1: Nelson F, Poonawalla A, Hou P, Wolinsky J, Narayana P.
 3D MPRAGE improves classification of cortical lesions in multiple sclerosis.
Mult Scler. 2008 Nov;14(9):1214-9.
PMID: 18952832 [PubMed - in process]

2: Trivedi R, Gupta RK, Shah V, Tripathi M, Rathore RK, Kumar M, Pandey CM,
Narayana PA.
 Treatment-induced plasticity in cerebral palsy: a diffusion tensor imaging study.
Pediatr Neurol. 2008 Nov;39(5):341-9.
PMID: 18940558 [PubMed - in process]

3: He R, Sajja BR, Datta S, Narayana PA.
 Volume and shape in feature space on adaptive FCM in MRI segmentation.
Ann Biomed Eng. 2008 Sep;36(9):1580-93. Epub 2008 Jun 24.
PMID: 18574693 [PubMed - indexed for MEDLINE]

4: Guleria S, Gupta RK, Saksena S, Chandra A, Srivastava RN, Husain M, Rathore R,
Narayana PA.
 Retrograde Wallerian degeneration of cranial corticospinal tracts in cervical
spinal cord injury patients using diffusion tensor imaging.
J Neurosci Res. 2008 Aug 1;86(10):2271-80.
PMID: 18335542 [PubMed - indexed for MEDLINE]

5: Gill MB, Bockhorst K, Narayana P, Perez-Polo JR.
 Bax shuttling after neonatal hypoxia-ischemia: Hyperoxia effects.
J Neurosci Res. 2008 Jul 24;86(16):3584-3604. [Epub ahead of print]
PMID: 18655197 [PubMed - as supplied by publisher]

6: Hasan KM, Ewing-Cobbs L, Kramer LA, Fletcher JM, Narayana PA.
 Diffusion tensor quantification of the macrostructure and microstructure of human
midsagittal corpus callosum across the lifespan.
NMR Biomed. 2008 Jul 10. [Epub ahead of print]
PMID: 18615857 [PubMed - as supplied by publisher]

7: He R, Datta S, Sajja BR, Narayana PA.
 Generalized fuzzy clustering for segmentation of multi-spectral magnetic
resonance images.
Comput Med Imaging Graph. 2008 Jul;32(5):353-66. Epub 2008 Apr 2.
PMID: 18387784 [PubMed - in process]

8: Ramu J, Herrera J, Grill R, Bockhorst T, Narayana P.
 Brain fiber tract plasticity in experimental spinal cord injury: diffusion tensor
imaging.
Exp Neurol. 2008 Jul;212(1):100-7. Epub 2008 Apr 3.
PMID: 18482724 [PubMed - indexed for MEDLINE]

9: Kumar M, Gupta RK, Nath K, Rathore RK, Bayu G, Trivedi R, Husain M, Prasad KN,
Tripathi RP, Narayana PA.
 Can we differentiate true white matter fibers from pseudofibers inside a brain
abscess cavity using geometrical diffusion tensor imaging metrics?
NMR Biomed. 2008 Jul;21(6):581-8.
PMID: 18050359 [PubMed - indexed for MEDLINE]

10: Bockhorst KH, Narayana PA, Liu R, Ahobila-Vijjula P, Ramu J, Kamel M, Wosik
J, Bockhorst T, Hahn K, Hasan KM, Perez-Polo JR.
 Early postnatal development of rat brain: in vivo diffusion tensor imaging.
J Neurosci Res. 2008 May 15;86(7):1520-8.
PMID: 18189320 [PubMed - indexed for MEDLINE]

11: Haris M, Kumar S, Raj MK, Das KJ, Sapru S, Behari S, Rathore RK, Narayana PA,
Gupta RK.
 Serial diffusion tensor imaging to characterize radiation-induced changes in
normal-appearing white matter following radiotherapy in patients with adult
low-grade gliomas.
Radiat Med. 2008 Apr;26(3):140-50.
PMID: 18683569 [PubMed - indexed for MEDLINE]

12: Poonawalla AH, Hasan KM, Gupta RK, Ahn CW, Nelson F, Wolinsky JS, Narayana
PA.
 Diffusion-tensor MR imaging of cortical lesions in multiple sclerosis: initial
findings.
Radiology. 2008 Mar;246(3):880-6. Epub 2008 Jan 14.
PMID: 18195384 [PubMed - indexed for MEDLINE]

13: Gupta RK, Nath K, Prasad A, Prasad KN, Husain M, Rathore RK, Husain N,
Srivastava C, Khetan P, Trivedi R, Narayana PA.
 In vivo demonstration of neuroinflammatory molecule expression in brain abscess
with diffusion tensor imaging.
AJNR Am J Neuroradiol. 2008 Feb;29(2):326-32. Epub 2007 Nov 7.
PMID: 17989372 [PubMed - indexed for MEDLINE]

14: Herrera JJ, Chacko T, Narayana PA.
 Histological correlation of diffusion tensor imaging metrics in experimental
spinal cord injury.
J Neurosci Res. 2008 Feb 1;86(2):443-7.
PMID: 17868152 [PubMed - indexed for MEDLINE]

15: Hasan KM, Halphen C, Boska MD, Narayana PA.
 Diffusion tensor metrics, T2 relaxation, and volumetry of the naturally aging
human caudate nuclei in healthy young and middle-aged adults: possible
implications for the neurobiology of human brain aging and disease.
Magn Reson Med. 2008 Jan;59(1):7-13.
PMID: 18050345 [PubMed - indexed for MEDLINE]

16: Sajja BR, Narayana PA, Wolinsky JS, Ahn CW; PROMiSe Trial MRSI Group.
 Longitudinal magnetic resonance spectroscopic imaging of primary progressive
multiple sclerosis patients treated with glatiramer acetate: multicenter study.
Mult Scler. 2008 Jan;14(1):73-80. Epub 2007 Sep 19.
PMID: 17881390 [PubMed - indexed for MEDLINE]

17: Poonawalla AH, Hou P, Nelson FA, Wolinsky JS, Narayana PA.
 Cervical Spinal Cord Lesions in Multiple Sclerosis: T1-weighted
Inversion-Recovery MR Imaging with Phase-Sensitive Reconstruction.
Radiology. 2008 Jan;246(1):258-264.
PMID: 17991786 [PubMed - as supplied by publisher]

18: Nelson F, Poonawalla AH, Hou P, Huang F, Wolinsky JS, Narayana PA.
 Improved identification of intracortical lesions in multiple sclerosis with
phase-sensitive inversion recovery in combination with fast double inversion
recovery MR imaging.
AJNR Am J Neuroradiol. 2007 Oct;28(9):1645-9. Epub 2007 Sep 20.
PMID: 17885241 [PubMed - indexed for MEDLINE]

19: Trivedi R, Malik GK, Gupta RK, Gupta A, Nath K, Prasad KN, Purwar A, Rathore 
D, Rathore RK, Narayana PA.
 Increased anisotropy in neonatal meningitis: an indicator of meningeal
inflammation.
Neuroradiology. 2007 Sep;49(9):767-75. Epub 2007 Jun 2.
PMID: 17546449 [PubMed - indexed for MEDLINE]

20: Datta S, Sajja BR, He R, Gupta RK, Wolinsky JS, Narayana PA.
 Segmentation of gadolinium-enhanced lesions on MRI in multiple sclerosis.
J Magn Reson Imaging. 2007 May;25(5):932-7.
PMID: 17457804 [PubMed - indexed for MEDLINE]

21: Moeller FG, Hasan KM, Steinberg JL, Kramer LA, Valdes I, Lai LY, Swann AC,
Narayana PA.
 Diffusion tensor imaging eigenvalues: preliminary evidence for altered myelin in 
cocaine dependence.
Psychiatry Res. 2007 Apr 15;154(3):253-8. Epub 2007 Feb 26.
PMID: 17321725 [PubMed - indexed for MEDLINE]

22: Ramu J, Bockhorst KH, Grill RJ, Mogatadakala KV, Narayana PA.
 Cortical reorganization in NT3-treated experimental spinal cord injury:
Functional magnetic resonance imaging.
Exp Neurol. 2007 Mar;204(1):58-65. Epub 2006 Nov 16.
PMID: 17112518 [PubMed - indexed for MEDLINE]

23: Deng X, Ramu J, Narayana PA.
 Spinal cord atrophy in injured rodents: high-resolution MRI.
Magn Reson Med. 2007 Mar;57(3):620-4.
PMID: 17326166 [PubMed - indexed for MEDLINE]

24: Ghaghada KB, Bockhorst KH, Mukundan S Jr, Annapragada AV, Narayana PA.
 High-resolution vascular imaging of the rat spine using liposomal blood pool MR
agent.
AJNR Am J Neuroradiol. 2007 Jan;28(1):48-53.
PMID: 17213423 [PubMed - indexed for MEDLINE]

25: Moeller FG, Steinberg JL, Lane SD, Buzby M, Swann AC, Hasan KM, Kramer LA,
Narayana PA.
 Diffusion tensor imaging in MDMA users and controls: association with decision
making.
Am J Drug Alcohol Abuse. 2007;33(6):777-89.
PMID: 17994474 [PubMed - indexed for MEDLINE]

26: Wolinsky JS, Narayana PA, O'Connor P, Coyle PK, Ford C, Johnson K, Miller A, 
Pardo L, Kadosh S, Ladkani D; PROMiSe Trial Study Group.
 Glatiramer acetate in primary progressive multiple sclerosis: results of a
multinational, multicenter, double-blind, placebo-controlled trial.
Ann Neurol. 2007 Jan;61(1):14-24.
PMID: 17262850 [PubMed - indexed for MEDLINE]

27: Haris M, Gupta RK, Husain N, Hasan KM, Husain M, Narayana PA.
 Measurement of DTI metrics in hemorrhagic brain lesions: possible implication in 
MRI interpretation.
J Magn Reson Imaging. 2006 Dec;24(6):1259-68.
PMID: 17096394 [PubMed - indexed for MEDLINE]

28: Malik GK, Trivedi R, Gupta RK, Hasan KM, Hasan M, Gupta A, Pandey CM,
Narayana PA.
 Serial quantitative diffusion tensor MRI of the term neonates with
hypoxic-ischemic encephalopathy (HIE).
Neuropediatrics. 2006 Dec;37(6):337-43.
PMID: 17357035 [PubMed - indexed for MEDLINE]

29: Bhat H, Sajja BR, Narayana PA.
 Fast quantification of proton magnetic resonance spectroscopic imaging with
artificial neural networks.
J Magn Reson. 2006 Nov;183(1):110-22. Epub 2006 Sep 1.
PMID: 16949319 [PubMed - indexed for MEDLINE]

30: Ramu J, Bockhorst KH, Mogatadakala KV, Narayana PA.
 Functional magnetic resonance imaging in rodents: Methodology and application to 
spinal cord injury.
J Neurosci Res. 2006 Nov 1;84(6):1235-44.
PMID: 16941500 [PubMed - indexed for MEDLINE]

31: Valdes IH, Steinberg JL, Narayana PA, Kramer LA, Dougherty DM, Swann AC,
Barratt ES, Moeller FG.
 Impulsivity and BOLD fMRI activation in MDMA users and healthy control subjects.
Psychiatry Res. 2006 Oct 30;147(2-3):239-42. Epub 2006 Aug 4.
PMID: 16890410 [PubMed - indexed for MEDLINE]

32: Trivedi R, Gupta RK, Agarawal A, Hasan KM, Gupta A, Prasad KN, Bayu G,
Rathore D, Rathore RK, Narayana PA.
 Assessment of white matter damage in subacute sclerosing panencephalitis using
quantitative diffusion tensor MR imaging.
AJNR Am J Neuroradiol. 2006 Sep;27(8):1712-6.
PMID: 16971620 [PubMed - indexed for MEDLINE]

33: Gupta RK, Saksena S, Hasan KM, Agarwal A, Haris M, Pandey CM, Narayana PA.
 Focal Wallerian degeneration of the corpus callosum in large middle cerebral
artery stroke: serial diffusion tensor imaging.
J Magn Reson Imaging. 2006 Sep;24(3):549-55.
PMID: 16888796 [PubMed - indexed for MEDLINE]

34: Hasan KM, Narayana PA.
 Retrospective measurement of the diffusion tensor eigenvalues from diffusion
anisotropy and mean diffusivity in DTI.
Magn Reson Med. 2006 Jul;56(1):130-7.
PMID: 16755537 [PubMed - indexed for MEDLINE]

35: Trivedi R, Gupta RK, Hasan KM, Hou P, Prasad KN, Narayana PA.
 Diffusion tensor imaging in polymicrogyria: a report of three cases.
Neuroradiology. 2006 Jun;48(6):422-7. Epub 2006 Apr 11.
PMID: 16607542 [PubMed - indexed for MEDLINE]

36: Kale RA, Gupta RK, Saraswat VA, Hasan KM, Trivedi R, Mishra AM, Ranjan P,
Pandey CM, Narayana PA.
 Demonstration of interstitial cerebral edema with diffusion tensor MR imaging in 
type C hepatic encephalopathy.
Hepatology. 2006 Apr;43(4):698-706.
PMID: 16557540 [PubMed - indexed for MEDLINE]

37: Deo AA, Grill RJ, Hasan KM, Narayana PA.
 In vivo serial diffusion tensor imaging of experimental spinal cord injury.
J Neurosci Res. 2006 Apr;83(5):801-10.
PMID: 16456864 [PubMed - indexed for MEDLINE]

38: Datta S, Sajja BR, He R, Wolinsky JS, Gupta RK, Narayana PA.
 Segmentation and quantification of black holes in multiple sclerosis.
Neuroimage. 2006 Jan 15;29(2):467-74. Epub 2005 Aug 26.
PMID: 16126416 [PubMed - indexed for MEDLINE]

39: Sajja BR, Datta S, He R, Mehta M, Gupta RK, Wolinsky JS, Narayana PA.
 Unified approach for multiple sclerosis lesion segmentation on brain MRI.
Ann Biomed Eng. 2006 Jan;34(1):142-51. Epub 2006 Mar 9.
PMID: 16525763 [PubMed - indexed for MEDLINE]

40: He R, Sajja BR, Narayana PA.
 Implementation of high-dimensional feature map for segmentation of MR images.
Ann Biomed Eng. 2005 Oct;33(10):1439-48.
PMID: 16240091 [PubMed - indexed for MEDLINE]

41: Gupta RK, Saksena S, Agarwal A, Hasan KM, Husain M, Gupta V, Narayana PA.
 Diffusion tensor imaging in late posttraumatic epilepsy.
Epilepsia. 2005 Sep;46(9):1465-71.
PMID: 16146442 [PubMed - indexed for MEDLINE]

42: Sriram S, Yao SY, Stratton C, Moses H, Narayana PA, Wolinsky JS.
 Pilot study to examine the effect of antibiotic therapy on MRI outcomes in RRMS.
J Neurol Sci. 2005 Jul 15;234(1-2):87-91.
PMID: 15935383 [PubMed - indexed for MEDLINE]

43: Gupta RK, Hasan KM, Trivedi R, Pradhan M, Das V, Parikh NA, Narayana PA.
 Diffusion tensor imaging of the developing human cerebrum.
J Neurosci Res. 2005 Jul 15;81(2):172-8.
PMID: 15931676 [PubMed - indexed for MEDLINE]

44: Hou P, Hasan KM, Sitton CW, Wolinsky JS, Narayana PA.
 Phase-sensitive T1 inversion recovery imaging: a time-efficient interleaved
technique for improved tissue contrast in neuroimaging.
AJNR Am J Neuroradiol. 2005 Jun-Jul;26(6):1432-8.
PMID: 15956512 [PubMed - indexed for MEDLINE]

45: Hasan KM, Gupta RK, Santos RM, Wolinsky JS, Narayana PA.
 Diffusion tensor fractional anisotropy of the normal-appearing seven segments of 
the corpus callosum in healthy adults and relapsing-remitting multiple sclerosis 
patients.
J Magn Reson Imaging. 2005 Jun;21(6):735-43.
PMID: 15906348 [PubMed - indexed for MEDLINE]

46: Gupta RK, Hasan KM, Mishra AM, Jha D, Husain M, Prasad KN, Narayana PA.
 High fractional anisotropy in brain abscesses versus other cystic intracranial
lesions.
AJNR Am J Neuroradiol. 2005 May;26(5):1107-14.
PMID: 15891168 [PubMed - indexed for MEDLINE]

47: Moeller FG, Hasan KM, Steinberg JL, Kramer LA, Dougherty DM, Santos RM,
Valdes I, Swann AC, Barratt ES, Narayana PA.
 Reduced anterior corpus callosum white matter integrity is related to increased
impulsivity and reduced discriminability in cocaine-dependent subjects: diffusion
tensor imaging.
Neuropsychopharmacology. 2005 Mar;30(3):610-7.
PMID: 15637640 [PubMed - indexed for MEDLINE]

48: Narayana PA.
 Magnetic resonance spectroscopy in the monitoring of multiple sclerosis.
J Neuroimaging. 2005;15(4 Suppl):46S-57S. Review.
PMID: 16385018 [PubMed - indexed for MEDLINE]

49: Madi S, Hasan KM, Narayana PA.
 Diffusion tensor imaging of in vivo and excised rat spinal cord at 7 T with an
icosahedral encoding scheme.
Magn Reson Med. 2005 Jan;53(1):118-25.
PMID: 15690510 [PubMed - indexed for MEDLINE]

50: Narayana PA, Grill RJ, Chacko T, Vang R.
 Endogenous recovery of injured spinal cord: longitudinal in vivo magnetic
resonance imaging.
J Neurosci Res. 2004 Dec 1;78(5):749-59.
PMID: 15499591 [PubMed - indexed for MEDLINE]

51: Moeller FG, Steinberg JL, Dougherty DM, Narayana PA, Kramer LA, Renshaw PF.
 Functional MRI study of working memory in MDMA users.
Psychopharmacology (Berl). 2004 Dec;177(1-2):185-94. Epub 2004 Jun 18.
PMID: 15221201 [PubMed - indexed for MEDLINE]

52: Narayana PA, Wolinsky JS, Rao SB, He R, Mehta M; PROMiSe Trial MRSI Group.
 Multicentre proton magnetic resonance spectroscopy imaging of primary progressive
multiple sclerosis.
Mult Scler. 2004 Jun;10 Suppl 1:S73-8. Review.
PMID: 15218814 [PubMed - indexed for MEDLINE]

53: Hasan KM, Alexander AL, Narayana PA.
 Does fractional anisotropy have better noise immunity characteristics than
relative anisotropy in diffusion tensor MRI? An analytical approach.
Magn Reson Med. 2004 Feb;51(2):413-7.
PMID: 14755670 [PubMed - indexed for MEDLINE]

54: He R, Mehta M, Narayana P.
 Color coding for visualization of the directional information of DTI.
Conf Proc IEEE Eng Med Biol Soc. 2004;3:1857-9.
PMID: 17272072 [PubMed]

55: Sajja B, Datta S, He R, Narayana P.
 A unified approach for lesion segmentation on MRI of multiple sclerosis.
Conf Proc IEEE Eng Med Biol Soc. 2004;3:1778-81.
PMID: 17272052 [PubMed]

56: He R, Datta S, Rao Sajja B, Mehta M, Narayana P.
 Adaptive FCM with contextual constrains for segmentation of multi-spectral MRI.
Conf Proc IEEE Eng Med Biol Soc. 2004;3:1660-3.
PMID: 17272021 [PubMed]

57: Hasan KM, Narayana PA.
 Computation of the fractional anisotropy and mean diffusivity maps without tensor
decoding and diagonalization: Theoretical analysis and validation.
Magn Reson Med. 2003 Sep;50(3):589-98.
PMID: 12939767 [PubMed - indexed for MEDLINE]

58: Bilgen M, Narayana PA.
 Mohr diagram interpretation of anisotropic diffusion indices in MRI.
Magn Reson Imaging. 2003 Jun;21(5):567-72.
PMID: 12878268 [PubMed - indexed for MEDLINE]

59: He R, Narayana PA.
 Global optimization of mutual information: application to three-dimensional
retrospective registration of magnetic resonance images.
Comput Med Imaging Graph. 2002 Jul-Aug;26(4):277-92.
PMID: 12074923 [PubMed - indexed for MEDLINE]

60: He R, Narayana PA.
 Automatic delineation of Gd enhancements on magnetic resonance images in multiple
sclerosis.
Med Phys. 2002 Jul;29(7):1536-46.
PMID: 12148736 [PubMed - indexed for MEDLINE]

61: Wolinsky JS, Narayana PA.
 Magnetic resonance spectroscopy in multiple sclerosis: window into the diseased
brain.
Curr Opin Neurol. 2002 Jun;15(3):247-51. Review.
PMID: 12045720 [PubMed - indexed for MEDLINE]

62: Bilgen M, Dogan B, Narayana PA.
 In vivo assessment of blood-spinal cord barrier permeability: serial dynamic
contrast enhanced MRI of spinal cord injury.
Magn Reson Imaging. 2002 May;20(4):337-41.
PMID: 12165352 [PubMed - indexed for MEDLINE]

63: Felberg RA, Grotta JC, Shirzadi AL, Strong R, Narayana P, Hill-Felberg SJ,
Aronowski J.
 Cell death in experimental intracerebral hemorrhage: the "black hole" model of
hemorrhagic damage.
Ann Neurol. 2002 Apr;51(4):517-24.
PMID: 11921058 [PubMed - indexed for MEDLINE]

64: Elshafiey I, Bilgen M, He R, Narayana PA.
 In vivo diffusion tensor imaging of rat spinal cord at 7 T.
Magn Reson Imaging. 2002 Apr;20(3):243-7.
PMID: 12117606 [PubMed - indexed for MEDLINE]

65: Bilgen M, Elshafiey I, Narayana PA.
 Mohr diagram representation of anisotropic diffusion tensor in MRI.
Magn Reson Med. 2002 Apr;47(4):823-7.
PMID: 11948747 [PubMed - indexed for MEDLINE]

66: Bilgen M, Elshafiey I, Narayana PA.
 In vivo magnetic resonance microscopy of rat spinal cord at 7 T using implantable
RF coils.
Magn Reson Med. 2001 Dec;46(6):1250-3.
PMID: 11746595 [PubMed - indexed for MEDLINE]

67: Bilgen M, Narayana PA.
 A pharmacokinetic model for quantitative evaluation of spinal cord injury with
dynamic contrast-enhanced magnetic resonance imaging.
Magn Reson Med. 2001 Dec;46(6):1099-106.
PMID: 11746575 [PubMed - indexed for MEDLINE]

68: O'Connor P, Lee L, Ng PT, Narayana P, Wolinsky JS.
 Determinants of overall quality of life in secondary progressive MS: a
longitudinal study.
Neurology. 2001 Sep 11;57(5):889-91.
PMID: 11552023 [PubMed - indexed for MEDLINE]

69: Brod SA, Lindsey JW, Vriesendorp FS, Ahn C, Henninger E, Narayana PA,
Wolinsky JS.
 Ingested IFN-alpha: results of a pilot study in relapsing-remitting MS.
Neurology. 2001 Sep 11;57(5):845-52.
PMID: 11552015 [PubMed - indexed for MEDLINE]

70: Sharma R, Narayana PA, Wolinsky JS.
 Grey matter abnormalities in multiple sclerosis: proton magnetic resonance
spectroscopic imaging.
Mult Scler. 2001 Aug;7(4):221-6.
PMID: 11548980 [PubMed - indexed for MEDLINE]

71: Bilgen M, Abbe R, Narayana PA.
 Dynamic contrast-enhanced MRI of experimental spinal cord injury: in vivo serial 
studies.
Magn Reson Med. 2001 Apr;45(4):614-22.
PMID: 11283989 [PubMed - indexed for MEDLINE]

72: Wolinsky JS, Narayana PA, Johnson KP; Multiple Sclerosis Study Group and the 
MRI Analysis Center.
 United States open-label glatiramer acetate extension trial for relapsing
multiple sclerosis: MRI and clinical correlates. Multiple Sclerosis Study Group
and the MRI Analysis Center.
Mult Scler. 2001 Feb;7(1):33-41.
PMID: 11321192 [PubMed - indexed for MEDLINE]

73: Whitaker JN, Wolinsky JS, Narayana PA, Bartolucci AA, Noseworthy JH, Lublin
FD, Linde A, Gjörstrup P, Sullivan HC; North American Linomide Investigators.
 Relationship of urinary myelin basic protein-like material with cranial magnetic 
resonance imaging in advanced multiple sclerosis.
Arch Neurol. 2001 Jan;58(1):49-54.
PMID: 11176936 [PubMed - indexed for MEDLINE]

74: Wolinsky JS, Narayana PA, Noseworthy JH, Lublin FD, Whitaker JN, Linde A,
Gjörstrup P, Sullivan HC.
 Linomide in relapsing and secondary progressive MS: part II: MRI results. MRI
Analysis Center of the University of Texas-Houston, Health Science Center, and
the North American Linomide Investigators.
Neurology. 2000 May 9;54(9):1734-41.
PMID: 10802777 [PubMed - indexed for MEDLINE]

75: Bilgen M, Abbe R, Liu SJ, Narayana PA.
 Spatial and temporal evolution of hemorrhage in the hyperacute phase of
experimental spinal cord injury: in vivo magnetic resonance imaging.
Magn Reson Med. 2000 Apr;43(4):594-600.
PMID: 10748436 [PubMed - indexed for MEDLINE]

76: Bedell BJ, Narayana PA.
 Response to "Optimal partial volume estimation in MRI"
Magn Reson Med. 1999 Sep;42(3):614-615. No abstract available.
PMID: 10467310 [PubMed - as supplied by publisher]

77: Fenyes DA, Narayana PA.
 In vivo diffusion tensor imaging of rat spinal cord with echo planar imaging.
Magn Reson Med. 1999 Aug;42(2):300-6.
PMID: 10440955 [PubMed - indexed for MEDLINE]

78: Fenyes DA, Narayana PA.
 In vivo diffusion characteristics of rat spinal cord.
Magn Reson Imaging. 1999 Jun;17(5):717-22.
PMID: 10372525 [PubMed - indexed for MEDLINE]

79: Narayana P, Fenyes D, Zacharopoulos N.
 In vivo relaxation times of gray matter and white matter in spinal cord.
Magn Reson Imaging. 1999 May;17(4):623-6.
PMID: 10231189 [PubMed - indexed for MEDLINE]

80: Narayana P, Abbe R, Liu SJ, Johnston D.
 Does loss of gray- and white-matter contrast in injured spinal cord signify
secondary injury? In vivo longitudinal MRI studies.
Magn Reson Med. 1999 Feb;41(2):315-20.
PMID: 10080279 [PubMed - indexed for MEDLINE]

81: Fenyes DA, Narayana PA.
 In vivo echo-planar imaging of rat spinal cord.
Magn Reson Imaging. 1998 Dec;16(10):1249-55.
PMID: 9858282 [PubMed - indexed for MEDLINE]

82: Zacharopoulos NG, Narayana PA.
 Selective measurement of white matter and gray matter diffusion trace values in
normal human brain.
Med Phys. 1998 Nov;25(11):2237-41.
PMID: 9829252 [PubMed - indexed for MEDLINE]

83: Bedell BJ, Narayana PA.
 Volumetric analysis of white matter, gray matter, and CSF using fractional volume
analysis.
Magn Reson Med. 1998 Jun;39(6):961-9.
PMID: 9621920 [PubMed - indexed for MEDLINE]

84: Bedell BJ, Narayana PA.
 Automatic segmentation of gadolinium-enhanced multiple sclerosis lesions.
Magn Reson Med. 1998 Jun;39(6):935-40.
PMID: 9621917 [PubMed - indexed for MEDLINE]

85: Bedell BJ, Narayana PA.
 Implementation and evaluation of a new pulse sequence for rapid acquisition of
double inversion recovery images for simultaneous suppression of white matter and
CSF.
J Magn Reson Imaging. 1998 May-Jun;8(3):544-7.
PMID: 9626866 [PubMed - indexed for MEDLINE]

86: Filippi M, Horsfield MA, Hajnal JV, Narayana PA, Udupa JK, Yousry TA,
Zijdenbos A.
 Quantitative assessment of magnetic resonance imaging lesion load in multiple
sclerosis.
J Neurol Neurosurg Psychiatry. 1998 May;64 Suppl 1:S88-93. Review.
PMID: 9647293 [PubMed - indexed for MEDLINE]

87: Narayana PA, Doyle TJ, Lai D, Wolinsky JS.
 Serial proton magnetic resonance spectroscopic imaging, contrast-enhanced
magnetic resonance imaging, and quantitative lesion volumetry in multiple
sclerosis.
Ann Neurol. 1998 Jan;43(1):56-71.
PMID: 9450769 [PubMed - indexed for MEDLINE]

88: Falconer JC, Narayana PA.
 Cerebrospinal fluid-suppressed high-resolution diffusion imaging of human brain.
Magn Reson Med. 1997 Jan;37(1):119-23.
PMID: 8978640 [PubMed - indexed for MEDLINE]

89: Bedell BJ, Narayana PA, Wolinsky JS.
 A dual approach for minimizing false lesion classifications on magnetic resonance
images.
Magn Reson Med. 1997 Jan;37(1):94-102.
PMID: 8978637 [PubMed - indexed for MEDLINE]

90: Bedell BJ, Narayana PA.
 Automatic removal of extrameningeal tissues from MR images of human brain.
J Magn Reson Imaging. 1996 Nov-Dec;6(6):939-43.
PMID: 8956141 [PubMed - indexed for MEDLINE]

91: Bedell BJ, Narayana PA, Johnston DA.
 Three-dimensional MR image registration of the human brain.
Magn Reson Med. 1996 Mar;35(3):384-90.
PMID: 8699951 [PubMed - indexed for MEDLINE]

92: Falconer JC, Liu SJ, Abbe RA, Narayana PA.
 Time dependence of N-acetyl-aspartate, lactate, and pyruvate concentrations
following spinal cord injury.
J Neurochem. 1996 Feb;66(2):717-22. Erratum in: J Neurochem 1996 Jun;66(6):2632.
PMID: 8592144 [PubMed - indexed for MEDLINE]

93: Falconer JC, Narayana PA, Bhattacharjee M, Liu SJ.
 Characterization of an experimental spinal cord injury model using waveform and
morphometric analysis.
Spine. 1996 Jan 1;21(1):104-12.
PMID: 9122750 [PubMed - indexed for MEDLINE]

94: Doyle TJ, Bedell BJ, Narayana PA.
 Relative concentrations of proton MR visible neurochemicals in gray and white
matter in human brain.
Magn Reson Med. 1995 Jun;33(6):755-9.
PMID: 7651110 [PubMed - indexed for MEDLINE]

95: Narayana PA, Borthakur A.
 Effect of radio frequency inhomogeneity correction on the reproducibility of
intra-cranial volumes using MR image data.
Magn Reson Med. 1995 Mar;33(3):396-400.
PMID: 7760706 [PubMed - indexed for MEDLINE]

96: Doyle TJ, Pathak R, Wolinsky JS, Narayana PA.
 Automated proton spectroscopic image processing.
J Magn Reson B. 1995 Jan;106(1):58-63.
PMID: 7850174 [PubMed - indexed for MEDLINE]

97: Falconer JC, Narayana PA, Bhattacharjee MB, Liu SJ.
 Quantitative MRI of spinal cord injury in a rat model.
Magn Reson Med. 1994 Oct;32(4):484-91.
PMID: 7997114 [PubMed - indexed for MEDLINE]

98: Jackson EF, Narayana PA, Falconer JC.
 Reproducibility of nonparametric feature map segmentation for determination of
normal human intracranial volumes with MR imaging data.
J Magn Reson Imaging. 1994 Sep-Oct;4(5):692-700.
PMID: 7981514 [PubMed - indexed for MEDLINE]

99: Fitchard EF, Narayana PA.
 Two-dimensional registration of magnetic resonance brain images.
Med Phys. 1994 Aug;21(8):1333-7. Erratum in: Med Phys 1995 Mar;22(3):341.
PMID: 7799878 [PubMed - indexed for MEDLINE]

100: Jackson EF, Doyle TJ, Wolinsky JS, Narayana PA.
 Short TE hydrogen-1 spectroscopic MR imaging of normal human brain:
reproducibility studies.
J Magn Reson Imaging. 1994 Jul-Aug;4(4):545-51.
PMID: 7949679 [PubMed - indexed for MEDLINE]

101: Phillips JR, Falconer JC, Botzer S, Narayana PA.
 MRI scanner transport system.
Magn Reson Med. 1994 Jul;32(1):133-6.
PMID: 8084229 [PubMed - indexed for MEDLINE]

102: Slopis JM, Jackson EF, Narayana PA, Papasozomenos SC, Butler IJ.
 Proton magnetic resonance imaging and spectroscopic studies of the pathogenesis
and treatment of juvenile dermatomyositis.
J Child Neurol. 1993 Jul;8(3):242-9.
PMID: 8409266 [PubMed - indexed for MEDLINE]

103: Jackson EF, Narayana PA, Wolinsky JS, Doyle TJ.
 Accuracy and reproducibility in volumetric analysis of multiple sclerosis
lesions.
J Comput Assist Tomogr. 1993 Mar-Apr;17(2):200-5.
PMID: 8454745 [PubMed - indexed for MEDLINE]

104: Narayana PA, Wolinsky JS, Jackson EF, McCarthy M.
 Proton MR spectroscopy of gadolinium-enhanced multiple sclerosis plaques.
J Magn Reson Imaging. 1992 May-Jun;2(3):263-70.
PMID: 1627860 [PubMed - indexed for MEDLINE]

105: Hazle JD, Narayana PA, Dunsford HA.
 In vivo NMR, biochemical, and histologic evaluation of alcohol-induced fatty
liver in rat and a comparison with CCl4 hepatotoxicity.
Magn Reson Med. 1991 May;19(1):124-35.
PMID: 2046527 [PubMed - indexed for MEDLINE]

106: Wolinsky JS, Narayana PA.
 Proton magnetic resonance spectroscopy and multiple sclerosis.
Lancet. 1991 Feb 9;337(8737):362. No abstract available.
PMID: 1671253 [PubMed - indexed for MEDLINE]

107: Narayana PA, Slopis JM, Jackson EF, Jankovic J, Butler IJ.
 Proton magnetic resonance spectroscopic studies of hypertrophied muscle. Effect
of botulinum toxin treatment.
Invest Radiol. 1991 Jan;26(1):58-64.
PMID: 2022454 [PubMed - indexed for MEDLINE]

108: Narayana PA, Kudrle WA, Liu SJ, Charnov JH, Butler BD, Harris JH Jr.
 Magnetic resonance imaging of hyperbaric oxygen treated rats with spinal cord
injury: preliminary studies.
Magn Reson Imaging. 1991;9(3):423-8.
PMID: 1881262 [PubMed - indexed for MEDLINE]

109: Narayana PA, Johnston D, Flamig DP.
 In vivo proton magnetic resonance spectroscopy studies of human brain.
Magn Reson Imaging. 1991;9(3):303-8.
PMID: 1881247 [PubMed - indexed for MEDLINE]

110: Kudrle WA, Narayana PA, Dunsford HA.
 Magnetic resonance imaging of burn injury in rats.
Magn Reson Imaging. 1991;9(4):533-43.
PMID: 1779724 [PubMed - indexed for MEDLINE]

111: Fotedar LK, Slopis JM, Narayana PA, Fenstermacher MJ, Pivarnik J, Butler IJ.
 Proton magnetic resonance of exercise-induced water changes in gastrocnemius
muscle.
J Appl Physiol. 1990 Nov;69(5):1695-701.
PMID: 2177054 [PubMed - indexed for MEDLINE]

112: Wolinsky JS, Narayana PA, Fenstermacher MJ.
 Proton magnetic resonance spectroscopy in multiple sclerosis.
Neurology. 1990 Nov;40(11):1764-9.
PMID: 2172865 [PubMed - indexed for MEDLINE]

113: Fenstermacher MJ, Narayana PA.
 Serial proton magnetic resonance spectroscopy of ischemic brain injury in humans.
Invest Radiol. 1990 Sep;25(9):1034-9.
PMID: 2211046 [PubMed - indexed for MEDLINE]

114: Hazle JD, Narayana PA, Dunsford HA.
 Chronic carbon tetrachloride and phospholipase D hepatotoxicity in rat: in vivo
1H magnetic resonance, total lipid analysis, and histology.
Magn Reson Med. 1990 Aug;15(2):211-28.
PMID: 2392047 [PubMed - indexed for MEDLINE]

115: Weirich SD, Cotler HB, Narayana PA, Hazle JD, Jackson EF, Coupe KJ, McDonald
CL, Langford LA, Harris JH Jr.
 Histopathologic correlation of magnetic resonance imaging signal patterns in a
spinal cord injury model.
Spine. 1990 Jul;15(7):630-8.
PMID: 2218708 [PubMed - indexed for MEDLINE]

116: Jackson EF, Narayana PA, Flamig DP.
 One-dimensional spectroscopic imaging with stimulated echoes: phantom and human
leg studies.
Magn Reson Imaging. 1990;8(2):153-9.
PMID: 2338895 [PubMed - indexed for MEDLINE]

117: Narayana PA, Jackson EF, Hazle JD, Fotedar LK, Kulkarni MV, Flamig DP.
 In vivo localized proton spectroscopic studies of human gastrocnemius muscle.
Magn Reson Med. 1989 Nov;12(2):259-60. No abstract available.
PMID: 2559290 [PubMed - indexed for MEDLINE]

118: Gutierrez G, Pohil RJ, Narayana P.
 Skeletal muscle O2 consumption and energy metabolism during hypoxemia.
J Appl Physiol. 1989 May;66(5):2117-23.
PMID: 2745280 [PubMed - indexed for MEDLINE]

119: Misra LK, Narayana PA.
 In vivo T1 characterization of genetically induced muscle atrophy.
Magn Reson Imaging. 1989 May-Jun;7(3):277-82.
PMID: 2548050 [PubMed - indexed for MEDLINE]

120: Raval B, Mehta S, Narayana P, Kulkarni M.
 Feasibility of fast MR imaging of the liver at 1.5 T.
Magn Reson Imaging. 1989 Mar-Apr;7(2):203-10.
PMID: 2716486 [PubMed - indexed for MEDLINE]

121: Narayana PA, Slopis JM, Jackson EF, Hazle JD, Kulkarni MV, Butler IJ.
 In vivo muscle magnetic resonance spectroscopy in a family with mitochondrial
cytopathy: a defect in fat metabolism.
Magn Reson Imaging. 1989 Mar-Apr;7(2):133-9.
PMID: 2716480 [PubMed - indexed for MEDLINE]

122: Kulkarni MV, Bondurant FJ, Rose SL, Narayana PA.
 1.5 tesla magnetic resonance imaging of acute spinal trauma.
Radiographics. 1988 Nov;8(6):1059-82.
PMID: 3205929 [PubMed - indexed for MEDLINE]

123: Narayana PA, Jackson EF, Hazle JD, Fotedar LK, Kulkarni MV, Flamig DP.
 In vivo localized proton spectroscopic studies of human gastrocnemius muscle.
Magn Reson Med. 1988 Oct;8(2):151-9. Erratum in: Magn Reson Med 1989
Jul;11(1):134.
PMID: 2850438 [PubMed - indexed for MEDLINE]

124: Kulkarni MV, Narayana PA, McArdle CB, Yeakley JW, Campagna NF, Wehrli FW.
 Cervical spine MR imaging using multislice gradient echo imaging: comparison with
cardiac gated spin echo.
Magn Reson Imaging. 1988 Sep-Oct;6(5):517-25.
PMID: 3226236 [PubMed - indexed for MEDLINE]

125: Narayana PA, Hazle JD, Jackson EF, Fotedar LK, Kulkarni MV.
 In vivo 1H spectroscopic studies of human gastrocnemius muscle at 1.5 T.
Magn Reson Imaging. 1988 Sep-Oct;6(5):481-5.
PMID: 3226233 [PubMed - indexed for MEDLINE]

126: Raval B, Kulkarni M, Narayana P, Mehta S.
 Fast magnetic resonance in vascular diseases of the abdomen.
Magn Reson Imaging. 1988 Jul-Aug;6(4):473-7.
PMID: 3185140 [PubMed - indexed for MEDLINE]

127: Narayana PA, Brey WW, Kulkarni MV, Sievenpiper CL.
 Compensation for surface coil sensitivity variation in magnetic resonance
imaging.
Magn Reson Imaging. 1988 May-Jun;6(3):271-4.
PMID: 3398733 [PubMed - indexed for MEDLINE]

128: Brey WW, Narayana PA.
 Correction for intensity falloff in surface coil magnetic resonance imaging.
Med Phys. 1988 Mar-Apr;15(2):241-5.
PMID: 3386597 [PubMed - indexed for MEDLINE]

129: Krishna YV, Aruna B, Narayana PA.
 Electron spin echo studies of hemoglobin cyanide and nitroxide derivatives.
Biochim Biophys Acta. 1987 Nov 5;916(1):48-53.
PMID: 2822127 [PubMed - indexed for MEDLINE]

130: Jensen DJ, Brey WW, Delayre JL, Narayana PA.
 Reduction of pulsed gradient settling time in the superconducting magnet of a
magnetic resonance instrument.
Med Phys. 1987 Sep-Oct;14(5):859-62.
PMID: 3683316 [PubMed - indexed for MEDLINE]

131: Narayana PA, Wolinsky JS, Jensen DJ.
 Magnetic resonance imaging of experimental mumps meningoencephalitis in suckling 
hamsters.
Magn Reson Med. 1987 Jun;4(6):597-601.
PMID: 3613960 [PubMed - indexed for MEDLINE]

132: Jensen DJ, Delayre JL, Narayana PA.
 An incremental phase shifter and frequency modulator for magnetic resonance
imaging and spectroscopy.
IEEE Trans Biomed Eng. 1987 Apr;34(4):310-3. No abstract available.
PMID: 3504205 [PubMed - indexed for MEDLINE]

133: Narayana PA, Brey WW, Kulkarni MV, Misra LK.
 In vivo proton spin-lattice relaxation times of normal and dystrophic muscles.
Magn Reson Med. 1987 Feb;4(2):153-61.
PMID: 3561244 [PubMed - indexed for MEDLINE]

134: Kulkarni MV, Williams JC, Yeakley JW, Andrews JL, McArdle CB, Narayana PA,
Howell RR, Jonas AJ.
 Magnetic resonance imaging in the diagnosis of the cranio-cervical manifestations
of the mucopolysaccharidoses.
Magn Reson Imaging. 1987;5(5):317-23.
PMID: 3121973 [PubMed - indexed for MEDLINE]

135: Jensen DJ, Narayana PA, Delayre JL.
 Pulse sequence design for volume selective excitation in magnetic resonance.
Med Phys. 1987 Jan-Feb;14(1):38-42.
PMID: 3561334 [PubMed - indexed for MEDLINE]

136: Narayana PA, Delayre JL, Misra LK.
 In vivo 31P NMR studies of avian dystrophic muscles.
Magn Reson Med. 1986 Aug;3(4):549-53.
PMID: 3747816 [PubMed - indexed for MEDLINE]

137: Narayana PA, Ophir J.
 The measurement of attenuation in nonlinearly attenuating media by the zero
crossing method.
Ultrasound Med Biol. 1984 Nov-Dec;10(6):715-8.
PMID: 6536127 [PubMed - indexed for MEDLINE]

138: Ophir J, Shawker TH, Maklad NF, Miller JG, Flax SW, Narayana PA, Jones JP.
 Attenuation estimation in reflection: progress and prospects.
Ultrason Imaging. 1984 Oct;6(4):349-95. Review.
PMID: 6399169 [PubMed - indexed for MEDLINE]

139: Narayana PA, Ophir J, Maklad NF.
 The attenuation of ultrasound in biological fluids.
J Acoust Soc Am. 1984 Jul;76(1):1-4.
PMID: 6747101 [PubMed - indexed for MEDLINE]

140: Beall PT, Narayana PA, Amtey SR, Spiga L, Intra E, Ridella S, Mela GS.
 The systemic effect of cancers on human sera proton NMR relaxation times.
Magn Reson Imaging. 1984;2(2):83-7.
PMID: 6085132 [PubMed - indexed for MEDLINE]

141: Ophir J, Narayana PA.
 Effect of half-wavelength membranes on the axial resolution of real-time
ultrasonic scanners.
J Acoust Soc Am. 1983 Sep;74(3):687-90.
PMID: 6630723 [PubMed - indexed for MEDLINE]

142: Narayana PA, Ophir J.
 On the validity of the linear approximation in the parametric measurement of
attenuation in tissues.
Ultrasound Med Biol. 1983 Jul-Aug;9(4):357-61.
PMID: 6649153 [PubMed - indexed for MEDLINE]

143: Narayana PA, Ophir J.
 Spectral shifts of ultrasonic propagation: a study of theoretical and
experimental models.
Ultrason Imaging. 1983 Jan;5(1):22-9.
PMID: 6683016 [PubMed - indexed for MEDLINE]

144: Narayana PA, Ophir J.
 A closed form method for the measurement of attenuation in nonlinearly dispersive
media.
Ultrason Imaging. 1983 Jan;5(1):17-21.
PMID: 6683015 [PubMed - indexed for MEDLINE]