Principles of radiographic imaging

The erect position allows the diaphragm to decent freely during full inspiration. This enables a proficient X-ray hence preventing lordotic appearance.
Correct lateral head positioning has proven to be a challenge considering the fatigue patients undergo during X-ray. A tangle in the head position mobilizes a short cone minimizing the long cones hence limited resulting image. In order to ensure a correct vertical angulation of the head during X-ray, various lines must lie parallel to the tabletop (Adler & Carlton, 2012). According to Rothbart Proprioceptive Therapy, the Median Sagittal line, which serves the role of a vertical line must lie parallel to the tabletop. The spinal segment prevents lateral displacement ensuring a steady posture during the X-ray process.
Patients suffering from osteoporosis have painful experiences while sitting on the X-ray table. It is in this regard that positioning aids remain in use. To achieve an AP position, positioning aids such as radiolucent sponges and sandbags as well as mattress get applied (Adler & Carlton, 2012). The aids foresee a direct central ray perpendicular through the Patellofemoral joint hence leading to the success of an X-ray. Darrin is also used as an X-ray aid in an AP projection.