Richard Souza, PhD, PT

Associate Professor in Resid.


Richard Souza, PT, PhD, is the Vice Chair for Research and Professor in the Department of Physical Therapy and Rehabilitation Science, with joint appointment in the Departments of Radiology and Biomedical and Orthopaedic Surgery. He is the Program Director for the PhD in Rehabilitation Science and the Director of Research of the Human Performance Center at the University of California, San Francisco. Dr. Souza obtained his BS in Exercise Science from the University of California, Davis in 1998, and he received his MPT in Physical Therapy from Samuel Merritt College, Oakland in 2002. He earned his PhD in Biokinesiology from the University of Southern California in 2008, followed by a postdoctoral fellowship in Biomedical Imaging from the University of California, San Francisco in 2009.

Dr. Souza’s research interests are focused on the relationships between mechanics of human movement and development and progression of knee and hip osteoarthritis. Presently, he is involved in projects that evaluate the influence of loading behavior on cartilage health and determining effectiveness of prevention and rehabilitation strategies on joint health using advanced quantitative magnetic resonance imaging of the hip and knee. Dr. Souza’s future research goals include combining his background in biomechanics and motion analysis with advanced quantitative imaging techniques to identify new therapeutic targets that can be used to slow or prevent hip and knee osteoarthritis. He has 85 published manuscripts and he has written more than 130 peer-reviewed abstracts. Dr. Souza's research is funded by the National Institutes of Health.

Dr. Souza is also part of the UCSF RunSafe team, a program which is offered to all runners or walkers interested in a comprehensive evaluation of gait mechanics, strength and flexibility, foot structure and footwear choices, and nutritional approaches. In the RunSafe clinic, Dr. Souza collaborates with physicians, biomechanists, physical therapists, engineers, nutritionists, orthotists, and athletic trainers.


Physical therapy, orthopaedic diseases, knee

Professional Interests:
Injury mechanics, rehabilitation, lower extremity biomechanics, injury prevention, osteoarthritis, medical imaging, dynamic magnetic resonance imaging, motion analysis, quantitative imaging

Education and Training:
• Bachelor of Science: University of California, Davis - Exercise Science
• Masters of Physical Therapy: Samuel Merritt College, Oakland - Physical Therapy
• Doctor of Philosophy: University of Southern California - Biokinesiology
• Postdoctoral Fellow: University of California, San Francisco - Biomedical Imaging


2018 - Diversity, Equity, and Inclusion Champion Training, University of California

Honors and Awards

Eugene Michels New Investigator Award, American Physical Therapy Association, 2014
George J. Davies - James A. Gould Excellence in Clinical Inquiry Award, Journal of Orthopaedic and Sports Physical Therapy, 2012
Faculty Publication Award, California Physical Therapy Association, 2011
Outstanding Poster Award at Annual Meeting, California Physical Therapy Association, 2010
American Recovery and Reinvestment Act Faculty Hire, NIHNational Institute of Arthritis and Musculoskeletal and Skin Diseases, 2010
Student Research Publication Award, California Physical Therapy Association, 2009
Student Research Award, American College of Sports Medicine, Biomechanics Interest Group, 2008
The Dean’s Research Award, Best overall outstanding presentation at USC Research Day, 2008
USC Research Day; 1st Place, Biokinesiology and Physical Therapy, USC, 2008
Outstanding Presentation Award, Southern California Conference of Biomechanics, 2008
Order of the Golden Cane, USC, Dept. Biokinesiology and Physical Therapy, 2008
Promotion of Doctoral Students (PODS II) Scholarship, Foundation for Physical Therapy, 2007
Outstanding Teaching Award, University of Southern California, 2007
Promotion of Doctoral Students (PODS II) Scholarship, Foundation for Physical Therapy, 2006
Jacqueline Perry Scholarship Award, USC, Dept. of Biokinesiology and Physical Therapy, 2006
Outstanding Mentorship Award, USC, Dept. of Biokinesiology and Physical Therapy, 2006
Outstanding Presentation Award, Southern California Conference of Biomechanics, 2005
Promotion of Doctoral Students (PODS I) Scholarship, Foundation for Physical Therapy, 2004
Outstanding Student Award, Samuel Merritt College, Dept. of Physical Therapy, 2002
Physical Therapy Professional Education Scholarship, California Physical Therapy Association, 2001
Dick Lewis Award, University of California, Davis Athletic Training Program, 2001


Schirò S, Foreman SC, Joseph GB, Souza RB, McCulloch CE, Nevitt MC, Link TM. Impact of different physical activity types on knee joint structural degeneration assessed with 3-T MRI in overweight and obese subjects: data from the osteoarthritis initiative. Skeletal Radiol. 2021 Jan 06.
Friedman JM, Su F, Zhang AL, Allen CR, Feeley BT, Souza R, Li X, Ma CB, Lansdown DA. Patient-Reported Activity Levels Correlate With Early Cartilage Degeneration After Anterior Cruciate Ligament Reconstruction. Am J Sports Med. 2021 Jan 04; 363546520980431.
Heerey JJ, Srinivasan R, Agricola R, Smith A, Kemp JL, Pizzari T, King MG, Lawrenson PR, Scholes MJ, Souza RB, Link T, Majumdar S, Crossley KM. Prevalence of early hip OA features on MRI in high-impact athletes. The femoroacetabular impingement and hip osteoarthritis cohort (FORCe) study. Osteoarthritis Cartilage. 2020 Dec 30.
Tibrewala R, Pedoia V, Lee J, Kinnunen C, Popovic T, Zhang AL, Link TM, Souza RB, Majumdar S. Automatic Hip Abductor Muscle Fat Fraction Estimation and Association with Early OA Cartilage Degeneration Biomarkers. J Orthop Res. 2020 Dec 25.
Roach KE, Pedoia V, Lee JJ, Popovic T, Link TM, Majumdar S, Souza RB. Multivariate functional principal component analysis identifies waveform features of gait biomechanics related to early-to-moderate hip osteoarthritis. J Orthop Res. 2020 Dec 07.
Liao TC, Jergas H, Tibrewala R, Bahroos E, Link TM, Majumdar S, Souza RB, Pedoia V. Longitudinal analysis of the contribution of 3D patella and trochlear bone shape on patellofemoral joint osteoarthritic features. J Orthop Res. 2020 Aug 22.
Liao TC, Martinez AGM, Pedoia V, Ma BC, Li X, Link TM, Majumdar S, Souza RB. Patellar Malalignment Is Associated With Patellofemoral Lesions and Cartilage Relaxation Times After Hamstring Autograft Anterior Cruciate Ligament Reconstruction. Am J Sports Med. 2020 07; 48(9):2242-2251.
Shaw C, Warwick H, Nguyen KH, Link TM, Majumdar S, Souza RB, Vail TP, Zhang AL. Correlation of hip capsule morphology with patient symptoms from femoroacetabular impingement. J Orthop Res. 2020 Jun 27.
Espinosa SE, Costello KE, Souza RB, Kumar D. Lower knee extensor and flexor strength is associated with varus thrust in people with knee osteoarthritis. J Biomech. 2020 Jun 23; 107:109865.
Li AK, Ochoa JK, Pedoia V, Amano K, Souza RB, Li X, Ma CB. Altered tibiofemoral position following ACL reconstruction is associated with cartilage matrix changes: A voxel-based relaxometry analysis. J Orthop Res. 2020 Nov; 38(11):2454-2463.
Popovic T, Samaan MA, Link TM, Majumdar S, Souza RB. Patients with Symptomatic Hip Osteoarthritis Have Altered Kinematics during Stair Ambulation. PM R. 2020 May 07.
Kumar D, Link TM, Jafarzadeh SR, LaValley MP, Majumdar S, Souza RB. Quadriceps adiposity is associated with increase in lesions of the knee cartilage, meniscus, or bone marrow over 3-years. Arthritis Care Res (Hoboken). 2020 Apr 27.
Tibrewala R, Ozhinsky E, Shah R, Flament I, Crossley K, Srinivasan R, Souza R, Link TM, Pedoia V, Majumdar S. Computer-Aided Detection AI Reduces Interreader Variability in Grading Hip Abnormalities With MRI. J Magn Reson Imaging. 2020 10; 52(4):1163-1172.
Shimizu T, Markes AR, Samaan MA, Tanaka MS, Souza RB, Li X, Ma CB. Patients With Abnormal Limb Kinetics at 6 Months After Anterior Cruciate Ligament Reconstruction Have an Increased Risk of Persistent Medial Meniscal Abnormality at 3 Years. Orthop J Sports Med. 2020 Jan; 8(1):2325967119895248.
Li AK, Pedoia V, Tanaka M, Souza RB, Ma CB, Li X. Six-month post-surgical elevations in cartilage T1rho relaxation times are associated with functional performance 2 years after ACL reconstruction. J Orthop Res. 2020 05; 38(5):1132-1140.
Samaan MA, Grace T, Zhang AL, Majumdar S, Souza RB. Short term outcomes of hip arthroscopy on hip joint mechanics and cartilage health in patients with femoroacetabular impingement syndrome. Clin Biomech (Bristol, Avon). 2020 01; 71:214-220.
Foreman SC, Zhang AL, Neumann J, von Schacky CE, Souza RB, Majumdar S, Link TM. Postoperative MRI Findings and Associated Pain Changes After Arthroscopic Surgery for Femoroacetabular Impingement. AJR Am J Roentgenol. 2020 01; 214(1):177-184.
Liao TC, Pedoia V, Neumann J, Link TM, Souza RB, Majumdar S. Extracting Voxel-Based Cartilage Relaxometry Features in Hip Osteoarthritis Subjects Using Principal Component Analysis. J Magn Reson Imaging. 2020 06; 51(6):1708-1719.
Liao TC, Samaan MA, Popovic T, Neumann J, Zhang AL, Link TM, Majumdar S, Souza RB. Abnormal Joint Loading During Gait in Persons With Hip Osteoarthritis Is Associated With Symptoms and Cartilage Lesions. J Orthop Sports Phys Ther. 2019 12; 49(12):917-924.
Liao TC, Teng HL, Link TM, Majumdar S, Souza RB. Association Between Gait Kinetics and Symptomatic Progression in Persons With Patellofemoral With/Without Concurrent Tibiofemoral Osteoarthritis. J Orthop Res. 2019 12; 37(12):2593-2600.
Shimizu T, Cheng Z, Samaan MA, Tanaka MS, Souza RB, Li X, Ma CB. Increases in Joint Laxity After Anterior Cruciate Ligament Reconstruction Are Associated With Sagittal Biomechanical Asymmetry. Arthroscopy. 2019 07; 35(7):2072-2079.
Mah CD, Sparks AJ, Samaan MA, Souza RB, Luke A. Sleep restriction impairs maximal jump performance and joint coordination in elite athletes. J Sports Sci. 2019 Sep; 37(17):1981-1988.
Wan C, Ge L, Souza RB, Tang SY, Alliston T, Hao Z, Li X. T1?-based fibril-reinforced poroviscoelastic constitutive relation of human articular cartilage using inverse finite element technology. Quant Imaging Med Surg. 2019 Mar; 9(3):359-370.
Samaan MA, Zhang AL, Popovic T, Pedoia V, Majumdar S, Souza RB. Hip joint muscle forces during gait in patients with femoroacetabular impingement syndrome are associated with patient reported outcomes and cartilage composition. J Biomech. 2019 02 14; 84:138-146.
Bolcos PO, Mononen ME, Mohammadi A, Ebrahimi M, Tanaka MS, Samaan MA, Souza RB, Li X, Suomalainen JS, Jurvelin JS, Töyräs J, Korhonen RK. Comparison between kinetic and kinetic-kinematic driven knee joint finite element models. Sci Rep. 2018 11 26; 8(1):17351.
Shimizu T, Samaan MA, Tanaka MS, Pedoia V, Souza RB, Li X, Ma CB. Abnormal Biomechanics at 6 Months Are Associated With Cartilage Degeneration at 3 Years After Anterior Cruciate Ligament Reconstruction. Arthroscopy. 2019 02; 35(2):511-520.
Inamdar G, Pedoia V, Rossi-Devries J, Samaan MA, Link TM, Souza RB, Majumdar S. MR study of longitudinal variations in proximal femur 3D morphological shape and associations with cartilage health in hip osteoarthritis. J Orthop Res. 2019 01; 37(1):161-170.
Grace T, Neumann J, Samaan MA, Souza RB, Majumdar S, Link TM, Zhang AL. Using the Scoring Hip Osteoarthritis with Magnetic Resonance Imaging (SHOMRI) system to assess intra-articular pathology in femoroacetabular impingement. J Orthop Res. 2018 11; 36(11):3064-3070.
Neumann J, Zhang AL, Schwaiger BJ, Samaan MA, Souza R, Foreman SC, Joseph GB, Grace T, Majumdar S, Link TM. Validation of scoring hip osteoarthritis with MRI (SHOMRI) scores using hip arthroscopy as a standard of reference. Eur Radiol. 2019 Feb; 29(2):578-587.
Grace T, Samaan MA, Souza RB, Link TM, Majumdar S, Zhang AL. Correlation of Patient Symptoms With Labral and Articular Cartilage Damage in Femoroacetabular Impingement. Orthop J Sports Med. 2018 Jun; 6(6):2325967118778785.
Chen E, Amano K, Pedoia V, Souza RB, Ma CB, Li X. Longitudinal analysis of tibiofemoral cartilage contact area and position in ACL reconstructed patients. J Orthop Res. 2018 10; 36(10):2718-2727.
Rossi-deVries J, Pedoia V, Samaan MA, Ferguson AR, Souza RB, Majumdar S. Using multidimensional topological data analysis to identify traits of hip osteoarthritis. J Magn Reson Imaging. 2018 10; 48(4):1046-1058.
Running does not increase symptoms or structural progression in people with knee osteoarthritis: data from the osteoarthritis initiative. Clin Rheumatol. 2018 Sep; 37(9):2497-2504.
Baker RL, Souza RB, Rauh MJ, Fredericson M, Rosenthal MD. Differences in Knee and Hip Adduction and Hip Muscle Activation in Runners With and Without Iliotibial Band Syndrome. PM R. 2018 10; 10(10):1032-1039.
Teng HL, Pedoia V, Link TM, Majumdar S, Souza RB. Local associations between knee cartilage T1? and T2 relaxation times and patellofemoral joint stress during walking: A voxel-based relaxometry analysis. Knee. 2018 Jun; 25(3):406-416.
Heerey JJ, Kemp JL, Mosler AB, Jones DM, Pizzari T, Souza RB, Crossley KM. What is the prevalence of imaging-defined intra-articular hip pathologies in people with and without pain? A systematic review and meta-analysis. Br J Sports Med. 2018 May; 52(9):581-593.
Femoroacetabular impingement and hip OsteoaRthritis Cohort (FORCe): protocol for a prospective study. J Physiother. 2018 01; 64(1):55.
Kumar D, Su F, Wu D, Pedoia V, Heitkamp L, Ma CB, Souza RB, Li X. Frontal Plane Knee Mechanics and Early Cartilage Degeneration in People With Anterior Cruciate Ligament Reconstruction: A Longitudinal Study. Am J Sports Med. 2018 02; 46(2):378-387.
Kumar D, Wyatt C, Lee S, Okazaki N, Chiba K, Link TM, Souza RB, Majumdar S. Sagittal plane walking patterns are related to MRI changes over 18-months in people with and without mild-moderate hip osteoarthritis. J Orthop Res. 2018 05; 36(5):1472-1477.
iPhone Sensors in Tracking Outcome Variables of the 30-Second Chair Stand Test and Stair Climb Test to Evaluate Disability: Cross-Sectional Pilot Study. JMIR Mhealth Uhealth. 2017 Oct 27; 5(10):e166.
Lansdown DA, Pedoia V, Zaid M, Amano K, Souza RB, Li X, Ma CB. Variations in Knee Kinematics After ACL Injury and After Reconstruction Are Correlated With Bone Shape Differences. Clin Orthop Relat Res. 2017 Oct; 475(10):2427-2435.
Gait Characteristics Associated With a Greater Increase in Medial Knee Cartilage T1? and T2 Relaxation Times in Patients Undergoing Anterior Cruciate Ligament Reconstruction. Am J Sports Med. 2017 Dec; 45(14):3262-3271.
A novel mr-based method for detection of cartilage delamination in femoroacetabular impingement patients. J Orthop Res. 2018 03; 36(3):971-978.
Study of the interactions between proximal femur 3d bone shape, cartilage health, and biomechanics in patients with hip Osteoarthritis. J Orthop Res. 2018 01; 36(1):330-341.
Biomechanical Factors Associated With Pain and Symptoms Following Anterior Cruciate Ligament Injury and Reconstruction. PM R. 2018 01; 10(1):56-63.
MRI and biomechanics multidimensional data analysis reveals R2 -R1? as an early predictor of cartilage lesion progression in knee osteoarthritis. J Magn Reson Imaging. 2018 01; 47(1):78-90.
Cyclops lesions are associated with altered gait patterns and medial knee joint cartilage degeneration at 1 year after ACL-reconstruction. J Orthop Res. 2017 10; 35(10):2275-2281.
Is There an Association Between a History of Running and Symptomatic Knee Osteoarthritis? A Cross-Sectional Study From the Osteoarthritis Initiative. Arthritis Care Res (Hoboken). 2017 Feb; 69(2):183-191.
Axial traction magnetic resonance imaging (MRI) of the glenohumeral joint in healthy volunteers: initial experience. Clin Imaging. 2017 Mar - Apr; 42:178-182.
Joint Loading in the Sagittal Plane During Gait Is Associated With Hip Joint Abnormalities in Patients With Femoroacetabular Impingement. Am J Sports Med. 2017 Mar; 45(4):810-818.
Cross-sectional and longitudinal study of the impact of posterior meniscus horn lesions on adjacent cartilage composition, patient-reported outcomes and gait biomechanics in subjects without radiographic osteoarthritis. Osteoarthritis Cartilage. 2017 05; 25(5):708-717.
Abnormal Joint Moment Distributions and Functional Performance During Sit-to-Stand in Femoroacetabular Impingement Patients. PM R. 2017 Jun; 9(6):563-570.
Analysis of the articular cartilage T1? and T2 relaxation times changes after ACL reconstruction in injured and contralateral knees and relationships with bone shape. J Orthop Res. 2017 03; 35(3):707-717.
Longitudinal study using voxel-based relaxometry: Association between cartilage T1? and T2 and patient reported outcome changes in hip osteoarthritis. J Magn Reson Imaging. 2017 05; 45(5):1523-1533.
Role of thigh muscle cross-sectional area and strength in progression of knee cartilage degeneration over 48 months - data from the Osteoarthritis Initiative. Osteoarthritis Cartilage. 2016 12; 24(12):2082-2091.
Loaded versus unloaded magnetic resonance imaging (MRI) of the knee: Effect on meniscus extrusion in healthy volunteers and patients with osteoarthritis. Eur J Radiol Open. 2016; 3:100-7.
Quantitative magnetic resonance arthrography in patients with femoroacetabular impingement. J Magn Reson Imaging. 2016 12; 44(6):1539-1545.
Persistent Biomechanical Alterations After ACL Reconstruction Are Associated With Early Cartilage Matrix Changes Detected by Quantitative MR. Orthop J Sports Med. 2016 Apr; 4(4):2325967116644421.
Associations between patellofemoral joint cartilage T1? and T2 and knee flexion moment and impulse during gait in individuals with and without patellofemoral joint osteoarthritis. Osteoarthritis Cartilage. 2016 09; 24(9):1554-64.
Longitudinal assessment of MRI in hip osteoarthritis using SHOMRI and correlation with clinical progression. Semin Arthritis Rheum. 2016 06; 45(6):648-55.
T1? and T2 relaxation times are associated with progression of hip osteoarthritis. Osteoarthritis Cartilage. 2016 08; 24(8):1399-407.
Inter- and intra-rater reliability of patellofemoral kinematic and contact area quantification by fast spin echo MRI and correlation with cartilage health by quantitative T1? MRI. Knee. 2016 Jan; 23(1):13-9.
An Evidence-Based Videotaped Running Biomechanics Analysis. Phys Med Rehabil Clin N Am. 2016 Feb; 27(1):217-36.
Training in ChiRunning to reduce blood pressure: a randomized controlled pilot study. BMC Complement Altern Med. 2015 Oct 15; 15:368.
Zonal differences in meniscus MR relaxation times in response to in vivo static loading in knee osteoarthritis. J Orthop Res. 2016 Feb; 34(2):249-61.
Acetabular cartilage defects cause altered hip and knee joint coordination variability during gait. Clin Biomech (Bristol, Avon). 2015 Dec; 30(10):1202-9.
Are There Sex Differences in Knee Cartilage Composition and Walking Mechanics in Healthy and Osteoarthritis Populations? Clin Orthop Relat Res. 2015 Aug; 473(8):2548-58.
Higher Knee Flexion Moment During the Second Half of the Stance Phase of Gait Is Associated With the Progression of Osteoarthritis of the Patellofemoral Joint on Magnetic Resonance Imaging. J Orthop Sports Phys Ther. 2015 Sep; 45(9):656-64.
Three-dimensional MRI-based statistical shape model and application to a cohort of knees with acute ACL injury. Osteoarthritis Cartilage. 2015 Oct; 23(10):1695-703.
Cartilage T1? and T2 Relaxation Times in Patients With Mild-to-Moderate Radiographic Hip Osteoarthritis. Arthritis Rheumatol. 2015 Jun; 67(6):1548-56.
Abnormal tibial position is correlated to early degenerative changes one year following ACL reconstruction. J Orthop Res. 2015 Jul; 33(7):1079-86.
Medial and Lateral Heel Whips: Prevalence and Characteristics in Recreational Runners. PM R. 2015 Aug; 7(8):823-830.
Individuals with isolated patellofemoral joint osteoarthritis exhibit higher mechanical loading at the knee during the second half of the stance phase. Clin Biomech (Bristol, Avon). 2015 May; 30(4):383-90.
Anatomic correlates of reduced hip extension during walking in individuals with mild-moderate radiographic hip osteoarthritis. J Orthop Res. 2015 Apr; 33(4):527-34.
Effects of Form-Focused Training on Running Biomechanics: A Pilot Randomized Trial in Untrained Individuals. PM R. 2015 Aug; 7(8):814-822.
Reproducibility measurements of three methods for calculating in vivo MR-based knee kinematics. J Magn Reson Imaging. 2015 Aug; 42(2):533-8.
A comprehensive in vivo kinematic, quantitative MRI and functional evaluation following ACL reconstruction--A comparison between mini-two incision and anteromedial portal femoral tunnel drilling. Knee. 2015 Dec; 22(6):547-53.
Physical activity and spatial differences in medial knee T1rho and t2 relaxation times in knee osteoarthritis. J Orthop Sports Phys Ther. 2014 Dec; 44(12):964-72.
Magnetic resonance analysis of loaded meniscus deformation: a novel technique comparing participants with and without radiographic knee osteoarthritis. Skeletal Radiol. 2015 Jan; 44(1):125-35.
Scoring hip osteoarthritis with MRI (SHOMRI): A whole joint osteoarthritis evaluation system. J Magn Reson Imaging. 2015 Jun; 41(6):1549-57.
Frontal plane knee mechanics and medial cartilage MR relaxation times in individuals with ACL reconstruction: A pilot study. Knee. 2014 Oct; 21(5):881-5.
Cartilage MRI relaxation times after arthroscopic partial medial meniscectomy reveal localized degeneration. Knee Surg Sports Traumatol Arthrosc. 2015 Jan; 23(1):188-97.
Response of knee cartilage T1rho and T2 relaxation times to in vivo mechanical loading in individuals with and without knee osteoarthritis. Osteoarthritis Cartilage. 2014 Oct; 22(10):1367-76.
Patellofemoral joint stress during weight-bearing and non-weight-bearing quadriceps exercises. J Orthop Sports Phys Ther. 2014 May; 44(5):320-7.
Differences in the association of hip cartilage lesions and cam-type femoroacetabular impingement with movement patterns: a preliminary study. PM R. 2014 Aug; 6(8):681-9.
Quadriceps intramuscular fat fraction rather than muscle size is associated with knee osteoarthritis. Osteoarthritis Cartilage. 2014 Feb; 22(2):226-34.
Changes in MR relaxation times of the meniscus with acute loading: an in vivo pilot study in knee osteoarthritis. J Magn Reson Imaging. 2015 Feb; 41(2):536-43.
Quadriceps and hamstrings morphology is related to walking mechanics and knee cartilage MRI relaxation times in young adults. J Orthop Sports Phys Ther. 2013 Dec; 43(12):881-90.
Differences between X-ray and MRI-determined knee cartilage thickness in weight-bearing and non-weight-bearing conditions. Osteoarthritis Cartilage. 2013 Dec; 21(12):1876-85.
Association of cartilage defects, and other MRI findings with pain and function in individuals with mild-moderate radiographic hip osteoarthritis and controls. Osteoarthritis Cartilage. 2013 Nov; 21(11):1685-92.
Simultaneous acquisition of T1? and T2 quantification in knee cartilage: repeatability and diurnal variation. J Magn Reson Imaging. 2014 May; 39(5):1287-93.
T1? imaging demonstrates early changes in the lateral patella in patients with patellofemoral pain and maltracking. Am J Sports Med. 2013 Aug; 41(8):1813-8.
Bone marrow changes related to disuse. Eur Radiol. 2013 Dec; 23(12):3422-31.
T1rho MRI relaxation in knee OA subjects with varying sizes of cartilage lesions. Knee. 2013 Mar; 20(2):113-9.
Loading of the knee during 3.0T MRI is associated with significantly increased medial meniscus extrusion in mild and moderate osteoarthritis. Eur J Radiol. 2012 Aug; 81(8):1839-45.
The acute effect of running on knee articular cartilage and meniscus magnetic resonance relaxation times in young healthy adults. Am J Sports Med. 2012 Sep; 40(9):2134-41.
The influence of hip abductor muscle performance on dynamic postural stability in females with patellofemoral pain. Gait Posture. 2012 Jul; 36(3):425-9.
Effects of unloading on knee articular cartilage T1rho and T2 magnetic resonance imaging relaxation times: a case series. J Orthop Sports Phys Ther. 2012 Jun; 42(6):511-20.
Non-traumatic anterior cruciate ligament abnormalities and their relationship to osteoarthritis using morphological grading and cartilage T2 relaxation times: data from the Osteoarthritis Initiative (OAI). Skeletal Radiol. 2012 Nov; 41(11):1435-43.
Evaluating rotational kinematics of the knee in ACL-ruptured and healthy patients using 3.0 Tesla magnetic resonance imaging. Knee Surg Sports Traumatol Arthrosc. 2012 Apr; 20(4):663-70.
Association of MR relaxation and cartilage deformation in knee osteoarthritis. J Orthop Res. 2012 Jun; 30(6):919-26.
Relationship between knee kinetics during jumping tasks and knee articular cartilage MRI T1rho and T2 relaxation times. Clin Biomech (Bristol, Avon). 2012 May; 27(4):403-8.
In vivo tibiofemoral cartilage-to-cartilage contact area of females with medial osteoarthritis under acute loading using MRI. J Magn Reson Imaging. 2011 Dec; 34(6):1405-13.
Hovis KK, Stehling C, Souza RB, Haughom BD, Baum T, Nevitt M, McCulloch C, Lynch JA, Link TM. Physical activity is associated with magnetic resonance imaging-based knee cartilage T2 measurements in asymptomatic subjects with and those without osteoarthritis risk factors. Arthritis Rheum. 2011 Aug; 63(8):2248-56.
Haughom B, Schairer W, Souza RB, Carpenter D, Ma CB, Li X. Abnormal tibiofemoral kinematics following ACL reconstruction are associated with early cartilage matrix degeneration measured by MRI T1rho. Knee. 2012 Aug; 19(4):482-7.
Baker RL, Souza RB, Fredericson M. Iliotibial band syndrome: soft tissue and biomechanical factors in evaluation and treatment. PM R. 2011 Jun; 3(6):550-61.
Cotofana S, Eckstein F, Wirth W, Souza RB, Li X, Wyman B, Hellio-Le Graverand MP, Link T, Majumdar S. In vivo measures of cartilage deformation: patterns in healthy and osteoarthritic female knees using 3T MR imaging. Eur Radiol. 2011 Jun; 21(6):1127-35.
Tang SY, Souza RB, Ries M, Hansma PK, Alliston T, Li X. Local tissue properties of human osteoarthritic cartilage correlate with magnetic resonance T(1) rho relaxation times. J Orthop Res. 2011 Sep; 29(9):1312-9.
Souza RB, Stehling C, Wyman BT, Hellio Le Graverand MP, Li X, Link TM, Majumdar S. The effects of acute loading on T1rho and T2 relaxation times of tibiofemoral articular cartilage. Osteoarthritis Cartilage. 2010 Dec; 18(12):1557-63.
Sorenson SC, Arya S, Souza RB, Pollard CD, Salem GJ, Kulig K. Knee extensor dynamics in the volleyball approach jump: the influence of patellar tendinopathy. J Orthop Sports Phys Ther. 2010 Sep; 40(9):568-76.
Kulig K, Harper-Hanigan K, Souza RB, Powers CM. Measurement of femoral torsion by ultrasound and magnetic resonance imaging: concurrent validity. Phys Ther. 2010 Nov; 90(11):1641-8.
Zarins ZA, Bolbos RI, Pialat JB, Link TM, Li X, Souza RB, Majumdar S. Cartilage and meniscus assessment using T1rho and T2 measurements in healthy subjects and patients with osteoarthritis. Osteoarthritis Cartilage. 2010 Nov; 18(11):1408-16.
Souza RB, Arya S, Pollard CD, Salem G, Kulig K. Patellar tendinopathy alters the distribution of lower extremity net joint moments during hopping. J Appl Biomech. 2010 Aug; 26(3):249-55.
Wirth W, Frobell RB, Souza RB, Li X, Wyman BT, Le Graverand MP, Link TM, Majumdar S, Eckstein F. A three-dimensional quantitative method to measure meniscus shape, position, and signal intensity using MR images: a pilot study and preliminary results in knee osteoarthritis. Magn Reson Med. 2010 May; 63(5):1162-71.
Souza RB, Draper CE, Fredericson M, Powers CM. Femur rotation and patellofemoral joint kinematics: a weight-bearing magnetic resonance imaging analysis. J Orthop Sports Phys Ther. 2010 May; 40(5):277-85.
Fowler EG, Knutson LM, Demuth SK, Siebert KL, Simms VD, Sugi MH, Souza RB, Karim R, Azen SP. Pediatric endurance and limb strengthening (PEDALS) for children with cerebral palsy using stationary cycling: a randomized controlled trial. Phys Ther. 2010 Mar; 90(3):367-81.
Souza RB, Powers CM. Concurrent criterion-related validity and reliability of a clinical test to measure femoral anteversion. J Orthop Sports Phys Ther. 2009 Aug; 39(8):586-92.
Hansma P, Yu H, Schultz D, Rodriguez A, Yurtsev EA, Orr J, Tang S, Miller J, Wallace J, Zok F, Li C, Souza R, Proctor A, Brimer D, Nogues-Solan X, Mellbovsky L, Peña MJ, Diez-Ferrer O, Mathews P, Randall C, Kuo A, Chen C, Peters M, Kohn D, Buckley J, Li X, Pruitt L, Diez-Perez A, Alliston T, Weaver V, Lotz J. The tissue diagnostic instrument. Rev Sci Instrum. 2009 May; 80(5):054303.
Souza RB, Powers CM. Differences in hip kinematics, muscle strength, and muscle activation between subjects with and without patellofemoral pain. J Orthop Sports Phys Ther. 2009 Jan; 39(1):12-9.
Souza RB, Powers CM. Predictors of hip internal rotation during running: an evaluation of hip strength and femoral structure in women with and without patellofemoral pain. Am J Sports Med. 2009 Mar; 37(3):579-87.
Austin AB, Souza RB, Meyer JL, Powers CM. Identification of abnormal hip motion associated with acetabular labral pathology. J Orthop Sports Phys Ther. 2008 Sep; 38(9):558-65.
Farrokhi S, Pollard CD, Souza RB, Chen YJ, Reischl S, Powers CM. Trunk position influences the kinematics, kinetics, and muscle activity of the lead lower extremity during the forward lunge exercise. J Orthop Sports Phys Ther. 2008 Jul; 38(7):403-9.
Souza RB, Powers CM. Trochlear groove spur in a patient with patellofemoral pain. J Orthop Sports Phys Ther. 2008 Mar; 38(3):158.