

“…Spiral MR imaging has several advantages compared with Cartesian MR imaging that can be leveraged for added clinical value. A multicenter multireader study was…”
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Bilateral Temporal Hypometabolism in Epilepsy by Blum, David E., Ehsan, Tajammul, Dungan, David, Karis, John P., Fisher, Robert S.

“…Purpose: Positron emission tomography (PET) has proven useful in epilepsy surgery for its ability to identify unilateral temporal hypometabolism (UTH), which…”
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Reply by Buller, M, Karis, J P

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Fast spin echo MR imaging by Partovi, S, Fram, E K, Karis, J P

“…For years, investigators have sought after faster MR scanning techniques. Gradient echo and echo planar imaging were potential candidates that met with limited…”
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Sonographic diagnosis of premature cervical dilatation. Potential pitfall due to lower uterine segment contractions by Karis, J P, Hertzberg, B S, Bowie, J D

“…Antenatal sonography is an accepted method of evaluating the cervix and lower uterine segment. Dilatation of the endocervical canal can be missed due to…”
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An alternative to GRASE: toward spin-echo-like contrast with independent reconstruction of gradient-echo images by Keller, P J, Karis, J P, Fram, E K, Heiserman, J E, Drayer, B P

“…Multiple gradient echoes are generated for each RF echo of a Carr-Purcell-Meiboom-Gill (CPMG) train. Independently, phase-encoded fast spin-echo images are…”
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