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Krishna Shrinivas Nayak, PhD

Professor

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Phone +1 213 740 3494
Email [email protected]
CTSI Profile

Awards

  • 2010
     -: Sabbatical at NIH/NHLBI Laboratory for Cardiac Energetics, 2010
     – 2011
  • GE Healthcare Magnetic Resonance Thought Leader Award, 2009
  • USC-Mellon Mentoring Award, Faculty Mentoring of Graduate Students, 2008
  • USC Viterbi School of Engineering, Junior Faculty Research Award, 2007

Research Funding

  • Improved Fetal Screening using 0.55T MRI
    NIH · R01HD115284 · Jun 1, 2025 – Feb 28, 2030 · Role: Co-Principal Investigator
  • Volumetric Real-Time MRI at 0.55 Tesla
    NIH · U01HL167613 · Jan 1, 2023 – Dec 31, 2026 · Role: Principal Investigator
  • Improved Myocardial Perfusion Assessment using High-Performance Low-Field MRI
    NIH · R21HL159533 · Jun 1, 2022 – May 31, 2025 · Role: Principal Investigator
  • Improved Diagnostic MRI around Metallic Implants
    NIH · R01AR078912 · Feb 1, 2022 – Dec 31, 2027 · Role: Principal Investigator
  • Area B: Precise DCE-MRI Assessment of Brain Tumors
    NIH · R33CA225400 · Sep 30, 2017 – Aug 31, 2021 · Role: Principal Investigator
  • Novel Myocardial Perfusion Stress Test using Arterial Spin Labeling
    NIH · R01HL130494 · Jul 1, 2016 – Jun 30, 2021 · Role: Principal Investigator
  • Rapid MRI Measures of Absolute Fat Mass in Adipose Tissue and Organs
    NIH · R21DK081173 · Feb 1, 2009 – Dec 31, 2012 · Role: Principal Investigator
  • Superior Cardiac MRI using Wideband SSFP at 3 Tesla
    NIH · R21HL079987 · Feb 15, 2006 – Nov 30, 2008 · Role: Principal Investigator

Media

Publications

  • An evaluation of brain volume and cortical thickness measurement at 0.55 T. MAGMA. 2026 Jun 29.. View in PubMed
  • Imaging Near Spinal Fixation Hardware at 0.55 T Compared With 3 T. J Magn Reson Imaging. 2026 Jun 20.. View in PubMed
  • Optimization of fetal brain MRI at 0.55 T with slice-to-volume reconstruction. MAGMA. 2026 May 26.. View in PubMed
  • Assessment of myocardial performance using three-dimensional echocardiography in cancer patients exposed to anthracycline-based chemotherapy and/or targeted therapy – a scoping review. BMC Cardiovasc Disord. 2026 May 16; 26(1).. View in PubMed
  • Improved dynamic MRI of the wrist and heart at 0.55 T enabled by rapid 3D printed flexible coils. Nat Commun. 2026 Apr 20; 17(1).. View in PubMed
  • Green Dialysis: A Framework for Environmentally Sustainable Renal Replacement Therapy. Semin Dial. 2026 May-Jun; 39(3):76-87.. View in PubMed
  • Dynamic Mode Decomposition (DMD) for Low-Latency Real-Time Cardiac MRI. Magn Reson Med. 2026 Aug; 96(2):623-634.. View in PubMed
  • Isotropic three-dimensional cardiac cine imaging at 0.55T using stack-of-spiral sampling and four-dimensional iterative motion compensation. J Cardiovasc Magn Reson. 2026 Summer; 28(1):102698.. View in PubMed
  • Distortion correction in TSE near titanium implants at 0.55 T using reversed frequency-encoding and model-based reconstruction. MAGMA. 2025 Dec 22.. View in PubMed
  • 4D echocardiographic detection of early right atrial and ventricular dysfunction following dual-chamber pacing. BMC Cardiovasc Disord. 2025 12 05; 26(1):18.. View in PubMed
  • Open-Source Simulator of Imaging Near Metal at Arbitrary Magnetic Field Strengths. Magn Reson Med. 2026 Apr; 95(4):2370-2383.. View in PubMed
  • Online Spatiotemporally Constrained Reconstruction for Real-Time Interactive MRI. Magn Reson Med. 2026 Mar; 95(3):1644-1652.. View in PubMed
  • Cartesian MaxGIRF: Model-based EPI reconstruction incorporating gradient nonlinearity and concomitant field effects. Magn Reson Med. 2026 Feb; 95(2):1044-1067.. View in PubMed
  • Acceleration of slice encoding for metal artifact correction at 0.55 T using hexagonal sampling. Magn Reson Med. 2026 Feb; 95(2):1098-1109.. View in PubMed
  • Free-breathing 3D pulmonary ventilation mapping at 0.55 T using stack-of-spiral out-in bSSFP. Magn Reson Med. 2026 01; 95(1):430-441.. View in PubMed
  • Feasibility of tagged MRI at 0.55 T. Magn Reson Med. 2026 01; 95(1):465-473.. View in PubMed
  • In-vivo liver proton density fat fraction quantification at 0.55 T: a pilot study with comparison against 3 T MRI. MAGMA. 2025 Dec; 38(6):949-957.. View in PubMed
  • Towards accurate MRF T2 in structured material at 0.55T using MT-suppressed excitations. Magn Reson Imaging. 2025 Oct; 122:110444.. View in PubMed
  • Prediction of cardiac autonomic dysfunction using heart rate response to deep breathing test among type 2 diabetes mellitus. BMC Endocr Disord. 2025 Apr 25; 25(1):117.. View in PubMed
  • Contactless cardiac gating at 0.55T using high-amplitude pilot tone with interference cancellation (HAPTIC). Magn Reson Med. 2025 Sep; 94(3):1182-1190.. View in PubMed
  • Three Dimensional Real-Time MRI for the Comprehensive Evaluation of Wrist Kinematics. J Magn Reson Imaging. 2025 Jun; 61(6):2648-2651.. View in PubMed
  • Imaging near titanium total hip arthroplasty at 0.55 T compared with 3 T. Magn Reson Med. 2025 07; 94(1):242-250.. View in PubMed
  • Assessing angiographic results of saline autotransfusion and thrombus aspiration in STEMI patients. Future Cardiol. 2025 03; 21(4):237-243.. View in PubMed
  • A bibliometric analysis of research trends on left ventricular dysfunction and exercise among individuals with type 2 diabetes mellitus. J Bodyw Mov Ther. 2025 06; 42:894-901.. View in PubMed
  • Efficient 3D FISP-MRF at 0.55 T using long spiral readouts and concomitant field effect mitigation. Magn Reson Imaging. 2025 May; 118:110357.. View in PubMed
  • Multiresolution comparison of fetal real-time and cine magnetic resonance imaging at 0.55T. J Cardiovasc Magn Reson. 2025; 27(1):101856.. View in PubMed
  • Effect of exercise training on cardiac autonomic function in type 2 diabetes mellitus: a systematic review and meta-analysis. Syst Rev. 2025 02 04; 14(1):34.. View in PubMed
  • Feasibility of fetal cardiac function and anatomy assessment by real-time spiral balanced steady-state free precession magnetic resonance imaging at 0.55T. J Cardiovasc Magn Reson. 2025; 27(1):101130.. View in PubMed
  • Single breath-hold volumetric lung imaging at 0.55T using stack-of-spiral (SoS) out-in balanced SSFP. Magn Reson Med. 2025 May; 93(5):1999-2007.. View in PubMed
  • Paramagnetic salt and agarose recipes for phantoms with desired T1 and T2 values for low-field MRI. NMR Biomed. 2025 01; 38(1):e5281.. View in PubMed
  • Simultaneous multi-slice cardiac real-time MRI at 0.55T. Magn Reson Med. 2025 Apr; 93(4):1723-1732.. View in PubMed
  • Code review facility in Magnetic Resonance in Medicine. Magn Reson Med. 2025 Feb; 93(2):452-454.. View in PubMed
  • Improved liver fat and R2* quantification at 0.55 T using locally low-rank denoising. Magn Reson Med. 2025 03; 93(3):1348-1364.. View in PubMed
  • Multidimensional RF pulse design with consideration of concomitant field effects. Magn Reson Med. 2025 02; 93(2):718-729.. View in PubMed
  • T1 and T2 measurements across multiple 0.55T MRI systems using open-source vendor-neutral sequences. Magn Reson Med. 2025 01; 93(1):289-300.. View in PubMed
  • Comprehensive assessment of nonuniform image quality: Application to imaging near metal. Magn Reson Med. 2024 12; 92(6):2358-2372.. View in PubMed
  • Improved abdominal T1 weighted imaging at 0.55T. Magn Reson Med. 2024 12; 92(6):2580-2587.. View in PubMed
  • Diffusion tensor brain imaging at 0.55T: A feasibility study. Magn Reson Med. 2024 10; 92(4):1649-1657.. View in PubMed
  • Erratum to: Velocity-selective arterial spin labeling perfusion MRI: A review of the state of the art and recommendations for clinical implementation (Magn Reson Med. 2022; 88:1528-1547). Magn Reson Med. 2024 Aug; 92(2):881.. View in PubMed
  • Fasting-mimicking diet causes hepatic and blood markers changes indicating reduced biological age and disease risk. Nat Commun. 2024 02 20; 15(1):1309.. View in PubMed
  • Replication of the bSTAR sequence and open-source implementation. Magn Reson Med. 2024 04; 91(4):1464-1477.. View in PubMed
  • New clinical opportunities of low-field MRI: heart, lung, body, and musculoskeletal. MAGMA. 2024 Feb; 37(1):1-14.. View in PubMed
  • Real-time MRI of the moving wrist at 0.55 tesla. Br J Radiol. 2023 Nov; 96(1151):20230298.. View in PubMed
  • Real-time water/fat imaging at 0.55T with spiral out-in-out-in sampling. Magn Reson Med. 2024 02; 91(2):649-659.. View in PubMed
  • Speech production real-time MRI at 0.55 T. Magn Reson Med. 2024 01; 91(1):337-343.. View in PubMed
  • Cardiac MRI at Low Field Strengths. J Magn Reson Imaging. 2024 02; 59(2):412-430.. View in PubMed
  • Effects of Dietary Sugar Reduction on Biomarkers of Cardiometabolic Health in Latino Youth: Secondary Analyses from a Randomized Controlled Trial. Nutrients. 2023 Jul 27; 15(15).. View in PubMed
  • Low-field MRI: A report on the 2022 ISMRM workshop. Magn Reson Med. 2023 10; 90(4):1682-1694.. View in PubMed
  • Submillimeter lung MRI at 0.55 T using balanced steady-state free precession with half-radial dual-echo readout (bSTAR). Magn Reson Med. 2023 11; 90(5):1949-1957.. View in PubMed
  • Body composition profiling at 0.55T: Feasibility and precision. Magn Reson Med. 2023 09; 90(3):1114-1120.. View in PubMed
  • Low-field 0.55 T MRI evaluation of the fetus. Pediatr Radiol. 2023 06; 53(7):1469-1475.. View in PubMed
  • Update on state-of-the-art for arterial spin labeling (ASL) human perfusion imaging outside of the brain. Magn Reson Med. 2023 05; 89(5):1754-1776.. View in PubMed
  • Erratum to: Velocity-selective arterial spin labeling perfusion MRI: A review of the state of the art and recommendations for clinical implementation (Magn Reson Med. 2022; 88:1528-1547). Magn Reson Med. 2023 Mar; 89(3):1278-1279.. View in PubMed
  • Lung parenchyma transverse relaxation rates at 0.55 T. Magn Reson Med. 2023 04; 89(4):1522-1530.. View in PubMed
  • Contrast-optimal simultaneous multi-slice bSSFP cine cardiac imaging at 0.55 T. Magn Reson Med. 2023 02; 89(2):746-755.. View in PubMed
  • Evaluation of a novel 8-channel RX coil for speech production MRI at 0.55 T. MAGMA. 2023 Jul; 36(3):419-426.. View in PubMed
  • Velocity-selective arterial spin labeling perfusion MRI: A review of the state of the art and recommendations for clinical implementation. Magn Reson Med. 2022 10; 88(4):1528-1547.. View in PubMed
  • Clinical Intervention to Reduce Dietary Sugar Does Not Affect Liver Fat in Latino Youth, Regardless of PNPLA3 Genotype: A Randomized Controlled Trial. J Nutr. 2022 07 06; 152(7):1655-1665.. View in PubMed
  • MaxGIRF: Image reconstruction incorporating concomitant field and gradient impulse response function effects. Magn Reson Med. 2022 08; 88(2):691-710.. View in PubMed
  • Novel Hypertrophic Cardiomyopathy Diagnosis Index Using Deep Features and Local Directional Pattern Techniques. J Imaging. 2022 Apr 06; 8(4).. View in PubMed
  • Effects of B1+ Heterogeneity on Spin Echo-Based Liver Iron Estimates. J Magn Reson Imaging. 2022 05; 55(5):1419-1425.. View in PubMed
  • A multispeaker dataset of raw and reconstructed speech production real-time MRI video and 3D volumetric images. Sci Data. 2021 07 20; 8(1):187.. View in PubMed
  • Optimizing constrained reconstruction in magnetic resonance imaging for signal detection. Phys Med Biol. 2021 07 16; 66(14).. View in PubMed
  • Pseudo Test-Retest Evaluation of Millimeter-Resolution Whole-Brain Dynamic Contrast-enhanced MRI in Patients with High-Grade Glioma. Radiology. 2021 08; 300(2):410-420.. View in PubMed
  • Liver Fat Reduction After Gastric Banding and Associations with Changes in Insulin Sensitivity and β-Cell Function. Obesity (Silver Spring). 2021 07; 29(7):1155-1163.. View in PubMed
  • Sparse precontrast T1 mapping for high-resolution whole-brain DCE-MRI. Magn Reson Med. 2021 10; 86(4):2234-2249.. View in PubMed
  • PNPLA3 Genotype, Arachidonic Acid Intake, and Unsaturated Fat Intake Influences Liver Fibrosis in Hispanic Youth with Obesity. Nutrients. 2021 May 12; 13(5).. View in PubMed
  • Is it Safe to Be Transplanted From Living Donors Who Recovered From COVID-19? Experience of 31 Kidney Transplants in a Multicenter Cohort Study From India. Transplantation. 2021 04 01; 105(4):842-850.. View in PubMed
  • Aliasing artifact reduction in spiral real-time MRI. Magn Reson Med. 2021 08; 86(2):916-925.. View in PubMed
  • Region-optimized virtual (ROVir) coils: Localization and/or suppression of spatial regions using sensor-domain beamforming. Magn Reson Med. 2021 07; 86(1):197-212.. View in PubMed
  • Improved 3D real-time MRI of speech production. Magn Reson Med. 2021 06; 85(6):3182-3195.. View in PubMed
  • Impact of Right Ventricular Function on Left Ventricular Torsion and Ventricular Deformations in Pulmonary Artery Hypertension Patients. Cardiovasc Hematol Disord Drug Targets. 2021; 21(1):78-86.. View in PubMed
  • Robust autocalibrated structured low-rank EPI ghost correction. Magn Reson Med. 2021 06; 85(6):3403-3419.. View in PubMed
  • Improved Glioma Grading Using Deep Convolutional Neural Networks. AJNR Am J Neuroradiol. 2021 01; 42(2):233-239.. View in PubMed
  • Real-Time Magnetic Resonance Imaging. J Magn Reson Imaging. 2022 01; 55(1):81-99.. View in PubMed
  • Fetal echocardiography at term in diabetic pregnancies helps predict the adverse neonatal outcome – Results of a prospective observational study from South India. Indian Heart J. 2020 Nov-Dec; 72(6):576-581.. View in PubMed
  • Deblurring for spiral real-time MRI using convolutional neural networks. Magn Reson Med. 2020 12; 84(6):3438-3452.. View in PubMed
  • Numerical approximation to the general kinetic model for ASL quantification. Magn Reson Med. 2020 11; 84(5):2846-2857.. View in PubMed
  • Perceived Dark Rim Artifact in First-Pass Myocardial Perfusion Magnetic Resonance Imaging Due to Visual Illusion. Korean J Radiol. 2020 04; 21(4):462-470.. View in PubMed
  • Improved velocity-selective labeling pulses for myocardial ASL. Magn Reson Med. 2020 10; 84(4):1909-1918.. View in PubMed
  • Single-shot EPI for ASL-CMR. Magn Reson Med. 2020 08; 84(2):738-750.. View in PubMed
  • Improved real-time tagged MRI using REALTAG. Magn Reson Med. 2020 08; 84(2):838-846.. View in PubMed
  • Feasibility of coronary endothelial function assessment using arterial spin labeled CMR. NMR Biomed. 2020 02; 33(2):e4183.. View in PubMed
  • Efficient DCE-MRI Parameter and Uncertainty Estimation Using a Neural Network. IEEE Trans Med Imaging. 2020 05; 39(5):1712-1723.. View in PubMed
  • Tracer kinetic models as temporal constraints during brain tumor DCE-MRI reconstruction. Med Phys. 2020 Jan; 47(1):37-51.. View in PubMed
  • Accuracy, uncertainty, and adaptability of automatic myocardial ASL segmentation using deep CNN. Magn Reson Med. 2020 05; 83(5):1863-1874.. View in PubMed
  • Magnetization Transfer Imaging Is Unaffected by Decreases in Renal Perfusion in Swine. Invest Radiol. 2019 11; 54(11):681-688.. View in PubMed
  • Impact of (k,t) sampling on DCE MRI tracer kinetic parameter estimation in digital reference objects. Magn Reson Med. 2020 05; 83(5):1625-1639.. View in PubMed
  • Real-time three-dimensional MRI for the assessment of dynamic carpal instability. PLoS One. 2019; 14(9):e0222704.. View in PubMed
  • Analysis of physiological noise in quantitative cardiac magnetic resonance. PLoS One. 2019; 14(8):e0214566.. View in PubMed
  • Iterative correction of RF envelope distortion with GRATER-measured waveforms. Magn Reson Med. 2020 01; 83(1):188-194.. View in PubMed
  • In vivo validation of T2- and susceptibility-based Sv O2 measurements with jugular vein catheterization under hypoxia and hypercapnia. Magn Reson Med. 2019 12; 82(6):2188-2198.. View in PubMed
  • Response to Letter to the Editor: “Nomenclature for real-time magnetic resonance imaging”. Magn Reson Med. 2019 08; 82(2):525-526.. View in PubMed
  • Radiofrequency transmit calibration: A multi-center evaluation of vendor-provided radiofrequency transmit mapping methods. Med Phys. 2019 Jun; 46(6):2629-2637.. View in PubMed
  • Intermittently tagged real-time MRI reveals internal tongue motion during speech production. Magn Reson Med. 2019 08; 82(2):600-613.. View in PubMed
  • Upper Airway Narrowing during Central Apnea in Obese Adolescents. Ann Am Thorac Soc. 2018 12; 15(12):1465-1471.. View in PubMed
  • 3D dynamic MRI of the vocal tract during natural speech. Magn Reson Med. 2019 03; 81(3):1511-1520.. View in PubMed
  • Impact of Gastric Banding Versus Metformin on β-Cell Function in Adults With Impaired Glucose Tolerance or Mild Type 2 Diabetes. Diabetes Care. 2018 12; 41(12):2544-2551.. View in PubMed
  • Dynamic off-resonance correction for spiral real-time MRI of speech. Magn Reson Med. 2019 01; 81(1):234-246.. View in PubMed
  • Non-contrast assessment of microvascular integrity using arterial spin labeled cardiovascular magnetic resonance in a porcine model of acute myocardial infarction. J Cardiovasc Magn Reson. 2018 07 02; 20(1):45.. View in PubMed

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