Chest MRI Using Multivane-XD,a Novel T2-Weighted Free Breathing MR Sequence |
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| Authors: | Savinay Kapur Manisha Jana Lalit Gupta Ashu S Bhalla Priyanka Naranje Arun K Gupta |
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| Institution: | 1. Department of Radiology, University of Florida College of Medicine, Gainesville, FL;2. Department of Radiology, Pontificia Universidade Catolica do Rio Grande do Sul, Porto Alegre, Brazil;3. Department of Radiology, Hospital Moinhos de Vento, Porto Alegre, Brazil;1. Department of Radiology, NYU Winthrop Hospital, Mineola, NY;2. Stony Brook School of Medicine, Stony Brook, NY;3. Department of Radiology, University of Rochester School of Medicine, Rochester, NY;4. Department of Radiology, Einstein Healthcare Network, Philadelphia, PA;5. Department of Radiology, Albany Medical Center, Albany, NY;6. Department of Radiology, University of Alabama at Birmingham, Birmingham, AL;1. Department of Radiodiagnosis, Vardhaman Mahavir Medical College and Safdarjung Hospital, New Delhi, India;2. Department of Radiodiagnosis, All India Institute of Medical Sciences, New Delhi, India;1. Department of Radiology, Hospital of the University of Pennsylvania, Philadelphia, PA;2. Department of Biostatistics and Epidemiology, University of Pennsylvania, Philadelphia, PA |
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| Abstract: | ObjectiveTo compare image quality of free-breathing T2-weighted MultiVane-XD (MVXD) sequence (non-Cartesian k-space filling using radial rectangular blades) with conventional MR sequences (short tau inversion recovery STIR],balanced true field echo BTFE], T1 in phase fast field echo T1 FFE], and T1-fat saturated postgadolinium T1PG]) in MR imaging of chest.Materials and MethodsTwenty-one patients (10 men and 11 women) underwent chest MRI including T2W MVXD, STIR, BTFE (18/21), T1 FFE, T1PG (10/21) sequences at 1.5 T. Two reviewers (A.S.B and M.J. with 20 and 10 years of experience in pulmonary imaging, respectively) evaluated each sequence with respect to overall image quality, image sharpness, definition of mediastinal vessels including the aorta, pulmonary arteries, superior vena cava, intrapulmonary vessels; trachea, main bronchi, intrapulmonary airways; lung-mediastinal interface, pulmonary lesion detection, and artefacts in the upper, middle, and lower third of chest using 5-point scales. No sedation was given. Pairwise comparisons between T2W MVXD and the 4 conventional sequences were made using unpaired student's t test.ResultsMean age of patients was 30.67 years (range: 6-60 years). T2 MVXD showed significantly better overall image quality and sharpness than STIR, T1 FFE, and T1PG (P < 0.01) while it was comparable to BTFE. Mediastinal vessels were significantly better visualized on T2 MVXD as compared to STIR and T1 (P < 0.003). However, BTFE and T1PG were superior to T2 MVXD for visualization of great vessels, SVC, and intrapulmonary vessels (P < 0.01). Visualization of trachea, major bronchi, intrapulmonary airways as well as intrapulmonary lesion detection was significantly better on T2 MVXD images in comparison to any of the other 4 sequences (P < 0.03). Intrapulmonary artifacts were significantly lesser in BTFE images as compared to T2 MVXD (P < 0.01). No significant difference was found between the severity of intrapulmonary artifacts in other MR sequences as compared to T2 MVXD.ConclusionsBy virtue of its better overall image quality, sharpness, superior visualization of mediastinal airways, and lesion detection, T2 MultiVane-XD promises to be a robust addition in the armamentarium of thoracic radiologists. |
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