Neil G Simon1,2, Jim Lagopoulos2, Thomas Gallagher3, Michel Kliot4, Matthew C Kiernan2. 1. Prince of Wales Clinical School, University of New South Wales, Australia. 2. Brain and Mind Research Institute, University of Sydney, Australia. 3. Department of Radiology, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA. 4. Department of Neurosurgery, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA.
Abstract
PURPOSE: To determine the reliability and reproducibility of peripheral nerve diffusion tensor imaging (DTI) in healthy subjects. MATERIALS AND METHODS: We assessed the test-retest and interrater reliability studies of peripheral nerve DTI in a cohort of 12 healthy subjects (mean age 44.0 years, range 26-71 years). Magnetic resonance imaging (MRI) studies were performed on a 3T scanner (MR750, GE Healthcare). DTI and T1 -weighted sequences were performed on the tibial and peroneal nerves in the knee. Each subject was scanned on three separate occasions. Image analyses were performed at two anatomic positions: the level of the lateral femoral condyle (position 1), and the superior pole of the patella (position 2). Analysis was performed using three software packages ("raters"): FuncTools, FSL, and Diffusion Toolkit. Metrics obtained included fractional anisotropy (FA), axial diffusivity (AD), and radial diffusivity (RD). RESULTS: DTI metrics were not significantly different between each measurement position, except peroneal nerve AD and tibial nerve RD were higher at position 1 (P = 0.02 and 0.04, respectively). There was no significant difference in DTI metrics between male and female subjects (P = 0.10-0.99). The test-retest reliability of DTI metrics was high, maximal for FA (intraclass correlation coefficient [ICC] = 0.96). ICC values for individual DTI metrics were similar between each measurement position, except that tibial nerve AD was significantly higher at position 2 (P = 0.03). Interrater reliability was also high (ICC = 0.95-0.96). CONCLUSION: We found peripheral nerve DTI to be reliable and reproducible, with few effects related to the postprocessing package used.
PURPOSE: To determine the reliability and reproducibility of peripheral nerve diffusion tensor imaging (DTI) in healthy subjects. MATERIALS AND METHODS: We assessed the test-retest and interrater reliability studies of peripheral nerve DTI in a cohort of 12 healthy subjects (mean age 44.0 years, range 26-71 years). Magnetic resonance imaging (MRI) studies were performed on a 3T scanner (MR750, GE Healthcare). DTI and T1 -weighted sequences were performed on the tibial and peroneal nerves in the knee. Each subject was scanned on three separate occasions. Image analyses were performed at two anatomic positions: the level of the lateral femoral condyle (position 1), and the superior pole of the patella (position 2). Analysis was performed using three software packages ("raters"): FuncTools, FSL, and Diffusion Toolkit. Metrics obtained included fractional anisotropy (FA), axial diffusivity (AD), and radial diffusivity (RD). RESULTS: DTI metrics were not significantly different between each measurement position, except peroneal nerve AD and tibial nerve RD were higher at position 1 (P = 0.02 and 0.04, respectively). There was no significant difference in DTI metrics between male and female subjects (P = 0.10-0.99). The test-retest reliability of DTI metrics was high, maximal for FA (intraclass correlation coefficient [ICC] = 0.96). ICC values for individual DTI metrics were similar between each measurement position, except that tibial nerve AD was significantly higher at position 2 (P = 0.03). Interrater reliability was also high (ICC = 0.95-0.96). CONCLUSION: We found peripheral nerve DTI to be reliable and reproducible, with few effects related to the postprocessing package used.
Authors: Neil G Simon; Jim Lagopoulos; Sita Paling; Casey Pfluger; Susanna B Park; James Howells; Thomas Gallagher; Michel Kliot; Robert D Henderson; Steve Vucic; Matthew C Kiernan Journal: J Neurol Date: 2017-03-06 Impact factor: 4.849
Authors: Matthew T Flavin; Marek A Paul; Alexander S Lim; Charles A Lissandrello; Robert Ajemian; Samuel J Lin; Jongyoon Han Journal: Proc Natl Acad Sci U S A Date: 2022-06-02 Impact factor: 12.779
Authors: Barbara Cervantes; Anh T Van; Dominik Weidlich; Hendrick Kooijman; Andreas Hock; Ernst J Rummeny; Alexandra Gersing; Jan S Kirschke; Dimitrios C Karampinos Journal: Magn Reson Med Date: 2018-01-29 Impact factor: 4.668