Shortening MR Image Acquisition Time for Volumetric Interpolated Breath-hold Examination with a Recently Developed Parallel Imaging Reconstruction Technique: Clinical Feasibility
| Autor: | Bernard J. Ransil, Martina M. Morrin, Neil M. Rofsky, Daniel K. Sodickson, Ernest N. Yeh, Ivan Pedrosa, Charles A. McKenzie, Daniel Lim |
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| Rok vydání: | 2004 |
| Předmět: |
Adult
Male Time Factors Image quality Image Interpretation Computer-Assisted Humans Medicine Radiology Nuclear Medicine and imaging Mathematical Computing Aged Liver imaging Analysis of Variance medicine.diagnostic_test business.industry Liver Diseases Liver Neoplasms Reproducibility of Results k-space Magnetic resonance imaging Middle Aged Magnetic Resonance Imaging Liver Breathing Female Acquisition time Mr images Parallel imaging Artifacts business Nuclear medicine |
| Zdroj: | Radiology. 230:589-594 |
| ISSN: | 1527-1315 0033-8419 |
| Popis: | A recently developed parallel magnetic resonance (MR) imaging technique, parallel imaging with an augmented radius in k space, was used to accelerate the volumetric interpolated breath-hold examination (VIBE) performed in 20 patients referred for clinical liver imaging. Nonaccelerated MR images were also acquired in these patients. A five-point scale was used to score the quality of the images. The acceleration resulted in reduced image quality: The nonaccelerated images had a significantly higher (P.05) mean score--3.8 +/- 0.3 (SD), indicating good quality--than the accelerated images--3.0 +/- 0.3, indicating acceptable quality. However, for three patients who could not hold their breath for the duration necessary for nonaccelerated imaging, less severe breathing artifacts on the accelerated images resulted in improved quality compared with the quality of the nonaccelerated images. Parallel MR imaging-accelerated VIBE may be beneficial for patients who have difficulty sustaining a breath hold for the duration necessary to perform nonaccelerated imaging. |
| Databáze: | OpenAIRE |
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