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Liu S, Zhang Y, Liu W, Yin T, Yuan J, Ran J, Li X. Simultaneous multi-slice technique for reducing acquisition times in diffusion tensor imaging of the knee: a feasibility study. Skeletal Radiol 2024:10.1007/s00256-024-04719-y. [PMID: 38913177 DOI: 10.1007/s00256-024-04719-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/19/2024] [Revised: 05/30/2024] [Accepted: 05/30/2024] [Indexed: 06/25/2024]
Abstract
OBJECTIVES To explore the feasibility of simultaneous multi-slice (SMS) technique for reducing acquisition times in readout-segmented echo planar imaging (RESOLVE) for diffusion tensor imaging (DTI) of the knee. MATERIALS AND METHODS A total of 30 healthy volunteers and 23 patients with knee acute injury (12 cases with anterior ligament (ACL) tears and 16 cases with patellar cartilage (PC) injury) were enrolled in this prospective study. Three DTI protocols were used: conventional RESOLVE-DTI with 12 directions (protocol 1), SMS-RESOLVE-DTI with 12 directions (protocol 2) and 20 directions (protocol 3). DTI parameters of gastrocnemius, ACL and posterior cruciate ligament (PCL), and PC from three protocols were quantitatively assessed. RESULTS For volunteers, protocol 2 significantly reduced acquisition time by 38.6% and 34.2% compared to protocols 1 and 3 while maintaining similar high-quality images and similar diffusive parameters, except for the fractional anisotropy (FA) and axial diffusivity (AD) of the PC between protocols 2 and 1 (P < 0.05). For injured ACL and PC, protocols 1 and 2 showed similar accurate diffusive parameters (except for AD, P = 0.025) and similar diagnostic efficacy, which demonstrated significantly lower FA and higher radial diffusivity (RD) in protocols 1 and 2 compared to volunteers (P < 0.05). CONCLUSIONS The 12-direction SMS-RESOLVE-DTI demonstrated a favorable balance between acquisition time and image quality, making it a promising alternative to conventional DTI for evaluating ligament and cartilage injuries. ADVANCES IN KNOWLEDGE The SMS technique greatly reduces acquisition time while maintaining image quality, which signified the possibility of DTI's clinical application.
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Affiliation(s)
- Simin Liu
- Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, No.1095, Jiefang Road, Wuhan, Hubei Province, China
| | - Yao Zhang
- Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, No.1095, Jiefang Road, Wuhan, Hubei Province, China
| | - Wei Liu
- MR Application Development, Siemens Shenzhen Magnetic Resonance Ltd., No. 32 Gaoxin C. Ave., 2nd, Shenzhen, China
| | - Ting Yin
- MR Collaborations, Siemens Healthineers Ltd., Chengdu, China
| | - Jie Yuan
- Department of Radiology, Zhongxiang People's Hospital, Zhongxiang City, China
| | - Jun Ran
- Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, No.1095, Jiefang Road, Wuhan, Hubei Province, China.
| | - Xiaoming Li
- Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, No.1095, Jiefang Road, Wuhan, Hubei Province, China.
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Bouyagoub S, Dowell NG, Gabel M, Cercignani M. Comparing multiband and singleband EPI in NODDI at 3 T: what are the implications for reproducibility and study sample sizes? MAGNETIC RESONANCE MATERIALS IN PHYSICS BIOLOGY AND MEDICINE 2020; 34:499-511. [PMID: 33315165 PMCID: PMC8338814 DOI: 10.1007/s10334-020-00897-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 10/29/2020] [Accepted: 11/13/2020] [Indexed: 11/16/2022]
Abstract
Objective The reproducibility of Neurite orientation dispersion and density imaging (NODDI) metrics from time-saving multiband (MB) EPI compared with singleband (SB) has not been considered. This study aims to evaluate the reproducibility of NODDI parameters from SB and MB acquisitions, determine the agreement between acquisitions and estimate the sample sizes required to detect between-group change. Methods Brain diffusion MRI data were acquired using SB and MB (acceleration factors 2 (MB2) and 3 (MB3)) on 8 healthy subjects on 2 separate visits. NODDI maps of isotropic volume fraction (FISO), neurite density (NDI) and orientation dispersion index (ODI) were estimated. Region-of-interest analysis was performed; variability across subjects and visits was measured using coefficients of variation (CoV). Intraclass correlation coefficient and Bland–Altman analysis were performed to assess reproducibility and detect any systematic bias between SB, MB2 and MB3. Power calculations were used to determine sample sizes required to detect group differences. Results Both NDI and ODI were reproducible between visits; however, FISO was variable. All parameters were not reproducible across methods; a systematic bias was observed with the derived values decreasing as the MB factor increases. The number of subjects needed to detect a between-group change is not significantly different between methods; however, ODI needs considerably higher sample sizes than NDI. Conclusions Both SB and MB yield highly reproducible NDI and ODI measures, but direct comparison of these parameters between methods is complicated by systematic differences that exist between the two approaches. Supplementary Information The online version contains supplementary material available at 10.1007/s10334-020-00897-7.
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Affiliation(s)
- Samira Bouyagoub
- Clinical Imaging Sciences Centre, Department of Neuroscience, Brighton and Sussex Medical School, University of Sussex, Falmer, Brighton, BN1 9RR, UK.
| | - Nicholas G Dowell
- Clinical Imaging Sciences Centre, Department of Neuroscience, Brighton and Sussex Medical School, University of Sussex, Falmer, Brighton, BN1 9RR, UK
| | - Matt Gabel
- Clinical Imaging Sciences Centre, Department of Neuroscience, Brighton and Sussex Medical School, University of Sussex, Falmer, Brighton, BN1 9RR, UK
| | - Mara Cercignani
- Clinical Imaging Sciences Centre, Department of Neuroscience, Brighton and Sussex Medical School, University of Sussex, Falmer, Brighton, BN1 9RR, UK.,Neuroimaging Laboratory, Santa Lucia Foundation, Via Ardeatina 306, 00179, Rome, Italy
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Koh YH, Shih YC, Lim SL, Kiew YS, Lim EW, Ng SM, Ooi LQR, Tan WQ, Chung YC, Rumpel H, Tan EK, Chan LL. Evaluation of trigeminal nerve tractography using two-fold-accelerated simultaneous multi-slice readout-segmented echo planar diffusion tensor imaging. Eur Radiol 2020; 31:640-649. [PMID: 32870393 DOI: 10.1007/s00330-020-07193-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Revised: 06/18/2020] [Accepted: 08/13/2020] [Indexed: 11/25/2022]
Abstract
OBJECTIVES Simultaneous multi-slice (SMS) imaging with short repetition time (TR) accelerates diffusion tensor imaging (DTI) acquisitions. However, its impact when combined with readout-segmented echo planar imaging (RESOLVE) on the cranial nerves given the challenging skull base/posterior fossa terrain is unexplored. We evaluated the reliability of trigeminal nerve DTI metrics using SMS with RESOLVE-DTI. METHODS Eight healthy controls and six patients with unilateral trigeminal neuralgia (TN) underwent brain MRI scan. Three different RESOLVE-DTI protocols were performed on a 3-T MRI system: non-SMS (TR = 4330 ms), SMS with identical TR (4330 ms), and SMS with short TR (2400 ms). Pontine signal-to-noise ratio (SNR) and DTI metrics of the trigeminal nerve streamlines tracked by two independent raters using deterministic tractography and standardized tracking protocol were obtained. These were statistically analyzed and compared across the three protocols using intra-rater and inter-rater intraclass correlation coefficients (ICCs), one-way analysis of variance (ANOVA), post hoc analysis, and linear regression. RESULTS On visual screening, there were no artifacts across the trigeminal nerves. All data also cleared objective image quality assurance analysis. Pontine SNR was similar for the two SMS protocols and higher for the non-SMS RESOLVE-DTI (F(2,36) = 4.40, p = 0.02). Intra-rater and inter-rater ICCs were very good (> 0.85). Trigeminal nerve DTI metrics were consistently measured by the three protocols, revealing significant linear relationships between non-SMS- and SMS-derived DTI metrics. CONCLUSION SMS RESOLVE-DTI enables fast and reliable evaluation of microstructural integrity of the trigeminal nerve, with potential application in the clinical management of TN. KEY POINTS • Readout-segmented diffusion-weighted echo planar imaging (RESOLVE-DTI) reduces image distortion artifacts in the posterior fossa but its long acquisition time limits clinical utility. • Simultaneous multi-slice (SMS) imaging combined with RESOLVE-DTI provides reliable trigeminal nerve tractography with potential applications in trigeminal neuralgia. • Two-fold-accelerated RESOLVE-DTI yields comparable trigeminal nerve streamlines and DTI metrics while near-halving acquisition time.
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Affiliation(s)
- Yeow Hoay Koh
- Department of Neurology, National Neuroscience Institute - Outram Campus, 20 College Road, Singapore, 169856, Singapore
| | - Yao-Chia Shih
- Department of Diagnostic Radiology, Singapore General Hospital, Outram Rd, Singapore, 169608, Singapore.,Duke-NUS Medical School, 8 College Rd, Singapore, 169857, Singapore
| | - Soo Lee Lim
- Department of Diagnostic Radiology, Singapore General Hospital, Outram Rd, Singapore, 169608, Singapore
| | - Yen San Kiew
- Department of Diagnostic Radiology, Singapore General Hospital, Outram Rd, Singapore, 169608, Singapore
| | - Ee Wei Lim
- Department of Neurology, National Neuroscience Institute - Outram Campus, 20 College Road, Singapore, 169856, Singapore
| | - See Mui Ng
- Department of Diagnostic Radiology, Singapore General Hospital, Outram Rd, Singapore, 169608, Singapore
| | - Leon Qi Rong Ooi
- Department of Neurology, National Neuroscience Institute - Outram Campus, 20 College Road, Singapore, 169856, Singapore
| | - Wen Qi Tan
- Department of Diagnostic Radiology, Singapore General Hospital, Outram Rd, Singapore, 169608, Singapore.,Duke-NUS Medical School, 8 College Rd, Singapore, 169857, Singapore
| | - Yiu-Cho Chung
- Siemens Healthcare, 60 MacPherson Rd, Singapore, 348615, Singapore
| | - Helmut Rumpel
- Department of Diagnostic Radiology, Singapore General Hospital, Outram Rd, Singapore, 169608, Singapore
| | - Eng King Tan
- Department of Neurology, National Neuroscience Institute - Outram Campus, 20 College Road, Singapore, 169856, Singapore.,Duke-NUS Medical School, 8 College Rd, Singapore, 169857, Singapore
| | - Ling Ling Chan
- Department of Diagnostic Radiology, Singapore General Hospital, Outram Rd, Singapore, 169608, Singapore. .,Duke-NUS Medical School, 8 College Rd, Singapore, 169857, Singapore.
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