The efficiency of the X-ray beam forming systems based on a planar X-ray waveguide and on a conventional slits superimposition is compared.
Composite tight gas reservoirs are distributed widely in anticline belts, deep depressions, and slope zones as a result of superimposition of conventional and deep tight gas reservoirs in deep basins, also including buoyancy-adjusted deep tight gas reservoirs reconstructed through subsequent fault or fracture development (e.g., subsequent inner-sag uplifting).
Also sexing and ageing is difficult to assess due to the partial destruction (and in some cases even crucial missing body parts) and the limited quality of conventional X-rays as well as the superimposition of embalming-related artifacts.
CBCT allows three dimensional assessment of the alveolar support of the incisors without the disadvantages of conventional two-dimensional radiography including image distortion and superimposition.
The use of conventional radiographs has inherent limitations such as structural superimpositions in two-dimensional imaging, particularly in the region of the petrous temporal bone, the mastoid process, and the articular eminence, which indeed limits an accurate view of the TMJ [6].
These conventional exams, however, present some limitations, related to their bi-dimensionality, to the superimposition of different anatomical structures on the same plane and to the radiographic projection, which is influenced by the patient's head position[3].
Since a urethral catheter is often present postoperatively, in the past conventional radiographic cystography was employed to visualize suspected bladder lacerations, with significant limitations related to obtaining an adequate distension and to superimposition of bowel and bony structures [2, 17].
Superimposition creates other mismatches.
Two superimposition experiments were unsuccessful.
Robert Rauschenberg also used montage and superimposition.
