Kalmar "skiagram" tsohuwar kalma ce don hoton rediyo ko hoton X-ray. Ya fito daga kalmomin Helenanci "skia" ma'ana "inuwa" da "graphē" ma'ana "rubutu" ko "zane." An saba amfani da kalmar a farkon kwanakin rediyo kuma har yanzu ana amfani da ita a wasu lokuta a cikin adabin likitanci, amma an maye gurbinsa da kalmar “X-ray.”
