ISSN 1004-4140
CN 11-3017/P
| Citation: |
NING X Y, HU L, FAN W L, et al. The Application Value of Monoenergetic Imaging on Dual-layer Spectral Detector Computed Tomography in Dacryocystography[J]. CT Theory and Applications, 2024, 33(6): 677-682. DOI: 10.15953/j.ctta.2024.144. (in Chinese).
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Objective: This study aimed to explore the value of monoenergetic imaging using dual-layer spectral detector computed tomography (CT) for dacryocystography. Methods: Dacryocystography was performed in patients with clinically suspected lacrimal duct obstruction using a Philips IQon dual-layer spectral detector CT. The objective evaluation included the signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) of each monoenergetic image, subjective rating of image quality, and the site and degree of lacrimal duct obstruction. Results: The SNR and CNR of 50 keV images was 9.76±13.44 and 10.24±13.88, respectively, which were significantly lower than that of 70~200 keV images. The subjective scores for 50 keV and conventional image quality were (5, 5) and (4, 5), respectively, indicating good consistency in subjective scores among radiologists. Conclusion: The SNR and CNR of CT dacryocystography increased significantly at 50 keV.
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