Virtual endoscopy of the labyrinth, using a 3D‐FastASE sequence

Naganawa, Shinji; Iwayama, Eriko; Koshikawa, Tokiko; Fukatsu, Hiroshi; Ishigaki, Takeo; Ninomiya, Ayako; Aoki, Ikuo

doi:10.1002/jmri.1110

Cited by 3 publications

(2 citation statements)

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“…Volumetric presentation of the labyrinthine fluid space has been reported previously for the entire fluid space based on 3D‐fast spin echo data (9), and on 3D‐CISS data (10). Virtual endoscopic presentations without the separation of endo‐/perilymph space have also been reported (11).…”

Section: Discussionmentioning

confidence: 99%

Three‐dimensional (3D) visualization of endolymphatic hydrops after intratympanic injection of Gd‐DTPA: Optimization of a 3D‐real inversion‐recovery turbo spin‐echo (TSE) sequence and application of a 32‐channel head coil at 3T

Naganawa

Ishihara

Iwano

et al. 2009

Magnetic Resonance Imaging

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Purpose:To enable volume visualization of endolymphatic hydrops of Ménière's disease via a volume rendering (VR) technique, a three‐dimensional (3D) inversion‐recovery (IR) sequence with real reconstruction (3D‐real IR) sequence after intratympanic injection of Gd‐DTPA was optimized for higher spatial resolution using a 32‐channel head coil at 3T.Materials and Methods:Pulse sequence parameters were optimized using a diluted Gd‐DTPA phantom. Then, 11 patients who had been clinically diagnosed with Ménière's disease and a patient with sudden hearing loss were scanned. Images were processed using commercially available 3D‐VR software. 3D‐real IR data was processed to produce endolymph and perilymph fluid volume images in different colors. 3D‐CISS data was processed to generate total fluid volume images.Results:While maintaining a comparable signal‐to‐noise ratio (SNR) and scan time, the voxel volume could be reduced from 0.4 × 0.4 × 2 mm3 with a 12‐channel coil to 0.4 × 0.4 × 0.8 mm3 with a 32‐channel coil. A newly‐optimized protocol allowed the smooth, three‐dimensional visualization of endolymphatic hydrops in all patients with Ménière's disease.Conclusion:Volumetrically separate visualization of endo‐/perilymphatic space is now feasible in patients with Ménière's disease using an optimized 3D‐real IR sequence, a 32‐channel head coil, at 3T, after intratympanic administration of Gd‐DTPA. This will aid the understanding of the pathophysiology of Ménière's disease. J. Magn. Reson. Imaging 2010;31:210–214. © 2009 Wiley‐Liss, Inc.

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Section: Discussionmentioning

confidence: 99%

Three‐dimensional (3D) visualization of endolymphatic hydrops after intratympanic injection of Gd‐DTPA: Optimization of a 3D‐real inversion‐recovery turbo spin‐echo (TSE) sequence and application of a 32‐channel head coil at 3T

Naganawa

Ishihara

Iwano

et al. 2009

Magnetic Resonance Imaging

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“…Most in vivo studies have investigated the use of high‐resolution magnetic resonance in obtaining inner ear volumetric measurements, 5 applying these data largely to the study of patients with large endolymphatic duct and sac. 6–9 The use of magnetic resonance in “virtual endoscopy” of the labyrinth 10 has also been performed to study patients with acoustic neuroma and hypoplasia of the lateral semicircular canal. Spatial resolution was again limited to several hundreds of micrometers in voxel size.…”

Section: Introductionmentioning

confidence: 99%

High‐Resolution Magnetic Resonance Imaging of Human Cochlea

et al. 2002

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Current awareness in NMR in biomedicine

2002

NMR in Biomedicine

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In order to keep subscribers up‐to‐date with the latest developments in their field, John Wiley & Sons are providing a current awareness service in each issue of the journal. The bibliography contains newly published material in the field of NMR in biomedicine. Each bibliography is divided into 9 sections: 1 Books, Reviews ' Symposia; 2 General; 3 Technology; 4 Brain and Nerves; 5 Neuropathology; 6 Cancer; 7 Cardiac, Vascular and Respiratory Systems; 8 Liver, Kidney and Other Organs; 9 Muscle and Orthopaedic. Within each section, articles are listed in alphabetical order with respect to author. If, in the preceding period, no publications are located relevant to any one of these headings, that section will be omitted.

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Virtual endoscopy of the labyrinth, using a 3D‐FastASE sequence

Cited by 3 publications

References 25 publications

Three‐dimensional (3D) visualization of endolymphatic hydrops after intratympanic injection of Gd‐DTPA: Optimization of a 3D‐real inversion‐recovery turbo spin‐echo (TSE) sequence and application of a 32‐channel head coil at 3T

Three‐dimensional (3D) visualization of endolymphatic hydrops after intratympanic injection of Gd‐DTPA: Optimization of a 3D‐real inversion‐recovery turbo spin‐echo (TSE) sequence and application of a 32‐channel head coil at 3T

High‐Resolution Magnetic Resonance Imaging of Human Cochlea

Current awareness in NMR in biomedicine

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