| Autor: |
Yasuo, Takatsu, Masafumi, Nakamura, Takanobu, Yamashiro, Atsushi, Ikemoto, Satoshi, Sawa, Masanobu, Nakamura, Tosiaki, Miyati |
| Rok vydání: |
2020 |
| Předmět: |
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| Zdroj: |
Radiological physics and technology. 14(2) |
| ISSN: |
1865-0341 |
| Popis: |
To acquire reference data for setting an appropriate compressed sensitivity encoding (CS) for brain lesion detectability, the effects of contrast and noise on contrast-enhanced magnetic resonance imaging (MRI) were evaluated. Gadobutrol at various concentrations and manganese chloride tetrahydrate were used as a phantom. Various CS factors (0-10) and denoising levels (weak, medium, and strong) were assessed. The contrast amount decreased from CS7 in non-denoised images for 0.5-2 mmol/L solutions but slightly decreased from CS7 with denoising. The noise amount significantly increased with an increasing CS factor. Generally, there was a significant difference in the denoising level and rate across all CS factors in the case of the 2 and 0 mmol/L solutions. When the CS factor was increased without denoising, the integrated noise power spectrum (NPS) increased and decreased in the high-frequency and low-frequency areas, respectively. These data can be used to establish settings based on the degree of denoising. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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