Title :
An avalanche-type high definition TV camera as a better detecting system for microangiography using monochromatic synchrotron radiation
Author :
Tanaka, Etsuro ; Sekka, Takafumi ; Tanaka, Yutaka ; Goto, Kenichiro ; Tobita, Kosuke ; Iwata, Yoshiro ; Ito, Kunihisa ; Mohammed, Minhaz U. ; Shinozaki, Yoshiro ; Abe, Sumihisa ; Hyodo, Kazuyuki ; Ando, Masami ; Tanioka, Kenkichi ; Kubota, Misao ; Umetani
Author_Institution :
Sch. of Med., Tokai Univ., Isehara, Japan
fDate :
31 Oct-3 Nov 1996
Abstract :
We compared an avalanche-type high definition TV camera (HD-TV) system and a conventional image-intensifier-TV camera (II-TV) system coupled to a fluorescent screen for microangiography using monochromatic synchrotron radiation. Nine anesthetized dogs were irradiated while iodine-contrast material was injected into the artery, and the images were detected with the HD-TV system or II-TV system. Both systems visualized small arteries (vasa recta) in the small intestine. Vascular narrowing as branching in vasa recta and their submucosal communications were clearly demonstrated in the HD-TV system, but not in the II-TV system. Spatial resolution determined with a resolution bar chart was 30 μm in the HD-TV system, whereas 170 μm or more in the II-TV system. The HD-TV system produces a fine microvascular angiogram without losing sensitivity and is useful for evaluating microcirculatory disorders
Keywords :
biomedical equipment; diagnostic radiography; fluorescent screens; haemodynamics; high definition television; image resolution; synchrotron radiation; television applications; television cameras; anesthetized dogs; artery; avalanche-type high definition TV camera; conventional image-intensifier-TV camera; detecting system; fine microvascular angiogram; fluorescent screen; iodine-contrast material; microangiography; microcirculatory disorders; monochromatic synchrotron radiation; resolution bar chart; sensitivity and; small arteries; small intestine; spatial resolution; submucosal communications; vasa recta; vascular narrowing; Arteries; Cameras; Dogs; Fluorescence; HDTV; Intestines; Spatial resolution; Synchrotron radiation; TV; Visualization;
Conference_Titel :
Engineering in Medicine and Biology Society, 1996. Bridging Disciplines for Biomedicine. Proceedings of the 18th Annual International Conference of the IEEE
Conference_Location :
Amsterdam
Print_ISBN :
0-7803-3811-1
DOI :
10.1109/IEMBS.1996.646518
