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Where can you find pictures of a cross-sectional X-Ray image of the brain?
It is not. However, if there may be a 'secondary' tumor in the brain (something that has spread to the brain), it would be wise to start with a chest x-ray to look for the 'primary' tumor.
Because most X-rays pass through the skin and other body tissue, the X-ray strikes the photographic film beneath the area. unlike other body tissues, bones absorb X-rays