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Demonstration of enhanced K ‐edge angiography using a cerium target x‐ray generator
Author(s) -
Sato Eiichi,
Tanaka Etsuro,
Mori Hidezo,
Kawai Toshiaki,
Ichimaru Toshio,
Sato Shigehiro,
Takayama Kazuyoshi,
Ido Hideaki
Publication year - 2004
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.1803433
Subject(s) - x ray , generator (circuit theory) , cerium , angiography , materials science , nuclear medicine , optics , physics , radiology , medicine , metallurgy , power (physics) , quantum mechanics
The cerium target x‐ray generator is useful in order to perform enhanced K ‐edge angiography using a cone beam because K ‐series characteristic x rays from the cerium target are absorbed effectively by iodine‐based contrast mediums. The x‐ray generator consists of a main controller, a unit with a Cockcroft‐Walton circuit and a fixed anode x‐ray tube, and a personal computer. The tube is a glass‐enclosed diode with a cerium target and a 0.5 − mm ‐thick beryllium window. The maximum tube voltage and current were 65 kV and 0.4 mA , respectively, and the focal‐spot sizes were 1.0 × 1.3 mm . Cerium K α lines were left using a barium sulfate filter, and the x‐ray intensity was 0.48 μ C / kg at 1.0 m from the source with a tube voltage of 60 kV , a current of 0.40 mA , and an exposure time of 1.0 s . Angiography was performed with a computed radiography system using iodine‐based microspheres. In coronary angiography of nonliving animals, we observed fine blood vessels of approximately 100 μ m with high contrasts.