Usefulness of Virtual Monochromatic Images and Iodine Maps Derived from Dual-Energy Computed Tomography for Diagnosing Deep Neck Abscesses
| Autor: | Zaw Aung Khant, Youhei Hattori, Hiroshi Nakada, Tetsuya Tono, Aya Kimura, Minako Azuma, Toshinori Hirai |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Adult
Male Iohexol chemistry.chemical_element Contrast Media Computed tomography Signal-To-Noise Ratio Iodine Radiography Dual-Energy Scanned Projection Young Adult medicine Humans Radiology Nuclear Medicine and imaging Abscess Aged Retrospective Studies medicine.diagnostic_test business.industry Neck abscess Dual-Energy Computed Tomography Middle Aged equipment and supplies medicine.disease Radiographic Image Enhancement chemistry Radiographic Image Interpretation Computer-Assisted Female Monochromatic color business Nuclear medicine Tomography X-Ray Computed Neck |
| Zdroj: | Journal of computer assisted tomography. 45(4) |
| ISSN: | 1532-3145 |
| Popis: | OBJECTIVE We aimed to determine whether dual-energy computed tomography (CT) is useful for evaluating deep neck abscesses. METHODS This study included 22 consecutive patients who were clinically suspected of having a deep neck abscess and underwent dual-energy CT. Conventional 120-kVp images, 70- and 40-keV virtual monochromatic images (VMIs), and iodine maps were inspected to calculate the contrast ratio of the abscess rim (AR) to the abscess center (AC) or to the adjacent muscle (M). The diagnostic certainty of abscesses was assessed on these images. RESULTS Twenty (91%) of 22 patients had a definitive diagnosis. The contrast ratio for AR/AC and AR/M was significantly higher on 40-keV VMIs and iodine maps than on 120-kVp images and 70-keV VMIs (P < 0.05). On both 40-keV VMIs and iodine maps, the diagnostic certainty of abscess improved in 3 (15%) cases compared with 120-kVp images and 70-keV VMIs. CONCLUSIONS Dual-energy CT-based 40-keV VMIs and iodine maps are useful for evaluating deep neck abscesses and may improve diagnostic certainty. |
| Databáze: | OpenAIRE |
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