而硫酸钡（Barium sulfate），其实它早在 1904 年就被用于胃肠道成像，是一种白色无味的结晶物质，能很好地吸收 X 射线，在胃肠道造影中表现出色，可在泪道成像方面，之前只有在兽医领域有过 ...
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