Reduced iodinated contrast media for abdominal imaging by dual-layer spectral detector computed tomography for patients with kidney disease
| Autor: | Hiroo Kajihara, Jiro Nasu, Hiroko Takaoka, Ikuo Matsushita, Koji Ogasawara, Shutaro Atsuji, Shoji Morishita, Kazuhiro Katahira, Hirokazu Saito, Mitsuhiko Kitaoka, Kana Noda |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
lcsh:Medical physics. Medical radiology. Nuclear medicine
Gastrointestinal lcsh:R895-920 media_common.quotation_subject Contrast-induced nephropathy 030218 nuclear medicine & medical imaging 03 medical and health sciences 0302 clinical medicine medicine Contrast (vision) Ascending colon Radiology Nuclear Medicine and imaging media_common medicine.diagnostic_test business.industry Detector Transverse colon medicine.disease 030220 oncology & carcinogenesis Virtual monochromatic images Angiography Monochromatic color Nuclear medicine business Kidney disease |
| Zdroj: | Radiology Case Reports Radiology Case Reports, Vol 13, Iss 2, Pp 437-443 (2018) |
| ISSN: | 1930-0433 |
| Popis: | Contrast-enhanced computed tomography using iodinated contrast media is useful for diagnosis of gastrointestinal diseases. However, contrast-induced nephropathy remains problematic for kidney diseases patients. Although current guidelines recommended the use of a minimal dose of contrast media necessary to obtain adequate images for diagnosis, obtaining adequate images with sufficient contrast enhancement is difficult with conventional computed tomography using reduced contrast media. Dual-layer spectral detector computed tomography enables the simultaneous acquisition of low- and high-energy data and the reconstruction of virtual monochromatic images ranging from 40 to 200 keV, retrospectively. Low-energy virtual monochromatic images can enhance the contrast of images, thereby facilitating reduced contrast media. In case 1, abdominal computed tomography angiography at 50 keV using 40% of the conventional dose of contrast media revealed the artery that was the source of diverticular bleeding in the ascending colon. In case 2, ischemia of the transverse colon was diagnosed by contrast-enhanced computed tomography and iodine-selective imaging using 40% of the conventional dose of contrast media. In case 3, advanced esophagogastric junctional cancer was staged and preoperative abdominal computed tomography angiography could be obtained with 30% of the conventional dose of contrast media. However, the texture of virtual monochromatic images may be a limitation at low energy. Keywords: Virtual monochromatic images, Contrast-induced nephropathy |
| Databáze: | OpenAIRE |
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