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Unilateral loss of thoracic motion after blunt trauma: a sign of acute Brown-Séquard syndrome
Mizuki Sato,Akira Kuriyama,Ryo Ohtomo 대한응급의학회 2019 Clinical and Experimental Emergency Medicine Vol.6 No.3
Late-onset Brown-Séquard syndrome (BSS) is a rare condition resulting from a spinal cord injury that develops weeks to years after a blunt trauma. Acute-onset BSS after a blunt injury has been rarely reported. Here, we report on a case of BSS, in a 58-year-old man, that developed immediately after a motor vehicle accident. Upon admission, loss of right thoracic motion, complete right paresis, and loss of pain and temperature sensations below the C3 level on the left side were observed. Magnetic resonance imaging showed hyperintensities within the cervical spinal cord at the C2–C3 level, confirming the diagnosis of BSS. Thoracic motion rapidly recovered, but other neurological sequelae persisted. BSS related to cervical cord injury should be suspected when patients develop hemiparesis and contralateral sensory loss immediately after a blunt trauma. Likewise, clinicians should be aware that unilateral loss of thoracic motion could be an important sign of BSS.
Injection Study of 6-Sector PRISM-FFAG Using Pulsed Alpha Particles
Takahisa Itahashi,Yasushi Arimoto,Yasutoshi Kuriyama,Makoto Yoshida,Imam Hossain,Shinnya Araki,Akira Sato,Yousuke Eguchi,Yoshihito Nakanishi,Masaharu Aoki,Yoshitaka Kuno,Toshiyuki Oki,Chihiro Ohmori,Y 한국물리학회 2009 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.54 No.1
An experiment is proposed to study a novel technique of muon phase rotation for storage rings using pulsed alpha-particle injection from a standard radioactive 241Am source into an ultra-high field gradient RF cavity of a storage ring. The 6-sector PRISM-FFAG ring is specically considered. The specifications of the pulser, in ector and electrodes for guiding the 241Am-source to a sector are described based on simulation studies. The method of RF-particle TOF measurement demonstrates the validity of the proposed method. An experiment is proposed to study a novel technique of muon phase rotation for storage rings using pulsed alpha-particle injection from a standard radioactive 241Am source into an ultra-high field gradient RF cavity of a storage ring. The 6-sector PRISM-FFAG ring is specically considered. The specifications of the pulser, in ector and electrodes for guiding the 241Am-source to a sector are described based on simulation studies. The method of RF-particle TOF measurement demonstrates the validity of the proposed method.