Masahiro Yamazaki

Summary

Affiliation: Nagoya University
Country: Japan

Publications

  1. doi Gadolinium distribution in cochlear perilymph: differences between intratympanic and intravenous gadolinium injection
    Masahiro Yamazaki
    Department of Radiology, Nagoya University Graduate School of Medicine, 65 Tsurumai Cho, Showa Ku, Nagoya 466 8550, Japan
    Neuroradiology 54:1161-9. 2012
  2. doi Comparison of contrast effect on the cochlear perilymph after intratympanic and intravenous gadolinium injection
    M Yamazaki
    Department of Radiology, Nagoya University Graduate School of Medicine, Nagoya, Japan
    AJNR Am J Neuroradiol 33:773-8. 2012
  3. doi Increased signal intensity of the cochlea on pre- and post-contrast enhanced 3D-FLAIR in patients with vestibular schwannoma
    Masahiro Yamazaki
    Department of Radiology, Graduate School of Medicine, Nagoya University, 65 Tsurumai Cho, Showa Ku, Nagoya 466 8550, Japan
    Neuroradiology 51:855-63. 2009
  4. ncbi Signal alteration of the cochlear perilymph on 3 different sequences after intratympanic Gd-DTPA administration at 3 tesla: comparison of 3D-FLAIR, 3D-T1-weighted imaging, and 3D-CISS
    Masahiro Yamazaki
    Department of Radiology, Nagoya University Graduate School of Medicine, Shouwa ku, Nagoya, Japan
    Magn Reson Med Sci 9:65-71. 2010
  5. ncbi Estimation of perilymph enhancement after intratympanic administration of Gd-DTPA by fast T₁-mapping with a dual flip angle 3D spoiled gradient echo sequence
    Shinji Naganawa
    Department of Radiology, Nagoya University Graduate School of Medicine
    Magn Reson Med Sci 12:223-8. 2013
  6. doi Magnetic resonance imaging of the inner ear after both intratympanic and intravenous gadolinium injections
    Tatsuo Iida
    Department of Otorhinolaryngology, Nagoya University, Nagoya, Japan
    Acta Otolaryngol 133:434-8. 2013
  7. ncbi Imaging of Ménière's disease by subtraction of MR cisternography from positive perilymph image
    Shinji Naganawa
    Department of Radiology, Nagoya University Graduate School of Medicine, Nagoya, Japan
    Magn Reson Med Sci 11:303-9. 2012
  8. doi Contrast enhancement of the inner ear after intravenous administration of a standard or double dose of gadolinium contrast agents
    Hirokazu Suzuki
    Department of Otorhinolaryngology, Nagoya University, Graduate School of Medicine, Japan
    Acta Otolaryngol 131:1025-31. 2011
  9. doi Contrast enhancement of the inner ear in magnetic resonance images taken at 10 minutes or 4 hours after intravenous gadolinium injection
    Rui Sano
    Department of Otorhinolaryngology, Nagoya University Graduate School of Medicine, Japan
    Acta Otolaryngol 132:241-6. 2012
  10. ncbi Imaging of Ménière's disease after intravenous administration of single-dose gadodiamide: utility of multiplication of MR cisternography and HYDROPS image
    Shinji Naganawa
    Department of Radiology, Nagoya University Graduate School of Medicine, Nagoya, Japan
    Magn Reson Med Sci 12:63-8. 2013

Detail Information

Publications28

  1. doi Gadolinium distribution in cochlear perilymph: differences between intratympanic and intravenous gadolinium injection
    Masahiro Yamazaki
    Department of Radiology, Nagoya University Graduate School of Medicine, 65 Tsurumai Cho, Showa Ku, Nagoya 466 8550, Japan
    Neuroradiology 54:1161-9. 2012
    ....
  2. doi Comparison of contrast effect on the cochlear perilymph after intratympanic and intravenous gadolinium injection
    M Yamazaki
    Department of Radiology, Nagoya University Graduate School of Medicine, Nagoya, Japan
    AJNR Am J Neuroradiol 33:773-8. 2012
    ..The purpose of this study was to compare the degree of perilymph enhancement with the 2 methods and the perilymph contrast-effect difference with the IV-method in both sides in patients with unilateral Ménière disease...
  3. doi Increased signal intensity of the cochlea on pre- and post-contrast enhanced 3D-FLAIR in patients with vestibular schwannoma
    Masahiro Yamazaki
    Department of Radiology, Graduate School of Medicine, Nagoya University, 65 Tsurumai Cho, Showa Ku, Nagoya 466 8550, Japan
    Neuroradiology 51:855-63. 2009
    ....
  4. ncbi Signal alteration of the cochlear perilymph on 3 different sequences after intratympanic Gd-DTPA administration at 3 tesla: comparison of 3D-FLAIR, 3D-T1-weighted imaging, and 3D-CISS
    Masahiro Yamazaki
    Department of Radiology, Nagoya University Graduate School of Medicine, Shouwa ku, Nagoya, Japan
    Magn Reson Med Sci 9:65-71. 2010
    ....
  5. ncbi Estimation of perilymph enhancement after intratympanic administration of Gd-DTPA by fast T₁-mapping with a dual flip angle 3D spoiled gradient echo sequence
    Shinji Naganawa
    Department of Radiology, Nagoya University Graduate School of Medicine
    Magn Reson Med Sci 12:223-8. 2013
    ..We could predict poor contrast enhancement in these 2 patients using the FT₁-map technique...
  6. doi Magnetic resonance imaging of the inner ear after both intratympanic and intravenous gadolinium injections
    Tatsuo Iida
    Department of Otorhinolaryngology, Nagoya University, Nagoya, Japan
    Acta Otolaryngol 133:434-8. 2013
    ..The MRI revealed a difference of intracochlear Gd distribution between the IT injection side and the contralateral IV side...
  7. ncbi Imaging of Ménière's disease by subtraction of MR cisternography from positive perilymph image
    Shinji Naganawa
    Department of Radiology, Nagoya University Graduate School of Medicine, Nagoya, Japan
    Magn Reson Med Sci 11:303-9. 2012
    ....
  8. doi Contrast enhancement of the inner ear after intravenous administration of a standard or double dose of gadolinium contrast agents
    Hirokazu Suzuki
    Department of Otorhinolaryngology, Nagoya University, Graduate School of Medicine, Japan
    Acta Otolaryngol 131:1025-31. 2011
    ..Imaging of the endolymphatic space was possible in most cases after administering a standard dose of gadolinium (Gd) by using heavily T2-weighted 3D fluid-attenuated inversion recovery (hT(2)W-3D-FLAIR) magnetic resonance imaging (MRI)...
  9. doi Contrast enhancement of the inner ear in magnetic resonance images taken at 10 minutes or 4 hours after intravenous gadolinium injection
    Rui Sano
    Department of Otorhinolaryngology, Nagoya University Graduate School of Medicine, Japan
    Acta Otolaryngol 132:241-6. 2012
    ..Using heavily T2-weighted 3D-FLAIR MRI, visualization of endolymphatic hydrops (EH) was possible in the vestibule and the cochlea after a standard intravenous dose of Gd...
  10. ncbi Imaging of Ménière's disease after intravenous administration of single-dose gadodiamide: utility of multiplication of MR cisternography and HYDROPS image
    Shinji Naganawa
    Department of Radiology, Nagoya University Graduate School of Medicine, Nagoya, Japan
    Magn Reson Med Sci 12:63-8. 2013
    ..Ten patients with suspected Ménière's disease were included. The average CNR of generated images increased to more than 200 times that of HYDROP images...
  11. ncbi Imaging of Ménière's disease after intravenous administration of single-dose gadodiamide: utility of subtraction images with different inversion time
    Shinji Naganawa
    Department of Radiology, Nagoya University Graduate School of Medicine, Nagoya, Japan
    Magn Reson Med Sci 11:213-9. 2012
    ..Subtraction significantly improved the contrast noise ratio between endolymph and perilymph and the subjective visibility score for endolymphatic space. The 24 patients with the suspect of Ménière's disease were included...
  12. ncbi Three-dimensional visualization of endolymphatic hydrops after intravenous administration of single-dose gadodiamide
    Shinji Naganawa
    Department of Radiology, Nagoya University Graduate School of Medicine, 65 Tsurumai Cho, Shouwa ku, Nagoya 466 8550, Japan
    Magn Reson Med Sci 12:147-51. 2013
    ..Such dimensional visualization will aid understanding of the pathophysiology of Ménière's disease. ..
  13. ncbi Imaging of endolymphatic and perilymphatic fluid after intravenous administration of single-dose gadodiamide
    Shinji Naganawa
    Department of Radiology, Nagoya University Graduate School of Medicine, Nagoya, Japan
    Magn Reson Med Sci 11:145-50. 2012
    ..We observed high signal of cochlear endolymph in 17 ears with cochlear endolymphatic hydrops but not 11 ears without cochlear endolymphatic hydrops...
  14. ncbi Visualization of endolymphatic hydrops in Ménière's disease after single-dose intravenous gadolinium-based contrast medium: timing of optimal enhancement
    Shinji Naganawa
    Department of Radiology, Nagoya University Graduate School of Medicine, 65 Tsurumai Cho, Shouwa ku, Nagoya 466 8550, Japan
    Magn Reson Med Sci 11:43-51. 2012
    ..We investigated if that optimal timing is earlier or later than 4 hours...
  15. doi Endolymphatic hydrops and blood-labyrinth barrier in Ménière's disease
    Mitsuhiko Tagaya
    Department of Otorhinolaryngology, Graduate School of Medicine, Nagoya University, 65 Tsurumai, Showa, Nagoya, Aichi, Japan
    Acta Otolaryngol 131:474-9. 2011
    ..The blood-labyrinth barrier is impaired in association with the hydrops grade in Ménière's disease...
  16. doi Endolymphatic hydrops in patients with tinnitus as the major symptom
    Tadao Yoshida
    Department of Otorhinolaryngology, Nagoya University Graduate School of Medicine, 65, Tsurumai cho, Showa Ku, 466 8550, Nagoya, Japan
    Eur Arch Otorhinolaryngol 270:3043-8. 2013
    ..Our study revealed that patients who had tinnitus as their major symptom often had EH. Using MRI to identify this covert early EH in patients who have tinnitus as their major symptom may broaden the treatment options for tinnitus...
  17. doi Endolymphatic hydrops revealed by magnetic resonance imaging in patients with atypical Meniere's disease
    Masahiro Kato
    Department of Otorhinolaryngology, Nagoya University Graduate School of Medicine, Nagoya, Japan
    Acta Otolaryngol 133:123-9. 2013
    ..Using an imaging method, we provide evidence that atypical Meniere's disease is a true variant of classic Meniere's disease...
  18. ncbi Visualization of endolymphatic hydrops after intratympanic injection of Gd-DTPA: comparison of 2D and 3D real inversion recovery imaging
    Shinji Naganawa
    Department of Radiology, Nagoya University, Graduate School of Medicine, Shouwa ku, Nagoya, Japan
    Magn Reson Med Sci 10:101-6. 2011
    ..This technique enables differentiation of bone and endo- and perilymph space on a single image but requires 15 min of scan time. Therefore, we compared it with 2D real IR, which is faster...
  19. ncbi Visualization of endolymphatic hydrops in Ménière's disease with single-dose intravenous gadolinium-based contrast media using heavily T(2)-weighted 3D-FLAIR
    Shinji Naganawa
    Department of Radiology, Nagoya University Graduate School of Medicine, Shouwa, Nagoya, Japan
    Magn Reson Med Sci 9:237-42. 2010
    ..This technique can be implemented in a clinical setting...
  20. ncbi Contrast enhancement of the anterior eye segment and subarachnoid space: detection in the normal state by heavily T2-weighted 3D FLAIR
    Shinji Naganawa
    Department of Radiology, Nagoya University Graduate School of Medicine, Nagoya, Japan
    Magn Reson Med Sci 10:193-9. 2011
    ....
  21. pmc Visualization of white matter tracts using a non-diffusion weighted magnetic resonance imaging method: does intravenous gadolinium injection four hours prior to the examination affect the visualization of white matter tracts?
    Masahiro Yamazaki
    Department of Radiology, Nagoya University Graduate School of Medicine, Nagoya, Japan
    PLoS ONE 9:e91860. 2014
    ..From this perspective, the purpose of this study was to elucidate if the use of gadolinium affects the visualization of WM-tracts on hT2w-3D-FLAIR...
  22. ncbi MR imaging of Ménière's disease after combined intratympanic and intravenous injection of gadolinium using HYDROPS2
    Shinji Naganawa
    Department of Radiology, Nagoya University Graduate School of Medicine
    Magn Reson Med Sci 13:133-7. 2014
    ....
  23. ncbi Establishing normal diameter range of the cochlear and facial nerves with 3D-CISS at 3T
    Rei Nakamichi
    Department of Radiology, Nagoya University Graduate School of Medicine
    Magn Reson Med Sci 12:241-7. 2013
    ..We explored normal diameter values of the cochlear (CN) and facial (FN) nerves on 3-dimensional constructive interference in steady state (3D-CISS) using a 3-tesla magnetic resonance (MR) imaging scanner...
  24. ncbi Time course for measuring endolymphatic size in healthy volunteers following intravenous administration of gadoteridol
    Shinji Naganawa
    Department of Radiology, Nagoya University Graduate School of Medicine
    Magn Reson Med Sci 13:73-80. 2014
    ..We used the methods to measure the size of the endolymph in healthy volunteers at various times after IV-SD-GBCM and attempted to determine the optimal timing for the evaluation...
  25. ncbi Anatomical details of the brainstem and cranial nerves visualized by high resolution readout-segmented multi-shot echo-planar diffusion-weighted images using unidirectional MPG at 3T
    Shinji Naganawa
    Department of Radiology, Nagoya University Graduate School of Medicine, Japan
    Magn Reson Med Sci 10:269-75. 2011
    ....
  26. pmc Visualization of brain white matter tracts using heavily t2-weighted three-dimensional fluid-attenuated inversion-recovery magnetic resonance imaging
    Masahiro Yamazaki
    Department of Radiology, Nagoya University Graduate School of Medicine, Nagoya, Japan
    Nagoya J Med Sci 76:285-91. 2014
    ..In conclusion, the CST, ML, and SCP were visualized as high intensity on hT2w-3D-FLAIR. This technique is a potentially supplemental DTI neurographic modality. ..
  27. ncbi Serial scans in healthy volunteers following intravenous administration of gadoteridol: time course of contrast enhancement in various cranial fluid spaces
    Shinji Naganawa
    Department of Radiology, Nagoya University Graduate School of Medicine
    Magn Reson Med Sci 13:7-13. 2014
    ..To elucidate the time course of contrast enhancement in healthy volunteers, we obtained hT2W-3D-FLAIR serially after IV-SD-GBCM...
  28. doi Semi-automatic volumetric measurement of lung cancer using multi-detector CT effects of nodule characteristics
    Shingo Iwano
    Department of Radiology, Nagoya University Graduate School of Medicine, 65 Tsurumai Cho, Shouwa ku, Nagoya 4668550, Japan
    Acad Radiol 16:1179-86. 2009
    ....