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Heel effect is a consequence of the focus line principle that the intensity of X ray radiation on the cathode side will be greater than the anode side. Related to the phenomenon of X ray emission, namely heel effect, the lumbar vertebrae object which is anatomically from cranial shrinks and enlarges until it reaches its maximum in the sacrum bone then shrinks to the apex of the coxygeus bone, on this examination it is necessary to consider the application of the anode heel effect theory. This study aims to determine whether or not there are differences in radiographic image information on the examination of lumbar vertebrae by applying and not applying the anode heel effect theory. Retrieving radiograph data is carried out with 5 research objects in the form of probands. The results of the radiograph are then measured using a densitometer to obtain a density value. To support the research data, questionnaires were conducted on 5 radiology specialists. Examination of the lumbar vertebra with the application of the anode heel effect theory produces different information on density, contrast, detail, and sharpness by not applying the anode heel effect theory.