論文 - 長縄　慎二

3D-Fast Spin Echo法を用いた内耳器官微細構造の観察

日本医学放射線学会雑誌   55 巻 ( 1 ) 頁： 81-82   1995年

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記述言語：英語  

Inner ear barotrauma: computed tomographic evaluation. 査読有り

Nakashima T, Yanagita N, Yamakawa K, Naganawa S

Clin Otolaryngol Allied Sci   20 巻 ( 6 ) 頁： 544-546   1995年

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

Eight patients with inner ear barotrauma were evaluated by computed tomography. The causes of the inner ear barotrauma were diving in four, flying in an airplane in three, and climbing in one. Regarding the width of the cochlear aqueduct, no significant difference was observed between the affected side (3.28 +/- 0.49 mm) and non-affected side (3.63 +/- 0.79 mm) at the base of the infundibulum. The jugular fossa could not be identified on the affected side in three patients. Some relationship may exist between inner ear barotrauma and poor development of the jugular fossa.

High resolution MR imaging of the inner ear apparatus using 3D-Fast spin echo sequence 査読有り

Naganawa S, Senda K, Yamakawa K, Fukatsu H, Ishigaki T, Nakashima T, Sugimoto H, Aoki I, Takai H

Nippon Igaku Hoshasen Gakkai Zasshi   55 巻 ( 1 ) 頁： 81-82   1995年

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担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）  

To evaluate the efficacy of high resolution MR imaging of the inner ear with 3D-Fast spin echo sequence, one volunteer and 12 patients were imaged with a 1.5 T MR scanner. High resolution T2-weighted images were obtained with a head coil in 13 minutes, and the voxel size was 0.39mm x 0.45mm x 1.2mm in most subjects. Original images and maximum intensity projection (MIP) images of the inner ear were evaluated. On original images, the endolymphatic duct was visualized in 72% of subjects, the cochlear aqueduct in 96%, three branches of the cranial nerves in the internal auditory canal in 100%, and flow void of the vessel in the cerebellopontine angle in 100%. On MIP images, more than two cochlear turns were visualized in 92% of subjects, three semicircular canals in 100%, and the anterior and posterior ampulla in 100%. MR imaging of the inner ear with 3D-Fast Spin Echo sequence provides a variety of useful information regarding the anatomy around the inner ear.

Flow velocity and volume measurement of superior and interior mesenteric artery with cine phase contrast magnetic resonance imaging

Radiation Medicine   12 巻 ( 5 ) 頁： 213-220   1994年

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記述言語：英語  

Rapid MR imaging of the liver

Radiation Medicine   12 巻 ( 6 ) 頁： 255-261   1994年

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記述言語：英語  

Magnetic Resonance imaging of the endolymphotic duct and sae in Meniere's disease

Auris-Nasus-Larynx   19 巻 ( supl. ) 頁： 81-87   1992年

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記述言語：英語  

前庭水管のMRI-正常者とメニエ-ル病患者における撮像の試み

日本医学放射線学会雑誌   51 巻 ( 3 ) 頁： 213-218   1991年

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記述言語：英語  

Evaluation of clearance function of the Eustachian tube by sequential contrast CT. 査読有り

Niwa H, Takahashi M, Yanagita N, Naganawa S

Acta Otolaryngol Suppl   471 巻   頁： 43-50   1990年

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

Comparisons of Eustachian tube (ET) functions studied by sequential contrast computerized tomography (CT) and by tubotympanic aerodynamics (TTAG) were made. ET clearance function was assessed by the shape of the cartilaginous portion before, during and at the end of swallowing; ventilatory function was studied by TTAG. ET clarity, real-time dynamics and resolution were all better when observed with sequential CT. Contrast medium was instilled into the middle ear via a drumhead perforation and 1 scan/sec taken during swallowing. We classified ET function based on the presence or absence of a) movement of the cartilaginous portion, and b) contrast medium in the ET as i) movement present, contrast medium seen in ET: ii) movement absent, contrast medium present in ET; and iii) movement present, no contrast medium in the ET. Ventilatory and clearance functions did not parallel one another, attributable to some mechanical, differences between the two functions.