Razmus T F, Glass B J, McDavid W D
Department of Dental Diagnostic Sciences, Indiana University School of Dentistry, Indianapolis.
Oral Surg Oral Med Oral Pathol. 1989 Jan;67(1):102-8. doi: 10.1016/0030-4220(89)90311-3.
The central plane of the image layer was located in several panoramic machines of the same manufacturer by making radiographs of a spherical test object placed in different positions. A round image indicated that the test object was at the central plane. The inconsistency of the location of the central plane in machines tested indicates the need for establishing a quality assurance test to verify image-layer location before patient exposure.
通过对放置在不同位置的球形测试物体进行射线照相，在同一制造商生产的几台全景机中确定图像层的中心平面。圆形图像表明测试物体位于中心平面。所测试机器中中心平面位置的不一致表明需要建立质量保证测试，以便在患者曝光前验证图像层的位置。
