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100 User Manual(v01
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21
F= Focal spot (0.6 mm)
[Extra-focal radiation area: The geometry of the X-ray beam aligner in front of the tube tank is
designed so that the end of the cone edge from the X-ray focus is aligned in almost straight line to
reduce extra-focal radiation. Therefore, the area of extra focal radiation over the X-ray field(W2),
occurring at a distance of 650 mm from the focal spot, is 2 mm.]
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