Final answer:
To achieve a thin simple linear tomograph, the movement of the object must be decreased. This method allows the focus on a specific plane within the body, ensuring that only structures in that focal plane appear sharp, thus reducing the slice thickness of the tomograph.
Step-by-step explanation:
To obtain a thin simple linear tomograph, the correct approach would be to decrease object movement. This is because tomography involves moving the x-ray source in one direction while the film moves in the opposite direction to maintain a focus on a particular plane within the body. By decreasing the movement of the object, only the structures in the focal plane appear sharp, with the rest of the structures blurred out, leading to a thinner image slice. Increasing x-ray intensity or exposure time would not directly contribute to the thinness of the image slice; these factors would more so affect the brightness and contrast of the image. Increasing angular movement would simply adjust the perspective rather than refine the slice thickness of the tomograph. Therefore, the answer is c. Decrease Object Movement to achieve a thin simple linear tomograph.