K-space substitution: A novel dynamic imaging technique
| Autor: | Audun N. Øksendal, Peter A. Rinck, Richard A. Jones, Tomm B. Müller, Olav Haraldseth |
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| Rok vydání: | 1993 |
| Předmět: |
Computer science
business.industry Dynamic imaging Brain Contrast Media Pattern recognition k-space Image processing Iterative reconstruction Pentetic Acid Magnetic Resonance Imaging Signal Brain Ischemia Rats Sampling (signal processing) Dysprosium Image Processing Computer-Assisted Organometallic Compounds Animals Radiology Nuclear Medicine and imaging Spatial frequency Artificial intelligence business Nuclear medicine Dynamic method |
| Zdroj: | Magnetic Resonance in Medicine. 29:830-834 |
| ISSN: | 1522-2594 0740-3194 |
| Popis: | A rapid dynamic imaging sequence has been developed in which only the 32 phase encoding steps that encode low spatial frequencies are collected for each dynamic image. These are substituted into a previously acquired, 128 x 128 raw data set prior to image reconstruction. In this way the dynamic information is retained while the overall appearance is improved in comparison with images obtained by zero filling to 128 x 128, leading to better qualitative evaluation. The limited k-space sampling means that the technique is most effective for large homogeneous areas of signal change since fine changes in contrast are imperfectly recorded. |
| Databáze: | OpenAIRE |
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