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Jerban S, Moazamian D, Mohammadi HS, Ma Y, Jang H, Namiranian B, Shin SH, Alenezi S, Shah SB, Chung CB, Chang EY, Du J. More accurate trabecular bone imaging using UTE MRI at the resonance frequency of fat. Bone 2024; 184:117096. [PMID: 38631596 DOI: 10.1016/j.bone.2024.117096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 03/18/2024] [Accepted: 04/08/2024] [Indexed: 04/19/2024]
Abstract
High-resolution magnetic resonance imaging (HR-MRI) has been increasingly used to assess the trabecular bone structure. High susceptibility at the marrow/bone interface may significantly reduce the marrow's apparent transverse relaxation time (T2*), overestimating trabecular bone thickness. Ultrashort echo time MRI (UTE-MRI) can minimize the signal loss caused by susceptibility-induced T2* shortening. However, UTE-MRI is sensitive to chemical shift artifacts, which manifest as spatial blurring and ringing artifacts partially due to non-Cartesian sampling. In this study, we proposed UTE-MRI at the resonance frequency of fat to minimize marrow-related chemical shift artifacts and the overestimation of trabecular thickness. Cubes of trabecular bone from six donors (75 ± 4 years old) were scanned using a 3 T clinical scanner at the resonance frequencies of fat and water, respectively, using 3D UTE sequences with five TEs (0.032, 1.1, 2.2, 3.3, and 4.4 ms) and a clinical 3D gradient echo (GRE) sequence at 0.2 × 0.2 × 0.4 mm3 voxel size. Trabecular bone thickness was measured in 30 regions of interest (ROIs) per sample. MRI results were compared with thicknesses obtained from micro-computed tomography (μCT) at 50 μm3 voxel size. Linear regression models were used to calculate the coefficient of determination between MRI- and μCT-based trabecular thickness. All MRI-based trabecular thicknesses showed significant correlations with μCT measurements. The correlations were higher (examined with paired Student's t-test, P < 0.01) for 3D UTE images performed at the fat frequency (R2 = 0.59-0.74, P < 0.01) than those at the water frequency (R2 = 0.18-0.52, P < 0.01) and clinical GRE images (R2 = 0.39-0.47, P < 0.01). Significantly reduced correlations were observed with longer TEs. This study highlighted the feasibility of UTE-MRI at the fat frequency for a more accurate assessment of trabecular bone thickness.
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Affiliation(s)
- Saeed Jerban
- Department of Radiology, University of California, San Diego, La Jolla, CA, USA.
| | - Dina Moazamian
- Department of Radiology, University of California, San Diego, La Jolla, CA, USA
| | | | - Yajun Ma
- Department of Radiology, University of California, San Diego, La Jolla, CA, USA
| | - Hyungseok Jang
- Department of Radiology, University of California, San Diego, La Jolla, CA, USA
| | - Behnam Namiranian
- Department of Radiology, University of California, San Diego, La Jolla, CA, USA
| | - Soo Hyun Shin
- Department of Radiology, University of California, San Diego, La Jolla, CA, USA
| | - Salem Alenezi
- Research and Laboratories Sector, Saudi Food and Drug Authority, Riyadh, Saudi Arabia
| | - Sameer B Shah
- Radiology Service, Veterans Affairs San Diego Healthcare System, San Diego, La Jolla, CA, USA; Orthopaedic Research, University of California, San Diego, La Jolla, CA, USA
| | - Christine B Chung
- Department of Radiology, University of California, San Diego, La Jolla, CA, USA; Radiology Service, Veterans Affairs San Diego Healthcare System, San Diego, La Jolla, CA, USA
| | - Eric Y Chang
- Department of Radiology, University of California, San Diego, La Jolla, CA, USA; Radiology Service, Veterans Affairs San Diego Healthcare System, San Diego, La Jolla, CA, USA
| | - Jiang Du
- Department of Radiology, University of California, San Diego, La Jolla, CA, USA; Radiology Service, Veterans Affairs San Diego Healthcare System, San Diego, La Jolla, CA, USA.
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Jerban S, Moazamian D, Ma Y, Afsahi AM, Dwek S, Athertya J, Malhi B, Jang H, Woods G, Chung CB, Du J, Chang EY. Fast dual-echo estimation of apparent long T2 fraction using ultrashort echo time magnetic resonance imaging in tibialis tendons and its osteoporosis-related differences in women. Quant Imaging Med Surg 2024; 14:3146-3156. [PMID: 38617168 PMCID: PMC11007502 DOI: 10.21037/qims-23-1341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Accepted: 01/09/2024] [Indexed: 04/16/2024]
Abstract
Background Tendon and bone comprise a critical interrelating unit. Bone loss, including that seen with osteopenia (OPe) or osteoporosis (OPo), may be associated with a reduction in tendon quality, though this remains incompletely investigated. Clinical magnetic resonance imaging (MRI) sequences cannot directly detect signals from tendons because of the very short T2. Clinical MRI may detect high-graded abnormalities by changes in the adjacent structures like bone. However, ultrashort echo time MRI (UTE-MRI) can capture high signals from all tendons. To determine if the long T2 fraction, as measured by a dual-echo UTE-MRI sequence, is a sensitive quantitative technique to the age- and bone-loss-related changes of the lower leg tendons. Methods This is a cross-sectional study conducted between January 2018 to February 2020 in the lower legs of 14 female patients with OPe [72±6 years old, body mass index (BMI) =25.8±6.2 kg/m2] and 31 female patients with OPo (73±6 years old, BMI=22.0±3.8 kg/m2), as well as 30 female subjects with normal bone (Normal, 35±18 years old, BMI =23.2±4.3 kg/m2), were imaged on a 3T clinical scanner using a dual-echo 3D Cones UTE sequence. We defined the apparent long T2 signal fraction (aFrac-LongT2) of tendons as the ratio between the signal at the second echo time (TE =2.2 ms) to the UTE signal. The average aFrac-LongT2 and the cross-sectional area were calculated for the anterior tibialis tendons (ATTs) and the posterior tibialis tendons (PTTs). The Kruskal-Wallis rank test was used to compare the differences in aFrac-LongT2 and the cross-sectional area of the tendons between the groups. Results The aFrac-LongT2 of the ATTs and PTTs were significantly higher in the OPo group compared with the Normal group (22.2% and 34.8% in the ATT and PTT, respectively, P<0.01). The cross-sectional area in the ATTs was significantly higher for the OPo group than in the Normal group (Normal/OPo difference was 28.7, P<0.01). Such a difference for PTTs did not reach the significance level. Mean aFrac-LongT2 and cross-sectional area in the OPe group were higher than the Normal group and lower than the OPo group. However, the differences did not show statistical significance, likely due to the higher BMI in the OPe group. Conclusions Dual-echo UTE-MRI is a rapid quantification technique, and aFrac-LongT2 values showed significant differences in tendons between Normal and OPo patients.
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Affiliation(s)
- Saeed Jerban
- Department of Radiology, University of California, San Diego, La Jolla, CA, USA
- Research Service, Veterans Affairs San Diego Healthcare System, San Diego, La Jolla, CA, USA
- Department of Orthopaedic Surgery, University of California, San Diego, La Jolla, CA, USA
| | - Dina Moazamian
- Department of Radiology, University of California, San Diego, La Jolla, CA, USA
| | - Yajun Ma
- Department of Radiology, University of California, San Diego, La Jolla, CA, USA
- Research Service, Veterans Affairs San Diego Healthcare System, San Diego, La Jolla, CA, USA
| | - Amir Masoud Afsahi
- Department of Radiology, University of California, San Diego, La Jolla, CA, USA
| | - Sophia Dwek
- Department of Radiology, University of California, San Diego, La Jolla, CA, USA
| | - Jiyo Athertya
- Department of Radiology, University of California, San Diego, La Jolla, CA, USA
| | - Bhavsimran Malhi
- Department of Radiology, University of California, San Diego, La Jolla, CA, USA
| | - Hyungseok Jang
- Department of Radiology, University of California, San Diego, La Jolla, CA, USA
- Research Service, Veterans Affairs San Diego Healthcare System, San Diego, La Jolla, CA, USA
| | - Gina Woods
- Department of Medicine, University of California, San Diego, La Jolla, CA, USA
| | - Christine B. Chung
- Department of Radiology, University of California, San Diego, La Jolla, CA, USA
- Research Service, Veterans Affairs San Diego Healthcare System, San Diego, La Jolla, CA, USA
| | - Jiang Du
- Department of Radiology, University of California, San Diego, La Jolla, CA, USA
- Research Service, Veterans Affairs San Diego Healthcare System, San Diego, La Jolla, CA, USA
| | - Eric Y. Chang
- Department of Radiology, University of California, San Diego, La Jolla, CA, USA
- Research Service, Veterans Affairs San Diego Healthcare System, San Diego, La Jolla, CA, USA
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Jerban S, Afsahi AM, Ma Y, Moazamian D, Statum S, Lombardi AF, Kakos L, Dorthe E, Dlima D, Du J, Chung CB, Chang EY. Correlations between elastic modulus and ultrashort echo time (UTE) adiabatic T1ρ relaxation time (UTE-Adiab-T1ρ) in Achilles tendons and entheses. J Biomech 2023; 160:111825. [PMID: 37856976 PMCID: PMC10991081 DOI: 10.1016/j.jbiomech.2023.111825] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 09/27/2023] [Accepted: 10/03/2023] [Indexed: 10/21/2023]
Abstract
Patients with psoriatic arthritis commonly have abnormalities of their entheses, which are the connections between tendons and bone. There are shortcomings with the use of conventional magnetic resonance imaging (MRI) sequences for the evaluation of entheses and tendons, whereas ultrashort echo time (UTE) sequences are superior for the detection of high signals, and can also be used for non-invasive quantitative assessments of these structures. The combination of UTE-MRI with an adiabatic-T1ρ preparation (UTE-Adiab-T1ρ) allows for reliable assessment of entheses and tendons with decreased susceptibility to detrimental magic angle effects. This study aimed to investigate the relationship between quantitative UTE-MRI measures and the biomechanical properties of Achilles tendons and entheses. In total, 28 tendon-enthesis sections were harvested from 11 fresh-frozen human cadaveric foot-ankle specimens (52 ± years old). Tendon-enthesis sections were scanned using the UTE-Adiab-T1ρ and UTE-T1 sequences on a clinical 3 T scanner. MRI-based measures and indentation tests were performed on the enthesis, transitional, and tensile tendon zones of the specimens. Hayes' elastic modulus showed significant inverse correlations (Spearman's) with UTE-Adiab-T1ρ in all zones (R= - 0.46, - 0.54, and - 0.61 in enthesis, transition, and tensile tendon zones, respectively). Oliver-Pharr's elastic modulus showed significant inverse correlations with UTE-Adiab-T1ρ in transition (R= - 0.52) and tensile tendon zone (R=- 0.60). UTE-T1 did not show significant correlations with the elastic modulus. UTE-MRI and elastic modulus were significantly lower in the tensile tendon compared with the enthesis regions This study highlights the potential of the UTE-Adiab-T1ρ technique for the non-invasive evaluation of tendons and enthuses.
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Affiliation(s)
- Saeed Jerban
- Department of Radiology, University of California, San Diego, La Jolla, CA, USA; Radiology Service, Veterans Affairs San Diego Healthcare System, San Diego, La Jolla, CA, USA; Department of Orthopaedic Surgery, University of California, San Diego, La Jolla, CA, USA.
| | - Amir Masoud Afsahi
- Department of Radiology, University of California, San Diego, La Jolla, CA, USA
| | - Yajun Ma
- Department of Radiology, University of California, San Diego, La Jolla, CA, USA; Radiology Service, Veterans Affairs San Diego Healthcare System, San Diego, La Jolla, CA, USA
| | - Dina Moazamian
- Department of Radiology, University of California, San Diego, La Jolla, CA, USA
| | - Sheronda Statum
- Department of Radiology, University of California, San Diego, La Jolla, CA, USA; Radiology Service, Veterans Affairs San Diego Healthcare System, San Diego, La Jolla, CA, USA
| | - Alecio F Lombardi
- Department of Radiology, University of California, San Diego, La Jolla, CA, USA; Radiology Service, Veterans Affairs San Diego Healthcare System, San Diego, La Jolla, CA, USA
| | - Lena Kakos
- Department of Radiology, University of California, San Diego, La Jolla, CA, USA
| | - Erik Dorthe
- Shiley Center for Orthopaedic Research and Education at Scripps Clinic, La Jolla, CA, USA
| | - Daryll Dlima
- Shiley Center for Orthopaedic Research and Education at Scripps Clinic, La Jolla, CA, USA
| | - Jiang Du
- Department of Radiology, University of California, San Diego, La Jolla, CA, USA; Radiology Service, Veterans Affairs San Diego Healthcare System, San Diego, La Jolla, CA, USA
| | - Christine B Chung
- Department of Radiology, University of California, San Diego, La Jolla, CA, USA; Radiology Service, Veterans Affairs San Diego Healthcare System, San Diego, La Jolla, CA, USA
| | - Eric Y Chang
- Department of Radiology, University of California, San Diego, La Jolla, CA, USA; Radiology Service, Veterans Affairs San Diego Healthcare System, San Diego, La Jolla, CA, USA.
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Zellers JA, Edalati M, Eekhoff JD, McNish R, Tang SY, Lake SP, Mueller MJ, Hastings MK, Zheng J. Quantative MRI predicts tendon mechanical behavior, collagen composition, and organization. J Orthop Res 2023; 41:2329-2338. [PMID: 36324161 PMCID: PMC10151441 DOI: 10.1002/jor.25471] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Revised: 09/06/2022] [Accepted: 10/08/2022] [Indexed: 11/05/2022]
Abstract
Quantitative magnetic resonance imaging (qMRI) measures have provided insights into the composition, quality, and structure-function of musculoskeletal tissues. Low signal-to-noise ratio has limited application to tendon. Advances in scanning sequences and sample positioning have improved signal from tendon allowing for evaluation of structure and function. The purpose of this study was to elucidate relationships between tendon qMRI metrics (T1, T2, T1ρ and diffusion tensor imaging [DTI] metrics) with tendon tissue mechanics, collagen concentration and organization. Sixteen human Achilles tendon specimens were collected, imaged with qMRI, and subjected to mechanical testing with quantitative polarized light imaging. T2 values were related to tendon mechanics [peak stress (rsp = 0.51, p = 0.044), equilibrium stress (rsp = 0.54, p = 0.033), percent relaxation (rsp = -0.55, p = 0.027), hysteresis (rsp = -0.64, p = 0.007), linear modulus (rsp = 0.67, p = 0.009)]. T1ρ had a statistically significant relationship with percent relaxation (r = 0.50, p = 0.048). Collagen content was significantly related to DTI measures (range of r = 0.56-0.62). T2 values from a single slice of the midportion of human Achilles tendons were strongest predictors of tendon tensile mechanical metrics. DTI diffusivity indices (mean diffusivity, axial diffusivity, radial diffusivity) were strongly correlated with collagen content. These findings build on a growing body of literature supporting the feasibility of qMRI to characterize tendon tissue and noninvasively measure tendon structure and function. Statement of Clinical Significance: Quantitative MRI can be applied to characterize tendon tissue and is a noninvasive measure that relates to tendon composition and mechanical behavior.
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Affiliation(s)
- Jennifer A. Zellers
- Program in Physical Therapy; Washington University School of Medicine in St. Louis
- Department of Orthopaedic Surgery; Washington University School of Medicine in St. Louis
| | - Masoud Edalati
- Mallinckrodt Institute of Radiology; Washington University School of Medicine in St. Louis
| | - Jeremy D. Eekhoff
- Department of Biomedical Engineering; Washington University in St. Louis
| | - Reika McNish
- Program in Physical Therapy; Washington University School of Medicine in St. Louis
| | - Simon Y. Tang
- Department of Orthopaedic Surgery; Washington University School of Medicine in St. Louis
| | - Spencer P. Lake
- Department of Orthopaedic Surgery; Washington University School of Medicine in St. Louis
- Department of Mechanical Engineering & Materials Science; Washington University in St. Louis
| | - Michael J. Mueller
- Program in Physical Therapy; Washington University School of Medicine in St. Louis
- Mallinckrodt Institute of Radiology; Washington University School of Medicine in St. Louis
| | - Mary K. Hastings
- Program in Physical Therapy; Washington University School of Medicine in St. Louis
- Department of Orthopaedic Surgery; Washington University School of Medicine in St. Louis
| | - Jie Zheng
- Mallinckrodt Institute of Radiology; Washington University School of Medicine in St. Louis
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Jerban S, Ma Y, Alenezi S, Moazamian D, Athertya J, Jang H, Dorthe E, Dlima D, Woods G, Chung CB, Chang EY, Du J. Ultrashort Echo Time (UTE) MRI porosity index (PI) and suppression ratio (SR) correlate with the cortical bone microstructural and mechanical properties: Ex vivo study. Bone 2023; 169:116676. [PMID: 36657630 PMCID: PMC9987215 DOI: 10.1016/j.bone.2023.116676] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 12/19/2022] [Accepted: 01/08/2023] [Indexed: 01/18/2023]
Abstract
Ultrashort echo time (UTE) MRI can image and consequently enable quantitative assessment of cortical bone. UTE-MRI-based evaluation of bone is largely underutilized due to the high cost and time demands of MRI in general. The signal ratio in dual-echo UTE imaging, known as porosity index (PI), as well as the signal ratio between UTE and inversion recovery UTE (IR-UTE) imaging, known as the suppression ratio (SR), are two rapid UTE-based bone evaluation techniques (∼ 5 mins scan time each), which can potentially reduce the time demand and cost in future clinical studies. This study aimed to investigate the correlations of PI and SR measures with cortical bone microstructural and mechanical properties. Cortical bone strips (n = 135) from tibial and femoral midshafts of 37 donors (61 ± 24 years old) were scanned using a dual-echo 3D Cones UTE sequence and a 3D Cones IR-UTE sequence for PI and SR calculations, respectively. Average bone mineral density, porosity, and pore size were measured using microcomputed tomography (μCT). Bone mechanical properties were measured using 4-point bending tests. The μCT measures showed significant correlations with PI (moderate to strong, R = 0.68-0.71) and SR (moderate, R = 0.58-0.68). Young's modulus, yield stress, and ultimate stress demonstrated significant moderate correlations with PI and SR (R = 0.52-0.62) while significant strong correlations with μCT measures (R > 0.7). PI and SR can potentially serve as fast and noninvasive (non-ionizing radiation) biomarkers for evaluating cortical bone in various bone diseases.
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Affiliation(s)
- Saeed Jerban
- Department of Radiology, University of California, San Diego, La Jolla, CA, USA; Radiology Service, Veterans Affairs San Diego Healthcare System, San Diego, La Jolla, CA, USA; Department of Orthopedic Surgery, University of California, San Diego, La Jolla, CA, USA.
| | - Yajun Ma
- Department of Radiology, University of California, San Diego, La Jolla, CA, USA; Radiology Service, Veterans Affairs San Diego Healthcare System, San Diego, La Jolla, CA, USA
| | - Salem Alenezi
- Research and Laboratories Sector, Saudi Food and Drug Authority, Riyadh, Kingdom of Saudi Arabia
| | - Dina Moazamian
- Department of Radiology, University of California, San Diego, La Jolla, CA, USA
| | - Jiyo Athertya
- Department of Radiology, University of California, San Diego, La Jolla, CA, USA
| | - Hyungseok Jang
- Department of Radiology, University of California, San Diego, La Jolla, CA, USA; Radiology Service, Veterans Affairs San Diego Healthcare System, San Diego, La Jolla, CA, USA
| | - Erik Dorthe
- Shiley Center for Orthopedic Research and Education at Scripps Clinic, La Jolla, CA, USA
| | - Darryl Dlima
- Shiley Center for Orthopedic Research and Education at Scripps Clinic, La Jolla, CA, USA
| | - Gina Woods
- Department of Medicine, University of California, San Diego, La Jolla, CA, USA
| | - Christine B Chung
- Department of Radiology, University of California, San Diego, La Jolla, CA, USA; Radiology Service, Veterans Affairs San Diego Healthcare System, San Diego, La Jolla, CA, USA
| | - Eric Y Chang
- Department of Radiology, University of California, San Diego, La Jolla, CA, USA; Radiology Service, Veterans Affairs San Diego Healthcare System, San Diego, La Jolla, CA, USA
| | - Jiang Du
- Department of Radiology, University of California, San Diego, La Jolla, CA, USA; Radiology Service, Veterans Affairs San Diego Healthcare System, San Diego, La Jolla, CA, USA.
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Jerban S, Ma Y, Moazamian D, Athertya J, Dwek S, Jang H, Woods G, Chung CB, Chang EY, Du J. MRI-based porosity index (PI) and suppression ratio (SR) in the tibial cortex show significant differences between normal, osteopenic, and osteoporotic female subjects. Front Endocrinol (Lausanne) 2023; 14:1148345. [PMID: 37025410 PMCID: PMC10070867 DOI: 10.3389/fendo.2023.1148345] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Accepted: 03/09/2023] [Indexed: 04/08/2023] Open
Abstract
Introduction Ultrashort echo time (UTE) MRI enables quantitative assessment of cortical bone. The signal ratio in dual-echo UTE imaging, known as porosity index (PI), as well as the signal ratio between UTE and inversion recovery UTE (IR-UTE) imaging, known as the suppression ratio (SR), are two rapid UTE-based bone evaluation techniques developed to reduce the time demand and cost in future clinical studies. The goal of this study was to investigate the performance of PI and SR in detecting bone quality differences between subjects with osteoporosis (OPo), osteopenia (OPe), and normal bone (Normal). Methods Tibial midshaft of fourteen OPe (72 ± 6 years old), thirty-one OPo (72 ± 6 years old), and thirty-seven Normal (36 ± 19 years old) subjects were scanned using dual-echo UTE and IR-UTE sequences on a clinical 3T scanner. Measured PI, SR, and bone thickness were compared between OPo, OPe, and normal bone (Normal) subjects using the Kruskal-Wallis test by ranks. Spearman's rank correlation coefficients were calculated between dual-energy x-ray absorptiometry (DEXA) T-score and UTE-MRI results. Results PI was significantly higher in the OPo group compared with the Normal (24.1%) and OPe (16.3%) groups. SR was significantly higher in the OPo group compared with the Normal (41.5%) and OPe (21.8%) groups. SR differences between the OPe and Normal groups were also statistically significant (16.2%). Cortical bone was significantly thinner in the OPo group compared with the Normal (22.0%) and OPe (13.0%) groups. DEXA T-scores in subjects were significantly correlated with PI (R=-0.32), SR (R=-0.50), and bone thickness (R=0.51). Discussion PI and SR, as rapid UTE-MRI-based techniques, may be useful tools to detect and monitor bone quality changes, in addition to bone morphology, in individuals affected by osteoporosis.
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Affiliation(s)
- Saeed Jerban
- Department of Radiology, University of California, San Diego, CA, United States
- Radiology Service, Department of Research, Veterans Affairs San Diego Healthcare System, San Diego, CA, United States
- Department of Orthopaedic Surgery, University of California, San Diego, CA, United States
| | - Yajun Ma
- Department of Radiology, University of California, San Diego, CA, United States
- Radiology Service, Department of Research, Veterans Affairs San Diego Healthcare System, San Diego, CA, United States
| | - Dina Moazamian
- Department of Radiology, University of California, San Diego, CA, United States
| | - Jiyo Athertya
- Department of Radiology, University of California, San Diego, CA, United States
| | - Sophia Dwek
- Department of Radiology, University of California, San Diego, CA, United States
| | - Hyungseok Jang
- Department of Radiology, University of California, San Diego, CA, United States
- Radiology Service, Department of Research, Veterans Affairs San Diego Healthcare System, San Diego, CA, United States
| | - Gina Woods
- Department of Medicine, University of California, San Diego, CA, United States
| | - Christine B. Chung
- Department of Radiology, University of California, San Diego, CA, United States
- Radiology Service, Department of Research, Veterans Affairs San Diego Healthcare System, San Diego, CA, United States
| | - Eric Y. Chang
- Department of Radiology, University of California, San Diego, CA, United States
- Radiology Service, Department of Research, Veterans Affairs San Diego Healthcare System, San Diego, CA, United States
| | - Jiang Du
- Department of Radiology, University of California, San Diego, CA, United States
- Radiology Service, Department of Research, Veterans Affairs San Diego Healthcare System, San Diego, CA, United States
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Jerban S, Ma Y, Tang Q, Fu E, Szeverenyi N, Jang H, Chung CB, Du J, Chang EY. Robust Assessment of Macromolecular Fraction (MMF) in Muscle with Differing Fat Fraction Using Ultrashort Echo Time (UTE) Magnetization Transfer Modeling with Measured T1. Diagnostics (Basel) 2023; 13:876. [PMID: 36900019 PMCID: PMC10001337 DOI: 10.3390/diagnostics13050876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Revised: 02/17/2023] [Accepted: 02/21/2023] [Indexed: 03/03/2023] Open
Abstract
Magnetic resonance imaging (MRI) is widely regarded as the most comprehensive imaging modality to assess skeletal muscle quality and quantity. Magnetization transfer (MT) imaging can be used to estimate the fraction of water and macromolecular proton pools, with the latter including the myofibrillar proteins and collagen, which are related to the muscle quality and its ability to generate force. MT modeling combined with ultrashort echo time (UTE-MT modeling) may improve the evaluation of the myotendinous junction and regions with fibrotic tissues in the skeletal muscles, which possess short T2 values and higher bound-water concentration. The fat present in muscle has always been a source of concern in macromolecular fraction (MMF) calculation. This study aimed to investigate the impact of fat fraction (FF) on the estimated MMF in bovine skeletal muscle phantoms embedded in pure fat. MMF was calculated for several regions of interest (ROIs) with differing FFs using UTE-MT modeling with and without T1 measurement and B1 correction. Calculated MMF using measured T1 showed a robust trend, particularly with a negligible error (<3%) for FF < 20%. Around 5% MMF reduction occurred for FF > 30%. However, MMF estimation using a constant T1 was robust only for regions with FF < 10%. The MTR and T1 values were also robust for only FF < 10%. This study highlights the potential of the UTE-MT modeling with accurate T1 measurement for robust muscle assessment while remaining insensitive to fat infiltration up to moderate levels.
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Affiliation(s)
- Saeed Jerban
- Department of Radiology, University of California, La Jolla, San Diego, CA 92093, USA
- Radiology Service, Veterans Affairs San Diego Healthcare System, La Jolla, San Diego, CA 92161, USA
- Department of Orthopedic Surgery, University of California, La Jolla, San Diego, CA 92093, USA
| | - Yajun Ma
- Department of Radiology, University of California, La Jolla, San Diego, CA 92093, USA
- Radiology Service, Veterans Affairs San Diego Healthcare System, La Jolla, San Diego, CA 92161, USA
| | - Qingbo Tang
- Department of Radiology, University of California, La Jolla, San Diego, CA 92093, USA
- Radiology Service, Veterans Affairs San Diego Healthcare System, La Jolla, San Diego, CA 92161, USA
| | - Eddie Fu
- Radiology Service, Veterans Affairs San Diego Healthcare System, La Jolla, San Diego, CA 92161, USA
| | - Nikolaus Szeverenyi
- Department of Radiology, University of California, La Jolla, San Diego, CA 92093, USA
| | - Hyungseok Jang
- Department of Radiology, University of California, La Jolla, San Diego, CA 92093, USA
- Radiology Service, Veterans Affairs San Diego Healthcare System, La Jolla, San Diego, CA 92161, USA
| | - Christine B. Chung
- Department of Radiology, University of California, La Jolla, San Diego, CA 92093, USA
- Radiology Service, Veterans Affairs San Diego Healthcare System, La Jolla, San Diego, CA 92161, USA
| | - Jiang Du
- Department of Radiology, University of California, La Jolla, San Diego, CA 92093, USA
- Radiology Service, Veterans Affairs San Diego Healthcare System, La Jolla, San Diego, CA 92161, USA
| | - Eric Y. Chang
- Department of Radiology, University of California, La Jolla, San Diego, CA 92093, USA
- Radiology Service, Veterans Affairs San Diego Healthcare System, La Jolla, San Diego, CA 92161, USA
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Ultrashort echo time magnetization transfer imaging of knee cartilage and meniscus after long-distance running. Eur Radiol 2023:10.1007/s00330-023-09462-x. [PMID: 36814033 DOI: 10.1007/s00330-023-09462-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 11/20/2022] [Accepted: 01/22/2023] [Indexed: 02/24/2023]
Abstract
OBJECTIVE To assess the detection of changes in knee cartilage and meniscus of amateur marathon runners before and after long-distance running using a 3D ultrashort echo time MRI sequence with magnetization transfer preparation (UTE-MT). METHODS We recruited 23 amateur marathon runners (46 knees) in this prospective cohort study. MRI scans using UTE-MT and UTE-T2* sequences were performed pre-race, 2 days post-race, and 4 weeks post-race. UTE-MT ratio (UTE-MTR) and UTE-T2* were measured for knee cartilage (eight subregions) and meniscus (four subregions). The sequence reproducibility and inter-rater reliability were also investigated. RESULTS Both the UTE-MTR and UTE-T2* measurements showed good reproducibility and inter-rater reliability. For most subregions of cartilage and meniscus, the UTE-MTR values decreased 2 days post-race and increased after 4 weeks of rest. Conversely, the UTE-T2* values increased 2 days post-race and decreased after 4 weeks. The UTE-MTR values in lateral tibial plateau, central medial femoral condyle, and medial tibial plateau showed a significant decrease at 2 days post-race compared to the other two time points (p < 0.05). By comparison, no significant UTE-T2* changes were found for any cartilage subregions. For meniscus, the UTE-MTR values in medial posterior horn and lateral posterior horn regions at 2 days post-race were significantly lower than those at pre-race and 4 weeks post-race (p < 0.05). By comparison, only the UTE-T2* values in medial posterior horn showed a significant difference. CONCLUSIONS UTE-MTR is a promising method for the detection of dynamic changes in knee cartilage and meniscus after long-distance running. KEY POINTS • Long-distance running causes changes in the knee cartilage and meniscus. • UTE-MT monitors dynamic changes of knee cartilage and meniscal non-invasively. • UTE-MT is superior to UTE-T2* in monitoring dynamic changes in knee cartilage and meniscus.
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Ma Y, Jang H, Jerban S, Chang EY, Chung CB, Bydder GM, Du J. Making the invisible visible-ultrashort echo time magnetic resonance imaging: Technical developments and applications. APPLIED PHYSICS REVIEWS 2022; 9:041303. [PMID: 36467869 PMCID: PMC9677812 DOI: 10.1063/5.0086459] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Accepted: 09/12/2022] [Indexed: 05/25/2023]
Abstract
Magnetic resonance imaging (MRI) uses a large magnetic field and radio waves to generate images of tissues in the body. Conventional MRI techniques have been developed to image and quantify tissues and fluids with long transverse relaxation times (T2s), such as muscle, cartilage, liver, white matter, gray matter, spinal cord, and cerebrospinal fluid. However, the body also contains many tissues and tissue components such as the osteochondral junction, menisci, ligaments, tendons, bone, lung parenchyma, and myelin, which have short or ultrashort T2s. After radio frequency excitation, their transverse magnetizations typically decay to zero or near zero before the receiving mode is enabled for spatial encoding with conventional MR imaging. As a result, these tissues appear dark, and their MR properties are inaccessible. However, when ultrashort echo times (UTEs) are used, signals can be detected from these tissues before they decay to zero. This review summarizes recent technical developments in UTE MRI of tissues with short and ultrashort T2 relaxation times. A series of UTE MRI techniques for high-resolution morphological and quantitative imaging of these short-T2 tissues are discussed. Applications of UTE imaging in the musculoskeletal, nervous, respiratory, gastrointestinal, and cardiovascular systems of the body are included.
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Affiliation(s)
- Yajun Ma
- Department of Radiology, University of California, San Diego, California 92037, USA
| | - Hyungseok Jang
- Department of Radiology, University of California, San Diego, California 92037, USA
| | - Saeed Jerban
- Department of Radiology, University of California, San Diego, California 92037, USA
| | | | | | - Graeme M Bydder
- Department of Radiology, University of California, San Diego, California 92037, USA
| | - Jiang Du
- Author to whom correspondence should be addressed:. Tel.: (858) 246-2248, Fax: (858) 246-2221
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10
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Su X, Zhang Y, Gao Q, Liang Z, Wan L, Zhang L, Tang G. Preliminary study on the assessment of early cartilage degeneration by quantitative ultrashort echo time magnetic resonance imaging in vivo. Quant Imaging Med Surg 2022; 12:3803-3812. [PMID: 35782245 PMCID: PMC9246734 DOI: 10.21037/qims-21-1181] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2021] [Accepted: 04/14/2022] [Indexed: 12/31/2023]
Abstract
BACKGROUND To investigate the feasibility of quantitative ultrashort echo time magnetic resonance imaging (UTE-MRI) techniques for assessing early cartilage degeneration in vivo. METHODS A total of 46 patients with knee pain due to osteoarthritis (OA) as the main complaint were recruited into the study. We performed MRI examinations with different quantitative UTE-MRI techniques, including UTE-based magnetization transfer (MT), UTE-adiabaticT1ρ, and UTE-T2* mapping on a 3.0T clinical magnetic resonance (MR) scanner (MR750; GE Healthcare, Milwaukee, WI, USA). Three regions of interest (ROIs) were manually drawn on the medial and lateral femoral condyles and the corresponding medial and lateral tibial plateaus, respectively. A total of 561 ROIs (12 ROIs for each knee) were finally included and divided into 3 groups according to the MRI Osteoarthritis Knee Score (MOAKS): normal (MOAKS 0, n=175), mild degeneration (MOAKS 1, n=283), and moderate degeneration (MOAKS 2, n=103). One-way analysis of variance (ANOVA) and Tamhane's T2 test were used to compare the differences of quantitative UTE-biomarkers among different groups. The analysis of Spearman's correlation was used to assess the correlation between the UTE-biomarkers and MOAKS grading. The diagnostic efficacy of different quantitative UTE-MRI techniques for detecting mild cartilage degeneration was evaluated using the receiver operating characteristic (ROC) curve. RESULTS The UTE-MT ratio (UTE-MTR) and the UTE-adiabatic T1ρ values had a moderate correlation with the MOAKS grading (r=-0.523, P<0.001; r=0.531, P<0.001, respectively), while the UTE-T2* was weakly correlated with the MOAKS grading (r=-0.396, P<0.001). For the normal group (MOAKS 0) and the mild group (MOAKS 1), the UTE-MTR values were 21.09%±3.03% and 17.30%±3.22%, respectively. The UTE-adiabatic T1ρ values were 30.43±6.26 ms and 35.05±8.78 ms for the normal group (MOAKS 0) and the mild group (MOAKS 1), respectively. With respect to the UTE-T2* values, the normal group (MOAKS 0) values were 21.49±3.96 ms and the mild group (MOAKS 1) values were 19.86±3.08 ms. All the differences between the 2 groups of the 3 UTE-MRI values were significant. The AUCs of the UTE-MTR, UTE-adiabatic T1ρ, and UTE-T2* mapping were 0.794, 0.732, and 0.651, respectively. CONCLUSIONS The quantitative UTE-MRI techniques (UTE-MT, UTE-adiabatic T1ρ, and UTE-T2* mapping) show great promise for assessing the early degeneration of articular cartilage in vivo, and the UTE-MT and UTE-adiabatic T1ρ values show better diagnostic efficacy than UTE-T2* mapping.
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Affiliation(s)
- Xiaolian Su
- Department of Radiology, Shanghai Tenth People’s Hospital, Tongji University School of Medicine, Shanghai, China
| | - Yixuan Zhang
- Department of Radiology, Hebei Cangzhou Hospital of Integrated Traditional Chinese Medicine and Western Medicine, Cangzhou, China
| | - Qiuming Gao
- Department of Orthopedics, Shanghai Tenth People’s Hospital, Tongji University School of Medicine, Shanghai, China
| | - Zonghui Liang
- Department of Radiology, Shanghai Jing’an District Central Hospital, Shanghai, China
| | - Lidi Wan
- Department of Radiology, Shanghai Tenth People’s Hospital, Tongji University School of Medicine, Shanghai, China
| | - Lin Zhang
- Department of Radiology, Shanghai Tenth People’s Hospital, Tongji University School of Medicine, Shanghai, China
| | - Guangyu Tang
- Department of Radiology, Shanghai Tenth People’s Hospital, Tongji University School of Medicine, Shanghai, China
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11
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Jerban S, Ma Y, Afsahi AM, Lombardi A, Wei Z, Shen M, Wu M, Le N, Chang DG, Chung CB, Du J, Chang EY. Lower Macromolecular Content in Tendons of Female Patients with Osteoporosis versus Patients with Osteopenia Detected by Ultrashort Echo Time (UTE) MRI. Diagnostics (Basel) 2022; 12:1061. [PMID: 35626217 PMCID: PMC9140093 DOI: 10.3390/diagnostics12051061] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Revised: 04/20/2022] [Accepted: 04/21/2022] [Indexed: 01/30/2023] Open
Abstract
Tendons and bones comprise a special interacting unit where mechanical, biochemical, and metabolic interplays are continuously in effect. Bone loss in osteoporosis (OPo) and its earlier stage disease, osteopenia (OPe), may be coupled with a reduction in tendon quality. Noninvasive means for quantitatively evaluating tendon quality during disease progression may be critically important for the improvement of characterization and treatment optimization in patients with bone mineral density disorders. Though clinical magnetic resonance imaging (MRI) sequences are not typically capable of directly visualizing tendons, ultrashort echo time MRI (UTE-MRI) is able to acquire a high signal from tendons. Magnetization transfer (MT) modeling combined with UTE-MRI (i.e., UTE-MT-modeling) can indirectly assess macromolecular proton content in tendons. This study aimed to determine whether UTE-MT-modeling could detect differences in tendon quality across a spectrum of bone health. The lower legs of 14 OPe (72 ± 6 years) and 31 OPo (73 ± 6 years) female patients, as well as 30 female participants with normal bone (Normal-Bone, 36 ± 19 years), are imaged using UTE sequences on a 3T MRI scanner. Institutional review board approval is obtained for the study, and all recruited subjects provided written informed consent. A T1 measurement and UTE-MT-modeling are performed on the anterior tibialis tendon (ATT), posterior tibialis tendon (PTT), and the proximal Achilles tendon (PAT) of all subjects. The macromolecular fraction (MMF) is estimated as the main measure from UTE-MT-modeling. The mean MMF in all the investigated tendons was significantly lower in OPo patients compared with the Normal-Bone cohort (mean difference of 24.2%, p < 0.01), with the largest Normal-Bone vs. OPo difference observed in the ATT (mean difference of 32.1%, p < 0.01). Average MMF values of all the studied tendons are significantly lower in the OPo cohort compared with the OPe cohort (mean difference 16.8%, p = 0.02). Only the PPT shows significantly higher T1 values in OPo patients compared with the Normal-Bone cohort (mean difference 17.6%, p < 0.01). Considering the differences between OPo and OPe groups with similar age ranges, tendon deterioration associated with declining bone health was found to be larger than a priori detected differences caused purely by aging, highlighting UTE-MT MRI techniques as useful methods in assessing tendon quality over the course of progressive bone weakening.
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Affiliation(s)
- Saeed Jerban
- Department of Radiology, University of California, San Diego, CA 92093, USA; (Y.M.); (A.M.A.); (A.L.); (Z.W.); (M.S.); (M.W.); (N.L.); (C.B.C.); (J.D.)
| | - Yajun Ma
- Department of Radiology, University of California, San Diego, CA 92093, USA; (Y.M.); (A.M.A.); (A.L.); (Z.W.); (M.S.); (M.W.); (N.L.); (C.B.C.); (J.D.)
| | - Amir Masoud Afsahi
- Department of Radiology, University of California, San Diego, CA 92093, USA; (Y.M.); (A.M.A.); (A.L.); (Z.W.); (M.S.); (M.W.); (N.L.); (C.B.C.); (J.D.)
| | - Alecio Lombardi
- Department of Radiology, University of California, San Diego, CA 92093, USA; (Y.M.); (A.M.A.); (A.L.); (Z.W.); (M.S.); (M.W.); (N.L.); (C.B.C.); (J.D.)
- Research Service, Veterans Affairs San Diego Healthcare System, San Diego, CA 92161, USA
| | - Zhao Wei
- Department of Radiology, University of California, San Diego, CA 92093, USA; (Y.M.); (A.M.A.); (A.L.); (Z.W.); (M.S.); (M.W.); (N.L.); (C.B.C.); (J.D.)
| | - Meghan Shen
- Department of Radiology, University of California, San Diego, CA 92093, USA; (Y.M.); (A.M.A.); (A.L.); (Z.W.); (M.S.); (M.W.); (N.L.); (C.B.C.); (J.D.)
| | - Mei Wu
- Department of Radiology, University of California, San Diego, CA 92093, USA; (Y.M.); (A.M.A.); (A.L.); (Z.W.); (M.S.); (M.W.); (N.L.); (C.B.C.); (J.D.)
| | - Nicole Le
- Department of Radiology, University of California, San Diego, CA 92093, USA; (Y.M.); (A.M.A.); (A.L.); (Z.W.); (M.S.); (M.W.); (N.L.); (C.B.C.); (J.D.)
- Research Service, Veterans Affairs San Diego Healthcare System, San Diego, CA 92161, USA
| | - Douglas G. Chang
- Department of Orthopaedic Surgery, University of California, San Diego, CA 92093, USA;
| | - Christine B. Chung
- Department of Radiology, University of California, San Diego, CA 92093, USA; (Y.M.); (A.M.A.); (A.L.); (Z.W.); (M.S.); (M.W.); (N.L.); (C.B.C.); (J.D.)
- Research Service, Veterans Affairs San Diego Healthcare System, San Diego, CA 92161, USA
| | - Jiang Du
- Department of Radiology, University of California, San Diego, CA 92093, USA; (Y.M.); (A.M.A.); (A.L.); (Z.W.); (M.S.); (M.W.); (N.L.); (C.B.C.); (J.D.)
- Research Service, Veterans Affairs San Diego Healthcare System, San Diego, CA 92161, USA
| | - Eric Y. Chang
- Department of Radiology, University of California, San Diego, CA 92093, USA; (Y.M.); (A.M.A.); (A.L.); (Z.W.); (M.S.); (M.W.); (N.L.); (C.B.C.); (J.D.)
- Research Service, Veterans Affairs San Diego Healthcare System, San Diego, CA 92161, USA
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12
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Jerban S, Hananouchi T, Ma Y, Namiranian B, Dorthe EW, Wong JH, Shojaeiadib N, Wu M, Du J, D’Lima D, Chung CB, Chang EY. Correlation between the elastic modulus of anterior cruciate ligament (ACL) and quantitative ultrashort echo time (UTE) magnetic resonance imaging. J Orthop Res 2022; 40:2330-2339. [PMID: 35092077 PMCID: PMC9332184 DOI: 10.1002/jor.25266] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 08/11/2021] [Accepted: 01/06/2022] [Indexed: 02/04/2023]
Abstract
Conventional magnetic resonance imaging (MRI) often acquires no signal in anterior cruciate ligament (ACL) due to the short apparent transverse relaxation time of ACL. Ultrashort echo time (UTE) MRI is capable of imaging ACL with high signal which enables quantitative ACL assessment. This study aimed to investigate the correlations of the mechanical and microstructural properties of human ACL specimens with quantitative three-dimensional UTE Cones (3D-UTE-Cones) MRI measures. ACL specimens were harvested from cadaveric knee joints of 13 (50.9 ± 21.1 years old, 11 males and 2 female) donors. Specimens were scanned using a series of quantitative 3D-UTE-Cones T2 * (UTE-T2 *), T1 (UTE-T1 ), Adiabatic T1ρ (UTE-Adiab-T1ρ ), and magnetization transfer (UTE-MT) sequences in a wrist coil on a clinical 3T scanner. ACL elastic modulus was measured using a uniaxial tensile mechanical test. Histomorphometry analysis was performed to measure the average fascicle specific surface, fascicle size, and number of cells per unit area. Spearman's rank correlations of UTE-MRI biomarkers with mechanical and histomorphometry measures were investigated. The elastic modulus of ACL showed significant moderate correlations with UTE-Adiab-T1ρ (R = -0.59, p = 0.01), macromolecular fraction from MT modeling (R = 0.54, p = 0.01), magnetization transfer ratio (R = 0.53, p = 0.01), UTE-T2* (R = -0.53, p = 0.01), and average fascicle specific surface (R = 0.54, p = 0.01). UTE-MRI showed nonsignificant correlations with histomorphometry measures. UTE-MRI biomarkers may be useful noninvasive tools for the ACL mechanical assessment.
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Affiliation(s)
- Saeed Jerban
- Department of Radiology, University of California San
Diego, San Diego, CA 92093, USA,Corresponding author: Darryl
D’Lima, Shiley Center for Orthopedic Research and Education at
Scripps Clinic, La Jolla, CA 92037, USA, ,
Phone: +1 858 554 7011, Fax: +1 858 554 7011; Eric Y. Chang,
Research Service, VA San Diego Healthcare System, 3350 La Jolla Village Drive,
San Diego, CA 92161, USA, , Phone: +1 858 246
2248, Fax: +1 888 960 5922;Saeed Jerban, Department of Radiology,
University of California, San Diego, 9500 Gilman Dr., La Jolla, CA 92093, USA,
, Phone: +1 858 246 2248, Fax: +1 888 960
5922
| | - Takehito Hananouchi
- Department of Mechanical Engineering, Osaka Sangyo
University, Daito, Osaka, Japan
| | - Yajun Ma
- Department of Radiology, University of California San
Diego, San Diego, CA 92093, USA
| | - Behnam Namiranian
- Department of Radiology, University of California San
Diego, San Diego, CA 92093, USA
| | - Erik W. Dorthe
- Shiley Center for Orthopedic Research and Education at
Scripps Clinic, La Jolla, CA 92037, USA
| | - Jonathan H. Wong
- Research Service, VA San Diego Healthcare System, San
Diego, CA 92161, USA
| | | | - Mei Wu
- Department of Radiology, University of California San
Diego, San Diego, CA 92093, USA
| | - Jiang Du
- Department of Radiology, University of California San
Diego, San Diego, CA 92093, USA
| | - Darryl D’Lima
- Department of Mechanical Engineering, Osaka Sangyo
University, Daito, Osaka, Japan,Corresponding author: Darryl
D’Lima, Shiley Center for Orthopedic Research and Education at
Scripps Clinic, La Jolla, CA 92037, USA, ,
Phone: +1 858 554 7011, Fax: +1 858 554 7011; Eric Y. Chang,
Research Service, VA San Diego Healthcare System, 3350 La Jolla Village Drive,
San Diego, CA 92161, USA, , Phone: +1 858 246
2248, Fax: +1 888 960 5922;Saeed Jerban, Department of Radiology,
University of California, San Diego, 9500 Gilman Dr., La Jolla, CA 92093, USA,
, Phone: +1 858 246 2248, Fax: +1 888 960
5922
| | - Christine B. Chung
- Department of Radiology, University of California San
Diego, San Diego, CA 92093, USA
| | - Eric Y. Chang
- Department of Radiology, University of California San
Diego, San Diego, CA 92093, USA,Research Service, VA San Diego Healthcare System, San
Diego, CA 92161, USA,Corresponding author: Darryl
D’Lima, Shiley Center for Orthopedic Research and Education at
Scripps Clinic, La Jolla, CA 92037, USA, ,
Phone: +1 858 554 7011, Fax: +1 858 554 7011; Eric Y. Chang,
Research Service, VA San Diego Healthcare System, 3350 La Jolla Village Drive,
San Diego, CA 92161, USA, , Phone: +1 858 246
2248, Fax: +1 888 960 5922;Saeed Jerban, Department of Radiology,
University of California, San Diego, 9500 Gilman Dr., La Jolla, CA 92093, USA,
, Phone: +1 858 246 2248, Fax: +1 888 960
5922
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13
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Fang Y, Zhu D, Wu W, Yu W, Li S, Ma Y. Assessment of Achilles Tendon Changes After Long‐Distance Running Using Ultrashort Echo Time Magnetization Transfer
MR
Imaging. J Magn Reson Imaging 2022; 56:814-823. [PMID: 35060638 DOI: 10.1002/jmri.28072] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Revised: 01/06/2022] [Accepted: 01/08/2022] [Indexed: 11/10/2022] Open
Affiliation(s)
- Yijie Fang
- Department of Radiology The Fifth Affiliated Hospital of Sun Yat‐sen University Zhuhai China
- Guangdong Provincial Key Laboratory of Biomedical Imaging The Fifth Affiliated Hospital, Sun Yat‐sen University Zhuhai China
| | - Dantian Zhu
- Department of Radiology The Fifth Affiliated Hospital of Sun Yat‐sen University Zhuhai China
- Guangdong Provincial Key Laboratory of Biomedical Imaging The Fifth Affiliated Hospital, Sun Yat‐sen University Zhuhai China
| | - Wenhao Wu
- Department of Radiology The Fifth Affiliated Hospital of Sun Yat‐sen University Zhuhai China
- Guangdong Provincial Key Laboratory of Biomedical Imaging The Fifth Affiliated Hospital, Sun Yat‐sen University Zhuhai China
| | - Wenjun Yu
- Department of Radiology The Fifth Affiliated Hospital of Sun Yat‐sen University Zhuhai China
- Guangdong Provincial Key Laboratory of Biomedical Imaging The Fifth Affiliated Hospital, Sun Yat‐sen University Zhuhai China
| | - Shaolin Li
- Department of Radiology The Fifth Affiliated Hospital of Sun Yat‐sen University Zhuhai China
- Guangdong Provincial Key Laboratory of Biomedical Imaging The Fifth Affiliated Hospital, Sun Yat‐sen University Zhuhai China
| | - Ya‐Jun Ma
- Department of Radiology University of California, San Diego San Diego California USA
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14
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Jerban S, Alenezi S, Afsahi AM, Ma Y, Du J, Chung CB, Chang E. MRI-based mechanical competence assessment of bone using micro finite element analysis (micro-FEA): Review. Magn Reson Imaging 2022; 88:9-19. [DOI: 10.1016/j.mri.2022.01.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2021] [Revised: 12/09/2021] [Accepted: 01/20/2022] [Indexed: 12/18/2022]
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15
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Jerban S, Kasibhatla A, Ma Y, Wu M, Chen Y, Guo T, Wan L, Szeverenyi N, Chang EY, Du J. Detecting Articular Cartilage and Meniscus Deformation Effects Using Magnetization Transfer Ultrashort Echo Time (MT-UTE) Modeling during Mechanical Load Application: Ex Vivo Feasibility Study. Cartilage 2021; 13:665S-673S. [PMID: 33289401 PMCID: PMC8808840 DOI: 10.1177/1947603520976771] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
OBJECTIVE Ultrashort echo time (UTE) magnetic resonance imaging (MRI) sequences have improved imaging of short T2 musculoskeletal (MSK) tissues. UTE-MRI combined with magnetization transfer modeling (UTE-MT) has demonstrated robust assessment of MSK tissues. This study aimed to investigate the variation of UTE-MT measures under mechanical loading in tibiofemoral cartilage and meniscus of cadaveric knee joints. DESIGN Fourteen knee joints from young (n = 8, 42 ± 12 years old) and elderly (n = 6, 89 ± 4 years old) donors were scanned on a 3-T scanner under 3 loading conditions: load = 300 N (Load1), load = 500 N (Load2), and load = 0 N (Unload). UTE-MT sequences were performed at each loading condition. Macromolecular proton fraction (MMF) was calculated from UTE-MT modeling. Wilcoxon rank sum test was used to examine the MRI data differences between loading conditions. RESULTS For young donors, MMF increased in all grouped regions of interest (meniscus [M], femoral articular cartilage [FAC], tibial articular cartilage [TAC], articular cartilage regions covered by meniscus [AC-MC], and articular cartilage regions uncovered by meniscus [AC-UC]) when the load increased from 300 to 500 N. The increases in MMF were significant for M (13.3%, P < 0.01) and AC-MC (9.2%, P = 0.04). MMF decreased in all studied regions after unloading, which was significant only for AC-MC (-8.9%, P = 0.01). For elderly donors, MRI parameters did not show significant changes by loading or unloading. CONCLUSION This study highlights the potential of the UTE-MT modeling combined with knee loading in differentiating between normal and abnormal knees. Average tissue deformation effects were likely higher and more uniformly distributed in the joints of young donors compared with elderly donors.
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Affiliation(s)
- Saeed Jerban
- Department of Radiology, University of
California, San Diego, CA, USA,Saeed Jerban, Department of Radiology,
University of California, 9500 Gilman Dr., San Diego, CA 92093, USA.
| | - Akhil Kasibhatla
- Department of Radiology, University of
California, San Diego, CA, USA
| | - Yajun Ma
- Department of Radiology, University of
California, San Diego, CA, USA
| | - Mei Wu
- Department of Radiology, University of
California, San Diego, CA, USA
| | - Yanjun Chen
- Department of Radiology, University of
California, San Diego, CA, USA
| | - Tan Guo
- Department of Radiology, University of
California, San Diego, CA, USA
| | - Lidi Wan
- Department of Radiology, University of
California, San Diego, CA, USA
| | | | - Eric Y. Chang
- Department of Radiology, University of
California, San Diego, CA, USA,Radiology Service, VA San Diego
Healthcare System, San Diego, CA, USA
| | - Jiang Du
- Department of Radiology, University of
California, San Diego, CA, USA
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16
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Monitoring urinary collagen metabolite changes following collagen peptide ingestion and physical activity using ELISA with anti active collagen oligopeptide antibody. Sci Rep 2021; 11:13527. [PMID: 34188133 PMCID: PMC8241845 DOI: 10.1038/s41598-021-92934-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Accepted: 06/08/2021] [Indexed: 11/08/2022] Open
Abstract
Active collagen oligopeptides (ACOP) are bioactive collagen-derived peptides detected by a recently-established ELISA. To facilitate studies of the function and metabolism of these products, this study aims to determine which of these peptides is recognized by a novel anti-ACOP antibody used in this ELISA. We then investigate the effect of collagen peptide (CP) ingestion and exercise on urinary ACOP concentrations in a cohort of university student athletes using colorimetric, LC–MS/MS, and ELISA. We observed that the antibody showed strong cross-reactivity to Pro-Hyp and Gly-Pro-Hyp and weak cross-reactivity to commercial CP. CP ingestion increased the urinary level of ACOP over time, which correlated highly with urinary levels of peptide forms of Hyp and Pro-Hyp. Physical activity significantly decreased the urinary ACOP level. This study demonstrates changes in urinary ACOP following oral CP intake and physical activity using ELISA with the novel anti-ACOP antibody. Thus, ACOP may be useful as a new biomarker for collagen metabolism.
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17
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Malmgaard-Clausen NM, Tran P, Svensson RB, Hansen P, Nybing JD, Magnusson SP, Kjaer M. Magnetic Resonance T 2 * Is Increased in Patients With Early-Stage Achilles and Patellar Tendinopathy. J Magn Reson Imaging 2021; 54:832-839. [PMID: 33719139 DOI: 10.1002/jmri.27600] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 02/25/2021] [Accepted: 03/03/2021] [Indexed: 11/05/2022] Open
Abstract
BACKGROUND T2 * mapping has proven useful in tendon research and may have the ability to detect subtle changes at an early stage of tendinopathy. PURPOSE To investigate the difference in T2 * between patients with early tendinopathy and healthy controls, and to investigate the relationship between T2 * and clinical outcomes, tendon size, and mechanical properties. STUDY TYPE Prospective cross-sectional. SUBJECTS Sixty-five patients with early tendinopathy and 25 healthy controls. FIELD STRENGTH/SEQUENCE Three Tesla, ultrashort time to echo magnetic resonance imaging. ASSESSMENT Tendon T2 * was quantified using a monoexponential fitting algorithm. Clinical symptoms were evaluated using the Victorian Institute of Sports Assessment-Achilles/Patella (VISA-A/VISA-P). In vivo mechanical properties were measured using an ultrasound-based method that determined force and deformation simultaneously in tendons of patellar tendinopathy patients. STATISTICAL TESTS A generalized linear model adjusted for age was applied to investigate the difference between patients and controls. In the two patient groups, linear regressions were applied to investigate the association between T2 * and tendon size, clinical outcomes, and biomechanical properties. RESULTS There was a significant difference in T2 * between patients and healthy controls (204.8 [95% CI: 44.5-365.0] μsec, P < 0.05). There was a positive correlation between tendon size and T2 * for both Achilles (r = 0.72; P < 0.05) and patellar tendons (r = 0.53; P < 0.05). There was no significant correlation between VISA-A and T2 * (r = -0.2; P = 0.17) or VISA-P and T2 * (r = -0.5; P = 0.0504). Lastly, there was a negative correlation between modulus and T2 * (r = -0.51; P < 0.05). DATA CONCLUSIONS T2 * mapping can detect subtle structural changes that translate to altered mechanical properties in early-phase tendinopathy. However, T2 * did not correlate with clinical scores in patients with early-phase Achilles and patellar tendinopathy. Thus, T2 * mapping may serve as a tool for early detection of structural changes in tendinopathy but does not necessarily describe the clinical severity of disease. LEVEL OF EVIDENCE 1 TECHNICAL EFFICACY STAGE: 2.
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Affiliation(s)
- Nikolaj M Malmgaard-Clausen
- Department of Orthopedic Surgery, Institute of Sports Medicine Copenhagen, Bispebjerg and Frederiksberg Hospital, Copenhagen, Denmark.,Faculty of Health Sciences, Center for Healthy Aging, University of Copenhagen, Copenhagen, Denmark
| | - Peter Tran
- Department of Orthopedic Surgery, Institute of Sports Medicine Copenhagen, Bispebjerg and Frederiksberg Hospital, Copenhagen, Denmark.,Faculty of Health Sciences, Center for Healthy Aging, University of Copenhagen, Copenhagen, Denmark
| | - Rene B Svensson
- Department of Orthopedic Surgery, Institute of Sports Medicine Copenhagen, Bispebjerg and Frederiksberg Hospital, Copenhagen, Denmark.,Faculty of Health Sciences, Center for Healthy Aging, University of Copenhagen, Copenhagen, Denmark
| | - Philip Hansen
- Department of Radiology, Copenhagen University Hospital, Bispebjerg and Frederiksberg, Copenhagen, Denmark
| | - Janus D Nybing
- Department of Radiology, Copenhagen University Hospital, Bispebjerg and Frederiksberg, Copenhagen, Denmark
| | - Stig Peter Magnusson
- Department of Orthopedic Surgery, Institute of Sports Medicine Copenhagen, Bispebjerg and Frederiksberg Hospital, Copenhagen, Denmark.,Faculty of Health Sciences, Center for Healthy Aging, University of Copenhagen, Copenhagen, Denmark.,Department of Physical and Occupational Therapy, Bispebjerg and Frederiksberg Hospital, Copenhagen, Denmark
| | - Michael Kjaer
- Department of Orthopedic Surgery, Institute of Sports Medicine Copenhagen, Bispebjerg and Frederiksberg Hospital, Copenhagen, Denmark.,Faculty of Health Sciences, Center for Healthy Aging, University of Copenhagen, Copenhagen, Denmark
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18
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A Useful Combination of Quantitative Ultrashort Echo Time MR Imaging and a Probing Device for Biomechanical Evaluation of Articular Cartilage. BIOSENSORS-BASEL 2021; 11:bios11020052. [PMID: 33671280 PMCID: PMC7921930 DOI: 10.3390/bios11020052] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Revised: 02/01/2021] [Accepted: 02/15/2021] [Indexed: 02/07/2023]
Abstract
In this study, we combined quantitative ultrashort echo time (UTE) magnetic resonance (MR) imaging and an investigation by a probing device with tri-axial force sensor to seek correlations with mechanical properties of human patellar cartilage for in situ evaluation of biomechanical properties. Cartilage blocks (15 × 20 × 5 mm3) were dissected from the patella of six donors; 5 mm square regions of interest from the cartilage blocks were imaged using UTE-MR imaging sequences (T2* and magnetization transfer ratio (MTR)), and mechanical properties were measured using a micro indentation device. Then, the vertical reaction force on the cartilage surface was measured while push-probing forward 3 mm with the probing device at a 30° tilt to the horizontal plane. The results showed a positive correlation between stiffness/elastic modulus and each predictor variable (UTE-T2* (r = 0.240 and 0.255, respectively, UTE-MTR (r = 0.378 and 0.379, respectively), and probing device force (r = 0.426 and 0.423, respectively). Furthermore, multiple linear regression analysis showed the combination of the three predictors had stronger correlation (adjusted r2 = 0.314 (stiffness), 0.323 (elastic), respectively). Our results demonstrate the potential for these non- and less- invasive methods for in situ evaluation of the mechanical properties of cartilage tissue.
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19
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Namiranian B, Jerban S, Ma Y, Dorthe EW, Masoud-Afsahi A, Wong J, Wei Z, Chen Y, D'Lima D, Chang EY, Du J. Assessment of mechanical properties of articular cartilage with quantitative three-dimensional ultrashort echo time (UTE) cones magnetic resonance imaging. J Biomech 2020; 113:110085. [PMID: 33147490 DOI: 10.1016/j.jbiomech.2020.110085] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Revised: 09/24/2020] [Accepted: 10/16/2020] [Indexed: 12/11/2022]
Abstract
Conventional magnetic resonance imaging (MRI) is not capable of detecting signal from the deep cartilage due to its short transverse relaxation time (T2). Moreover, several quantitative MRI techniques are significantly influenced by the magic angle effect. The combinations of ultrashort echo time (UTE) MRI with magnetization transfer (UTE-MT) and Adiabatic T1ρ (UTE-AdiabT1ρ) imaging allow magic angle-insensitive assessments of all regions of articular cartilage. The purpose of this study was to investigate the correlations between quantitative three-dimensional UTE MRI biomarkers and mechanical properties of human tibiofemoral cartilage specimens. In total, 40 human tibiofemoral cartilage specimens were harvested from three male and four female donors (64 ± 18 years old). Cartilage samples were scanned using a series of quantitative 3D UTE Cones T2* (UTE-T2*), T1 (UTE-T1), UTE-AdiabT1ρ, and UTE-MT sequences in a standard knee coil on a clinical 3T scanner. UTE-MT data were acquired with a series of MT powers and frequency offsets to calculate magnetization transfer ratio (MTR), as well as macromolecular fraction (MMF) and macromolecular T2 (T2mm) through modeling. Cartilage stiffness and Hayes elastic modulus were measured using indentation tests. Correlations of 3D UTE Cones MRI measurements in the superficial layer, deep layer, and global regions of interest (ROIs) with mechanical properties were investigated. Cartilage mechanical properties demonstrated highest correlations with UTE measures of the superficial layer of cartilage. AdiabT1ρ, MTR, and MMF in superficial layer ROIs showed significant correlations with Hayes elastic modulus (p < 0.05, R = -0.54, 0.49, and 0.66, respectively). These UTE measures in global ROIs showed significant, though slightly lower, correlations with Hayes elastic modulus (p < 0.05, R = -0.37, 0.52, and 0.60, respectively). Correlations between other UTE MRI measurements (T2*, T1, and T2mm) and mechanical properties were non-significant. The 3D UTE-AdiabT1ρ and UTE-MT sequences were highlighted as promising surrogates for non-invasive assessment of cartilage mechanical properties. MMF from UTE-MT modeling showed the highest correlations with cartilage mechanics.
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Affiliation(s)
- Behnam Namiranian
- Department of Radiology, University of California San Diego, San Diego, CA 92093, USA
| | - Saeed Jerban
- Department of Radiology, University of California San Diego, San Diego, CA 92093, USA.
| | - Yajun Ma
- Department of Radiology, University of California San Diego, San Diego, CA 92093, USA
| | - Erik W Dorthe
- Shiley Center for Orthopedic Research and Education at Scripps Clinic, La Jolla, CA 92037, USA
| | - Amir Masoud-Afsahi
- Department of Radiology, University of California San Diego, San Diego, CA 92093, USA
| | - Jonathan Wong
- Research Service, VA San Diego Healthcare System, San Diego, CA 92161, USA
| | - Zhao Wei
- Department of Radiology, University of California San Diego, San Diego, CA 92093, USA
| | - Yanjun Chen
- Department of Radiology, University of California San Diego, San Diego, CA 92093, USA
| | - Darryl D'Lima
- Shiley Center for Orthopedic Research and Education at Scripps Clinic, La Jolla, CA 92037, USA
| | - Eric Y Chang
- Department of Radiology, University of California San Diego, San Diego, CA 92093, USA; Research Service, VA San Diego Healthcare System, San Diego, CA 92161, USA
| | - Jiang Du
- Department of Radiology, University of California San Diego, San Diego, CA 92093, USA.
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Stobbe RW, Beaulieu C. Three-dimensional Yarnball k-space acquisition for accelerated MRI. Magn Reson Med 2020; 85:1840-1854. [PMID: 33009872 DOI: 10.1002/mrm.28536] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 08/20/2020] [Accepted: 09/08/2020] [Indexed: 12/21/2022]
Abstract
PURPOSE To introduce an efficient sampling technique named Yarnball, which may serve as a direct alternative to 3D Cones. METHODS Yarnball evolves through 3D k-space with increasing loop size, and the differential equations defining this flexible trajectory are presented in detail. The sampling efficiencies of Yarnball and 3D Cones were compared through point spread function analysis and simulated imaging (which highlights undersampling in the absence of other scanning effects). The feasibility of Yarnball implementation was demonstrated for fully sampled T1 -weighted images of the human head at 3 T. RESULTS The mostly large 3D loops of the Yarnball trajectory facilitate rapid sampling under peripheral nerve stimulation constraint, an advantage that increases with readout duration (TRO ). Point spread function analysis yielded 89% (TRO = 2 ms) and 77% (TRO = 10 ms) of Yarnball voxels with magnitude less than 0.01% of the point spread function peak. For 3D Cones, these values were only 52% and 29%. The 3D-Cones technique required 1.4 times (TRO = 2 ms) and 1.8 times (TRO = 10 ms) more trajectories than Yarnball to produce simulated images of a sphere free from undersampling artifact. For a prolate spheroidal (head-like) object, 1.75 times and 2.6 times more trajectories were required for 3D Cones. Yarnball produced 0.72 mm (1/2kmax ) isotropic T1 -weighted human brain images free from undersampling artifact in only 98 seconds at 3 T. CONCLUSION Yarnball demonstrated greater k-space sampling efficiency than directly comparable 3D Cones, and may have value wherever 3D Cones has been considered. Yarnball may also have value in the context of rapid T1 -weighted brain imaging.
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Affiliation(s)
- Robert W Stobbe
- Department of Biomedical Engineering, Faculty of Medicine and Dentistry, 1098 Research Transition Facility, University of Alberta, Edmonton, Alberta, Canada
| | - Christian Beaulieu
- Department of Biomedical Engineering, Faculty of Medicine and Dentistry, 1098 Research Transition Facility, University of Alberta, Edmonton, Alberta, Canada
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21
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Ma YJ, Jerban S, Jang H, Chang D, Chang EY, Du J. Quantitative Ultrashort Echo Time (UTE) Magnetic Resonance Imaging of Bone: An Update. Front Endocrinol (Lausanne) 2020; 11:567417. [PMID: 33071975 PMCID: PMC7531487 DOI: 10.3389/fendo.2020.567417] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Accepted: 08/17/2020] [Indexed: 12/24/2022] Open
Abstract
Bone possesses a highly complex hierarchical structure comprised of mineral (~45% by volume), organic matrix (~35%) and water (~20%). Water exists in bone in two forms: as bound water (BW), which is bound to bone mineral and organic matrix, or as pore water (PW), which resides in Haversian canals as well as in lacunae and canaliculi. Magnetic resonance (MR) imaging has been increasingly used for assessment of cortical and trabecular bone. However, bone appears as a signal void on conventional MR sequences because of its short T2*. Ultrashort echo time (UTE) sequences with echo times (TEs) 100-1,000 times shorter than those of conventional sequences allow direct imaging of BW and PW in bone. A series of quantitative UTE MRI techniques has been developed for bone evaluation. UTE and adiabatic inversion recovery prepared UTE (IR-UTE) sequences have been developed to quantify BW and PW. UTE magnetization transfer (UTE-MT) sequences have been developed to quantify collagen backbone protons, and UTE quantitative susceptibility mapping (UTE-QSM) sequences have been developed to assess bone mineral.
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Affiliation(s)
- Ya-Jun Ma
- Department of Radiology, University of California, San Diego, San Diego, CA, United States
| | - Saeed Jerban
- Department of Radiology, University of California, San Diego, San Diego, CA, United States
| | - Hyungseok Jang
- Department of Radiology, University of California, San Diego, San Diego, CA, United States
| | - Douglas Chang
- Department of Orthopedic Surgery, University of California, San Diego, San Diego, CA, United States
| | - Eric Y. Chang
- Department of Radiology, University of California, San Diego, San Diego, CA, United States
- Research Service, Veterans Affairs San Diego Healthcare System, San Diego, CA, United States
| | - Jiang Du
- Department of Radiology, University of California, San Diego, San Diego, CA, United States
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22
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Jerban S, Ma Y, Wei Z, Jang H, Chang EY, Du J. Quantitative Magnetic Resonance Imaging of Cortical and Trabecular Bone. Semin Musculoskelet Radiol 2020; 24:386-401. [PMID: 32992367 DOI: 10.1055/s-0040-1710355] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Bone is a composite material consisting of mineral, organic matrix, and water. Water in bone can be categorized as bound water (BW), which is bound to bone mineral and organic matrix, or as pore water (PW), which resides in Haversian canals as well as in lacunae and canaliculi. Bone is generally classified into two types: cortical bone and trabecular bone. Cortical bone is much denser than trabecular bone that is surrounded by marrow and fat. Magnetic resonance (MR) imaging has been increasingly used for noninvasive assessment of both cortical bone and trabecular bone. Bone typically appears as a signal void with conventional MR sequences because of its short T2*. Ultrashort echo time (UTE) sequences with echo times 100 to 1,000 times shorter than those of conventional sequences allow direct imaging of BW and PW in bone. This article summarizes several quantitative MR techniques recently developed for bone evaluation. Specifically, we discuss the use of UTE and adiabatic inversion recovery prepared UTE sequences to quantify BW and PW, UTE magnetization transfer sequences to quantify collagen backbone protons, UTE quantitative susceptibility mapping sequences to assess bone mineral, and conventional sequences for high-resolution imaging of PW as well as the evaluation of trabecular bone architecture.
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Affiliation(s)
- Saeed Jerban
- Department of Radiology, University of California, San Diego, California
| | - Yajun Ma
- Department of Radiology, University of California, San Diego, California
| | - Zhao Wei
- Department of Radiology, University of California, San Diego, California
| | - Hyungseok Jang
- Department of Radiology, University of California, San Diego, California
| | - Eric Y Chang
- Department of Radiology, University of California, San Diego, California.,Research Service, Veterans Affairs San Diego Healthcare System, San Diego, California
| | - Jiang Du
- Department of Radiology, University of California, San Diego, California
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23
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Jerban S, Ma Y, Jang H, Namiranian B, Le N, Shirazian H, Murphy ME, Du J, Chang EY. Water proton density in human cortical bone obtained from ultrashort echo time (UTE) MRI predicts bone microstructural properties. Magn Reson Imaging 2020; 67:85-89. [PMID: 31931112 DOI: 10.1016/j.mri.2020.01.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Revised: 01/08/2020] [Accepted: 01/10/2020] [Indexed: 12/16/2022]
Abstract
PURPOSE To investigate the correlations between cortical bone microstructural properties and total water proton density (TWPD) obtained from three-dimensional ultrashort echo time Cones (3D-UTE-Cones) magnetic resonance imaging techniques. MATERIALS AND METHODS 135 cortical bone samples were harvested from human tibial and femoral midshafts of 37 donors (61 ± 24 years old). Samples were scanned using 3D-UTE-Cones sequences on a clinical 3T MRI and on a high-resolution micro-computed tomography (μCT) scanner. TWPD was measured using 3D-UTE-Cones MR images. Average bone porosity, pore size, and bone mineral density (BMD) were measured from μCT images at 9 μm voxel size. Pearson's correlation coefficients between TWPD and μCT-based measures were calculated. RESULTS TWPD showed significant moderate correlation with both average bone porosity (R = 0.66, p < 0.01) and pore size (R = 0.57, p < 0.01). TWPD also showed significant strong correction with BMD (R = 0.71, p < 0.01). CONCLUSIONS The presented 3D-UTE-Cones imaging technique allows assessment of TWPD in human cortical bone. This quick UTE-MRI-based technique was capable of predicting bone microstructure differences with significant correlations. Such correlations highlight the potential of UTE-MRI-based measurement of bone water proton density to assess bone microstructure.
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Affiliation(s)
- Saeed Jerban
- Department of Radiology, University of California, San Diego, La Jolla, CA, USA.
| | - Yajun Ma
- Department of Radiology, University of California, San Diego, La Jolla, CA, USA
| | - Hyungseok Jang
- Department of Radiology, University of California, San Diego, La Jolla, CA, USA
| | - Behnam Namiranian
- Department of Radiology, University of California, San Diego, La Jolla, CA, USA
| | - Nicole Le
- Research Service, Veterans Affairs San Diego Healthcare System, San Diego, La Jolla, CA, USA
| | - Hoda Shirazian
- Department of Radiology, University of California, San Diego, La Jolla, CA, USA
| | - Mark E Murphy
- Orthopedic Surgery Service, Veterans Affairs San Diego Healthcare System, San Diego, La Jolla, CA, USA
| | - Jiang Du
- Department of Radiology, University of California, San Diego, La Jolla, CA, USA
| | - Eric Y Chang
- Research Service, Veterans Affairs San Diego Healthcare System, San Diego, La Jolla, CA, USA; Department of Radiology, University of California, San Diego, La Jolla, CA, USA.
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24
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Jerban S, Chang DG, Ma Y, Jang H, Chang EY, Du J. An Update in Qualitative Imaging of Bone Using Ultrashort Echo Time Magnetic Resonance. Front Endocrinol (Lausanne) 2020; 11:555756. [PMID: 33117275 PMCID: PMC7551122 DOI: 10.3389/fendo.2020.555756] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Accepted: 09/11/2020] [Indexed: 12/31/2022] Open
Abstract
Bone is comprised of mineral, collagenous organic matrix, and water. X-ray-based techniques are the standard approach for bone evaluation in clinics, but they are unable to detect the organic matrix and water components in bone. Magnetic resonance imaging (MRI) is being used increasingly for bone evaluation. While MRI can non-invasively assess the proton pools in soft tissues, cortical bone typically appears as a signal void with clinical MR techniques because of its short T2*. New MRI techniques have been recently developed to image bone while avoiding the ionizing radiation present in x-ray-based methods. Qualitative bone imaging can be achieved using ultrashort echo time (UTE), single inversion recovery UTE (IR-UTE), dual-inversion recovery UTE (Dual-IR-UTE), double-inversion recovery UTE (Double-IR-UTE), and zero echo time (ZTE) sequences. The contrast mechanisms as well as the advantages and disadvantages of each technique are discussed.
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Affiliation(s)
- Saeed Jerban
- Department of Radiology, University of California, San Diego, San Diego, CA, United States
| | - Douglas G. Chang
- Departments of Orthopaedic Surgery, University of California, San Diego, San Diego, CA, United States
| | - Yajun Ma
- Department of Radiology, University of California, San Diego, San Diego, CA, United States
| | - Hyungseok Jang
- Department of Radiology, University of California, San Diego, San Diego, CA, United States
| | - Eric Y. Chang
- Department of Radiology, University of California, San Diego, San Diego, CA, United States
- Research Service, Veterans Affairs San Diego Healthcare System, San Diego, CA, United States
| | - Jiang Du
- Department of Radiology, University of California, San Diego, San Diego, CA, United States
- *Correspondence: Jiang Du,
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