Combination of compressed sensing and parallel imaging for T2-weighted imaging of the oral cavity in healthy volunteers: comparison with parallel imaging
| Autor: | Atsuko Fujikawa, Yasuyuki Kobayashi, Yoshiko Kurihara, Hirofumi Fukuchi, Hayato Tomita, Yuki Deguchi, Hidefumi Mimura, Kaoru Kitsukawa |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
medicine.medical_specialty
Image quality media_common.quotation_subject Oral cavity 030218 nuclear medicine & medical imaging 03 medical and health sciences Imaging Three-Dimensional 0302 clinical medicine Healthy volunteers medicine Humans Contrast (vision) Radiology Nuclear Medicine and imaging Neuroradiology media_common Mouth medicine.diagnostic_test business.industry Ultrasound Magnetic resonance imaging General Medicine Magnetic Resonance Imaging Healthy Volunteers Compressed sensing 030220 oncology & carcinogenesis Radiology Artifacts business Nuclear medicine |
| Zdroj: | European Radiology. 31:6305-6311 |
| ISSN: | 1432-1084 0938-7994 |
| Popis: | Compressed sensing (CS) and parallel imaging (PI) are magnetic resonance (MR) imaging acceleration techniques. Image quality of two-dimensional fast spin echo imaging of the oral cavity using CS or combined CS and PI has not been evaluated. The aim of this study was to compare the acquisition time and image quality between T2-weighted imaging (T2WI) with CS and PI (CSPI-T2WI) and T2WI with PI (PI-T2WI) of the oral cavity. Twenty healthy volunteers who underwent CSPI-T2WI and PI-T2WI of the oral cavity on a 3 T MR scanner were enrolled in the study. Contrast ratios of fat/muscle and bone/muscle on CSPI-T2WI and PI-T2WI were measured. Overall image quality, 4 kinds of artifacts, and visualization of 18 anatomical structures were independently evaluated by two radiologists with grading scales. The quantitative and qualitative measurements were compared between CSPI-T2WI and PI-T2WI by using the Wilcoxon signed-rank test. Mean acquisition time of CSPI-T2WI and PI-T2WI was 72 s and 136 s, respectively (p < .001). CSPI-T2WI showed a significantly higher contrast ratio of fat/muscle than PI-T2WI (p < .01). There were no significant differences in the overall image quality, artifacts, and visualization of anatomical structures between CSPI-T2WI and PI-T2WI. CSPI-T2WI of the oral cavity in healthy volunteers can provide a reduction in acquisition time without impaired image quality compared to PI-T2WI. • The acquisition time of T2WI with the combined CS and PI provided a 47% reduction in acquisition time compared with T2WI with PI. • T2WI with the combined CS and PI did not show impaired image quality compared with T2WI with PI. • Combined CS and PI can be a useful technology to evaluate the oral cavity with high-speed acquisition. |
| Databáze: | OpenAIRE |
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