Masahiko Uzura
St. Marianna University School of Medicine
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Featured researches published by Masahiko Uzura.
European Radiology | 2005
Yoshimasa Imanishi; Atsushi Fukui; Hiroshi Niimi; Daisuke Itoh; Kyouko Nozaki; Shunsuke Nakaji; Kumiko Ishizuka; Hitoshi Tabata; Yu Furuya; Masahiko Uzura; Hideto Takahama; Suzuo Hashizume; Shiro Arima; Yasuo Nakajima
As imaging technologies become increasingly advanced, it is possible to obtain detailed morphological information as well as functional imaging data. In some imaging technologies, the radiation dose increases with the ability to obtain better images or more detailed information. We encountered three cases of temporary bandage-shaped hair loss, which was caused by perfusion studies of the head by multi-detector row computed tomography (MDCT) for evaluation of cerebral blood flow in patients with vascular disorders. In all three patients with temporary hair loss, two angiographies of the head had been performed in the period of serial CT examinations. This suggested the possibility that radiation exposure from angiography performed in serial examinations, combined with the perfusion studies of the head with MDCT, played an important role in this temporary, bandage-shaped hair loss. Radiologists should be aware that a cumulative or multiplier effect of radiation exposure from multiple diagnostic techniques may result in hair loss and other types of radiation complications.
Acta neurochirurgica | 1992
Takeki Ogawa; Hiroaki Sekino; Masahiko Uzura; T. Sakamoto; Yoshio Taguchi; Yoshitaro Yamaguchi; Tatsuo Hayashi; I. Yamanaka; N. Oohama; S. Imaki
The distribution, frequency, and appearance of head injuries were evaluated with MRI and CT in a prospective study of 155 patients with acute (n = 124) and chronic (n = 31) head injuries. MRI was significantly more sensitive than CT in the detection of intraaxial injury at any stage. In severe cases, central structure lesions were detected in approximately 80% of patients. Severity on admission was compatible with MR findings. However it was difficult to decide on neurobehavioural prognosis from initial MRI findings only.
Acta neurochirurgica | 2003
H. Nakamura; Masahiko Uzura; K. Uchida; H. Nakayama; Y. Furuya; Tatsuo Hayashi; Hiroaki Sekino; M. Ominato; S. Owada
The purpose of this study is to clarify the influence of a novel free radical scavenger edaravone on experimental brain injury. Male Wistar rats were anesthetized with 1-2% halothane. Brain injury was produced using a controlled cortical impact injury device. Experimental rats were divided into 2 groups. In the edaravone group, edaravone (3 mg/kg) was twice administered intravenously for 30 minutes. In the saline group, saline solution was administered in the same way. This administration of edaravone or saline solution made it possible to evaluate the relative effects of edaravone by assessment of free radical reaction and water content. As a result, the level of oxygen free radicals at 50 minutes after brain injury was significantly lower in the edaravone group than in the saline group. The water content in the injured brain at 180 minutes was significantly lower in the edaravone group than in the saline group. Therefore, we propose that edaravone may be effective for treatment in head injury.
Childs Nervous System | 2005
Masahiko Uzura; Yu Furuya; Katsuya Akashi; Hiroaki Sekino
Case reportA 3-year-old girl was transferred to our hospital with a history of persistent open anterior fontanel. The patient was conscious and had no neurological deficits. Upon arrival, the patient appeared normal for her age and had no defects or anomalies other than the aforementioned lesion. The initial skull X-ray and CT were significant for a 20-mm open anterior fontanel. All other findings were normal.OutcomeAfter a follow-up period of 1.5 years, the anterior fontanel was still open, with a slight decrease in size to 15 mm. Delayed closure of the anterior fontanel without intracranial hypertension is associated with various disorders. The pathogenesis of the current patient’s condition is unclear. Due to the patient’s normal appearance and stable neurological status, we will follow her conservatively for any changes in condition.
Journal of Trauma-injury Infection and Critical Care | 2001
Yoshio Taguchi; Motoshi Matsuzawa; Jun Ming Ye; Masahiko Uzura; Hiroyuki Watanabe; Minako Hayakawa
Surgery for Cerebral Stroke | 1991
Yoshitaro Yamaguchi; Tomoko Ozawa; Youtaro Sakakibara; Yoshihiro Hosikawa; Tuyoshi Katabami; Kouichi Yamashita; Masahiko Uzura; Shigeki Adachi; Juuzou Abe; Tatuo Sakamoto; Hiroaki Sekino
Journal of St. Marianna University | 2013
Homare Nakamura; Masahiko Uzura; Yu Furuya
Nihon Kyukyu Igakukai Zasshi | 2006
Masahiko Uzura; Kazuyoshi Uchida; Motoshi Matsuzawa; Takuo Hashimoto; Yoshiyuki Minowa; Katsuya Akashi
Nihon Kyukyu Igakukai Zasshi | 2001
Kazuyoshi Uchida; Masahiko Uzura; Yoshio Hazama; Hirofumi Nakayama; Hiroaki Sekino
Japanese Journal of Neurosurgery | 2001
Yoshio Taguchi; Tatsuo Sakamoto; Masahiko Uzura; Motoshi Matsuzawa; Yasuji Miyakita