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- Titel:
Characterizing radial undersampling artifacts for cardiac applications.
- Dokumenttyp:
- Journal Article; Research Support, Non-U.S. Gov't; Article
- Autor(en):
- Peters, DC; Rohatgi, P; Botnar, RM; Yeon, SB; Kissinger, KV; Manning, WJ
- Abstract:
- The undersampled radial acquisition has been widely employed for accelerated (by a factor R = N(r)/N(p)) cardiac imaging, but the resulting reduction in image quality has not been well characterized. This investigation presents a method of measuring these artifacts through synthetic undersampling of high SNR images (SNR > or = 30). After validating the method in phantoms, the method was applied to a study of short-axis, long-axis, and coronary MRI imaging in healthy subjects. For 60 projections (60 N(p)), the total artifact is approximately 10% for short and long-axis imaging (R = 2.1) and approximately 15% for coronary MRI (R = 3.7). For 60 N(p), the SD of artifact in the region of the heart is 2% for short- and long-axis imaging (R = 2.1) and 3.5% for coronary MRI (R = 3.7). The artifact content is less in the region of the heart than in the periphery. The artifact is very reproducible among subjects for standard views. A study of coronary MRI at progressively fewer projections (at constant scan time) showed that right coronary MRI images were acceptable if total artifact was <6.5% of image content (N(p) > 120, R = 2.1).
- Zeitschriftentitel:
- Magn Reson Med
- Jahr:
- 2006
- Band / Volume:
- 55
- Heft / Issue:
- 2
- Seitenangaben Beitrag:
- 396-403
- Sprache:
- eng
- Volltext / DOI:
- doi:10.1002/mrm.20782
- PubMed:
- http://view.ncbi.nlm.nih.gov/pubmed/16408266
- Print-ISSN:
- 0740-3194
- TUM Einrichtung:
- Klinik und Poliklinik für Nuklearmedizin
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