Title :
Image analysis of quick phase eye movement in nystagmus
Author :
Iijima, Atsuhiko ; Ueno, Akinori ; Nishimura, Minoru ; Ishikawa, Norio ; Hosaka, Hidehiro ; Minamitani, Haruyuki
Author_Institution :
Inst. of Biomed. Eng., Keio Univ., Kanagawa, Japan
Abstract :
A high speed video camera was used for analysis of quick phase eye movement in nystagmus. The frame rate of the camera was 250 Hz. Using a rotary slit-light projection system, optokinetic nystagmus (OKN) was easily evoked and the consequent eye movement was analysed by an image processing system. The high velocity component in nystagmus can be precisely detected with 250 Hz video rate while those with 30 Hz conventional rate showed a poor result in which the high velocity component declined significantly. The high speed video system was suitable for the analysis of the quick phase of nystagmus, especially in clinical diagnosis
Keywords :
CCD image sensors; biomedical imaging; brain; eye; infrared imaging; medical image processing; optical projectors; video cameras; 250 Hz; 600 nm; 750 nm; brain stem disorder; clinical diagnosis; frame rate; high speed video camera; high velocity component; image analysis; image processing system; nystagmus; optokinetic nystagmus; quick phase eye movement; rotary slit-light projection system; vertigo patients; Biomedical engineering; Cameras; Charge coupled devices; Charge-coupled image sensors; Clinical diagnosis; Educational institutions; Electrodes; Image analysis; Image processing; Phase detection;
Conference_Titel :
[Engineering in Medicine and Biology, 1999. 21st Annual Conference and the 1999 Annual Fall Meetring of the Biomedical Engineering Society] BMES/EMBS Conference, 1999. Proceedings of the First Joint
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-5674-8
DOI :
10.1109/IEMBS.1999.804253
