Relationship between Quantitativeness of Iodine and Accuracy of Virtual Non-contrast Image in Dual-energy Computed Tomography
| Autor: | Katsunori Ono, Shingo Kayano, Shu Onodera, Kazuhiro Sato, Yumi Takane, Hirotaka Shimura, Ayaka Satomura, Hirokazu Takano |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
medicine.diagnostic_test
Lesion detection Computer science media_common.quotation_subject Contrast Media chemistry.chemical_element Computed tomography Dual-Energy Computed Tomography General Medicine Iodine 030218 nuclear medicine & medical imaging Image (mathematics) Radiography Dual-Energy Scanned Projection 03 medical and health sciences 0302 clinical medicine chemistry 030220 oncology & carcinogenesis medicine Contrast (vision) Monochromatic color Tomography X-Ray Computed Material decomposition Biomedical engineering media_common |
| Zdroj: | Japanese Journal of Radiological Technology. 75:247-253 |
| ISSN: | 1881-4883 0369-4305 |
| DOI: | 10.6009/jjrt.2019_jsrt_75.3.247 |
| Popis: | Dual-energy computed tomography (DE-CT) is the promising technology, such as enabling material decomposition, generation of the virtual monochromatic image, and measurement of effective atomic numbers. There are reports that utilization of the virtual non-contrast (VNC) image, the iodine map image, and the virtual monochromatic image can contribute to the improvement of lesion detection and its characterization, compared with conventional contrast CT by single-energy computed tomography (SE-CT). In addition, acquisition of the VNC images makes it possible to skip scanning of true non-contrast CT, which is also expected to reduce exposure. However, a reliable evaluation of the accuracy of the VNC image has not been established, and only a few reports have verified their accuracy. In this study, we evaluated the relationship between the quantitativeness of iodine and the CT value of VNC image. As a result of our study, when the iodine volume was overestimated, the CT value of the VNC image was lower than the reference value, and when the iodine volume was underestimated, the CT value was upper than the reference value. Moreover, we clarified that the CT value of the VNC image greatly diverges as the iodine volume increases. |
| Databáze: | OpenAIRE |
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