耳鼻咽喉科領域の新しいX線撮影法の開発に関する研究

概要

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We developed a newly otological method of a panoramic tomography. The essential advantage of this method over the conventional radiographic techniques is that it is possible to radiograph both temporal bones and sinuses under identical conditions with one exposure.The x-ray beam sourse has a 2mm. slit beam which moves horizontally from right to left or vice versa circularly. The traget film distance in this method is 65mm., the amplitude of the circular axis is 220 degrees and the image layer is approximately 20mm. thick in the desired resion. By moving the x-ray machine center backward 30 to 50mm. from the base line, both temporal bones and sinuses can be taken simultaneously. Radiation dose measurements using the phantom indicate 45.7mR to the left, 32.3mR to the right, those are approximately as the same as those of the conventional postero-anterior view.
社団法人日本耳鼻咽喉科学会の論文