2001 Volume 13 Issue 2 Pages 68-74
In order to investigate the usefulness of three-dimensional CT images for assessment laryngeal cancer, we made multi-planar reconstruction (MPR) images and three-dimensional CT images using conventional helical CT and multi-slice CT, and conducted imaging diagnoses of the developmental range of the cancer. Comparisons between conventional helical CT images and multi-slice CT images and with large specimens of the extracted larynx are reported here.
(1) MPR images were useful for diagnosis of the developmental range of laryngeal cancer, and the findings were almost identical to the analyses of the large specimens. Coronary and sagittal section images were particulary useful for diagnosis of cancer development in the superior and inferior directions in the glottis. Axial section images were useful for diagnosis of infiltration into the thyroid cartilage and the development to the extra-larynx.
(2) Multi-slice CT images improved the ability of spatial resolution over that of conventional helical CT images, and displayed the developmental range of tumors more clearly. The CT time was shorter and MPR images could be extracted while vocalizing, breathing at rest, and holding breath. Dynamic evaluation was possible.
(3) Imaging-facilitated understanding of the developmental-range of a tumor three-dimensionally. Multi-slice CT images were especially superior in the quality and three-dimensional condition.
