Quantitative Assessment and Ligament Traceability of Volume Isotropic Turbo Spin Echo Acquisition (VISTA) Ankle Magnetic Resonance Imaging: Fat Suppression versus without Fat Suppression.
10.13104/jksmrm.2013.17.2.110
- Author:
Kyung Eun CHO
1
;
Choon Sik YOON
;
Ho Taek SONG
;
Young Han LEE
;
Daekeon LIM
;
Jin Suck SUH
;
Sungjun KIM
Author Information
1. Department of Radiology, Gangnam Severance Hospital, Yonsei University, Seoul, Korea. agn70@yuhs.ac
- Publication Type:Original Article
- Keywords:
Magnetic resonance imaging (MRI);
Ankle;
3D isotropic imaging;
Fat suppression;
Ligaments
- MeSH:
Animals;
Ankle;
Bone Marrow;
Ligaments;
Magnetic Resonance Spectroscopy;
Magnetics;
Magnets;
Signal-To-Noise Ratio;
Tendons
- From:Journal of the Korean Society of Magnetic Resonance in Medicine
2013;17(2):110-122
- CountryRepublic of Korea
- Language:English
-
Abstract:
PURPOSE: To compare the image quality and ligament traceability in ankle images obtained using Volume Isotropic Turbo Spin Echo Acquisition (VISTA) MRI with and without fat suppression. MATERIALS AND METHODS: The signal-to-noise ratios (SNRs) in images from a phantom and from the ankle of a volunteer were compared. Ten ankles from 10 non-symptomatic volunteers were imaged for comparisons of contrast ratio (CR) and ligament traceability. All examinations were performed using VISTA sequences with and without fat suppression on a 3T MRI scanner. The SNRs were obtained from images with subjects and without subjects (noise-only). Contrast ratios from images of the 10 ankles were acquired between fluid and tendon (F-T), F-cartilage (C), F-ligament (L), fat (f)-T, f-C and f-L. Two musculoskeletal radiologists independently scored the traceability of 7 ligaments, in sagittal, axial and coronal images respectively, based on a 4-point scale (1 as not traceable through 4 as clearly traceable). The Wilcoxon signed-rank test was used to compare the CR. Fisher's exact test and Pearson's chi-squared test were used to compare the ligament traceability. RESULTS: The SNRs did not differ significantly between the two sequences except in bone marrow. VISTA SPAIR showed the higher CR only in F-T (p = 0.04), whereas VISTA showed higher CR in f-T (p = 0.005), f-C (p = 0.005) and f-L (p = 0.005). The calcaneofibular ligament traceability with VISTA was superior to that obtained with VISTA SPAIR (p < 0.05) in all planes. CONCLUSION: VISTA showed significant superiority to VISTA SPAIR in tracing CFL due to the superior CR between fat and ligament.
