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With the recent emergence of helical scan CT, which is used widely in the clinical field, it has become easy to create three-dimensional reconstruction images of the living body. With the emergence of multislice helical CT, which enables 0. 5 mm slice-thickness images, it has become possible to create threedimensional images of intricate structures. However, it is known that with three-dimensional reconstruction imaging, the images depicted change according to the image conditions, reconstruction function, and CT value set at the time of image depiction. In particular, the structure of the temporal bone is extremely intricate and anatomically the morphology is complicated, so the effects of such conditions are significant. In the present study we examined how helical scan CT and multi-slice CT three-dimensional reconstruction images in the temporal region change according to changes in the CT threshold, and also assessed the value of diagnosis using the obtained images. We further investigated the three-dimensional image construction conditions most suitable to the temporal region, depicted the structures of the normal middle ear and inner ear under the obtained optimal conditions, and assessed the diagnostic values of the depicted auditory ossicle, vestibulo-cochlea, and semicircular canal. We then applied this to the clinical setting and examined the possibility of applying three-dimensional reconstruction images to the entire temporal region.

Possibility of Three-Dimensional Reconstruction Images in the Temporal Region