Study of Image Quality(contrast) and Reduction of Patient Dose by Using Heavy Metal Filters
| Autor: | Ken-Ichi Yoshida, Taizou Sanada, Hiroko Nishimura, Yona Oishi, Hideyuki Iwanaga, Yuichi Sano, Akiyoshi Otsuka, Kazuo Fujimoto, Ken-ichiro Yasui |
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| Rok vydání: | 2002 |
| Předmět: |
Radiography
Abdominal Materials science Image quality Gadolinium media_common.quotation_subject chemistry.chemical_element Radiation Dosage Reduction (complexity) Holmium Radiation Protection Metals Heavy Humans Contrast (vision) Ytterbium media_common Lumbar Vertebrae business.industry General Medicine Filter (signal processing) Radiographic Image Enhancement chemistry Mockup Patient dose Nuclear medicine business Filtration |
| Zdroj: | Japanese Journal of Radiological Technology. 58:109-114 |
| ISSN: | 1881-4883 0369-4305 |
| Popis: | We studied image quality (contrast) and patient dose reduction using heavy metal filters in lumbar spine and abdomen x-ray examination. Heavy metal filters used in this study are gadolinium, holmium and ytterbium and these combinations. These filters have k-absorption edge in the range from 50 to 70 keV. Image quality and patient dose in 70-90 kV tube voltage with heavy metal filters were compared with 80 kV tube voltage without filter. Image quality was improved in four percent and patient dose could be reduced by 30%. However, tube loading increased from 1.6 to 2.2 times. It was found that the best filter choices gave better image and reduced patient dose compared to without filter. |
| Databáze: | OpenAIRE |
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