Relationship between the pixel value in digital subtraction angiography and iodine concentration: study in high iodine concentration with original phantom
| Autor: | Masatoshi Sasaki, Haruo Saito, Kei Takase, Masayuki Zuguchi, Koichi Chida, Tokutaro Sato, Masahiro Sai |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2000 |
| Předmět: |
Contrast Media
chemistry.chemical_element Image processing Iodine General Biochemistry Genetics and Molecular Biology Imaging phantom Image Processing Computer-Assisted medicine Animals Humans Angiocardiography medicine.diagnostic_test Phantoms Imaging business.industry Angiography Angiography Digital Subtraction General Medicine Digital subtraction angiography body regions Contrast medium chemistry Nuclear medicine business Densitometry |
| Zdroj: | Tohoku Journal of Experimental Medicine. 190(3):169-176 |
| ISSN: | 0040-8727 |
| Popis: | Quantitative digital subtraction angiography (DSA) image analysis based on densitometry is widely accepted and used. For the densitometoric DSA image analysis, it is required that there is a linear relationships between the pixel values on DSA images (DSA values) and contrast medium iodine concentration or the thickness of the vessels or the chambers filled with contrast material. We studied on relationship between the DSA value and iodine concentration especially in high iodine concentration. As for the relationship between DSA values and iodine concentration on the DSA images at low concentration, DSA phantom had a good linear relationship. However, the relationship at the high iodine concentration, DSA phantom sometimes lost this linear relationship. Our results suggested that it was necessary to identify relationship between DSA values and iodine concentration in each DSA system, especially in high iodine concentration setting, for densitometoric DSA image analysis. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|