Work in progress: the application of temporal filtering techniques to hybrid subtraction in digital subtraction angiography
| Autor: | Anne Lindsay Hall, Dieter R. Enzmann, Joseph K. Maier, William R. Brody, Stephen J. Riederer |
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| Rok vydání: | 1983 |
| Předmět: |
Astrophysics::High Energy Astrophysical Phenomena
media_common.quotation_subject Temporal subtraction Diatrizoate behavioral disciplines and activities Dogs medicine Animals Contrast (vision) Radiology Nuclear Medicine and imaging media_common Hybrid image medicine.diagnostic_test business.industry Matched filter digestive oral and skin physiology Angiography Subtraction Pattern recognition Digital subtraction angiography equipment and supplies Femoral Artery nervous system Temporal filtering Subtraction Technique Artificial intelligence Nuclear medicine business Filtration circulatory and respiratory physiology |
| Zdroj: | Radiology. 147:859-862 |
| ISSN: | 1527-1315 0033-8419 |
| DOI: | 10.1148/radiology.147.3.6342036 |
| Popis: | Temporal filtering methods were applied to iodine signal-to-noise ratio (SNR) restoration in intravenous hybrid subtraction digital subtraction angiography (DSA). For equal detected exposure rates hybrid subtraction had approximately 35% of the SNR of temporal subtraction. When matched filtering was applied to a DSA run, the filtered result had approximately two times higher SNR than the peak contrast image in the run. Thus, when matched filtering techniques were applied to the hybrid image sequence, the resultant SNR increased to about 70% of that of temporal subtraction. With an additional factor-of-two increase in exposure rate for the hybrid run, SNR parity with temporal subtraction could be achieved. This compared with a factor-of-nine increase in exposure that would be required if no filtering were performed. Experimental hybrid matched filter results, generated with intravenous canine DSA studies, supported the predictions in SNR performance. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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