
Reduction of organ motion by combined cardiac gating and respiratory gating.
PURPOSE: To investigate whether the effect of organ motion can be further reduced with the application of a cardiac gating technique, together with respiratory gating. METHODS AND MATERIALS: Axial and coronal images through the heart and liver were continuously scanned with fast cine magnetic resonance imaging scans at three different gating settings: (1) without respiratory and cardiac gating; (2) with respiratory gating, but without cardiac gating; and (3) with both respiratory and cardiac gating. The effect of motion for either the heart or liver was analyzed with probability maps. RESULTS: With the application of respiratory gating only, the marginal region on the probability map was reduced by 10.0% in the axial slice and 19.8% in the coronal slice for the heart. It was reduced by 5.2% in the axial slice and 20.8% in the coronal slice for the liver. With the application of cardiac gating together with respiratory gating, the marginal region on the probability map was reduced further. The reduction was 8.0% in the axial slice and 13.6% in the coronal slice for the heart and 5.9% in the axial slice and 7.0% in the coronal slice for the liver. CONCLUSION: The effect of organ motion can be further reduced with the application of cardiac gating together with respiratory gating. The potential application to treatment planning merits further investigation.
Duke Scholars
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Related Subject Headings
- Respiration
- Oncology & Carcinogenesis
- Movement
- Magnetic Resonance Imaging, Cine
- Liver
- Humans
- Heart
- 5105 Medical and biological physics
- 3407 Theoretical and computational chemistry
- 3211 Oncology and carcinogenesis
Citation

Published In
DOI
ISSN
Publication Date
Volume
Issue
Start / End Page
Location
Related Subject Headings
- Respiration
- Oncology & Carcinogenesis
- Movement
- Magnetic Resonance Imaging, Cine
- Liver
- Humans
- Heart
- 5105 Medical and biological physics
- 3407 Theoretical and computational chemistry
- 3211 Oncology and carcinogenesis