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380
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Introduction
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January 2000 - December 2000
August 2015 - present
Publications
Publications (380)
Purpose
To investigate the predictive value of talar head edema (THE) in acute ankle sprain for the presence of concomitant ligament injuries.
Methods
This retrospective study was approved by the ethics committee and informed consent was obtained. One hundred patients (mean age: 37 years ± 14 [standard deviation], range 13–77 years) with MRI of th...
Objective
To compare computer-based 3D-analysis for quantification of the femorotibial joint space width (JSW) using weight-bearing cone beam CT(WB-CT), non-weight-bearing multi-detector CT (NWB-CT), and weight-bearing conventional radiographs (WB-XR).
Design
Twenty-six participants prospectively underwent NWB-CT, WB-CT, and WB-XR of the knee. For...
Purpose
To evaluate the MRI anatomy of the scapho-trapezial-trapezoidal (STT) ligament complex in asymptomatic and symptomatic individuals.
Material and methods
In this retrospective study, STT ligament complex of 42 (male 69%, median age 37.5 years) asymptomatic ( n = 25) and symptomatic ( n = 17) (defined as pain described over the STT joint) in...
Objectives:
To assess the value of the divergence of toes on conventional radiographs of the foot for diagnosing Morton's neuroma.
Methods:
This retrospective case-control study was approved by the local ethics committee. In 100 patients with MRI-proven Morton's neuroma 2/3 or 3/4 (study group) and 100 patients without (control group), conventio...
Background:
Ischiofemoral impingement (IFI) is a known complication after total hip arthroplasty (THA).
Purpose:
To assess if increased postoperative (FA) is associated with magnetic resonance imaging (MRI) findings of IFI.
Material and methods:
In 221 patients with THA, two independent readers measured FA, ischiofemoral space (IFS), quadratus...
Objectives
To test the diagnostic accuracy of a 3D dual-echo steady-state (DESS) sequence at 7-T MRI regarding the detection of chondral calcific deposits of the knee in comparison to 3-T MRI, using CT as cross-sectional imaging reference standard.
Methods
CT and 7-T MRI (DESS) of knee joints in 42 patients with radiographically known chondrocalci...
Glenohumeral instability is the inability to keep the humeral head centered in the glenoid fossa. Glenohumeral instability can be classified according to etiology and direction of instability. The glenoid labrum, the glenohumeral ligaments, and the bony structures contribute to the stability glenohumeral joint and need to be addressed with imaging....
Objectives
To compare ultra-low-dose CT (ULD-CT) of the osseous pelvis with tin filtration to standard clinical CT (CT), and to assess the quality of computed virtual pelvic radiographs (VRs).
Methods
CT protocols were optimized in a phantom and three pelvic cadavers. Thirty prospectively included patients received both standard CT (automated tube...
Objective
To evaluate the prevalence, morphology, and clinical significance of a repeatedly observed yet not examined circumscript osseous defect at the anteroinferior aspect of the femoral head, termed femoral head defect.
Materials and methods
Retrospective study with approval of the institutional review board. There was informed consent by all...
Objective
To investigate long-term effects of pregnancy/childbirth on bone marrow edema (BME) and subchondral sclerosis of sacroiliac joints (SIJ) in comparison to MRI changes caused by spondyloarthritis (SpA) and assess the influence of birth method and number of children on SIJ-MRI changes.
Materials and methods
This is a retrospective cohort st...
Background:
Ultrasound (US) images are currently displayed on monitors, and their understanding needs good orientation skills. Direct overlay of US images onto the according anatomy is possible with augmented reality (AR) technologies. Our purpose was to explore the performance of US-guided needle placement with and without AR in situ US viewing....
Objective
To prospectively assess the evolution of postoperative MRI findings in asymptomatic patients after total hip arthroplasty (THA) over 24 months (mo).
Methods
This prospective cohort study included 9 asymptomatic patients (56.7 ± 15.0 years) after THA. Metal artifact–reduced 1.5-T MRI was performed at 3, 6, 12, and 24 mo after surgery. The...
Objective
To develop a new magnetic resonance imaging(MRI) scoring system for evaluation of active Charcot foot and to correlate the score with a duration of off-loading treatment ≥ 90 days.Methods
An outpatient clinic database was searched retrospectively for MRIs of patients with active Charcot foot who completed off-loading treatment. Images wer...
Objective
In total hip arthroplasty (THA), surgeons attempt to achieve a physiological antetorsion. However, postoperative antetorsion of the femoral stem is known to show large variabilities. The purpose of this study was to assess whether postoperative antetorsion is influenced by stem design or cementation.Materials and methodsThis retrospective...
Members of the International Skeletal Society compiled a glossary of terms for musculoskeletal radiology. The authors also represent national radiology or pathology societies in Asia, Australia, Europe, and the USA. We provide brief descriptions of musculoskeletal structures, disease processes, and syndromes and address their imaging features. Give...
The article "Deep convolutional neural network-based detection of meniscus tears: comparison with radiologists and surgery as standard of reference.
Background MRI with metal artifact reduction has gained importance in assessment of pain with total hip arthroplasty (THA). However, its role in diagnosis of periprosthetic joint infection (PJI) has not been well defined. Purpose To evaluate findings of PJI after THA and to determine the diagnostic performance of 1.5-T MRI with metal artifact reduc...
Purpose
To evaluate the diagnostic potential of MRI in patients with suspected CRPS (complex regional pain syndrome).
Method
A retrospective health-record search was conducted for patients with suspected CRPS (foot). Fifty patients with initially suspected CRPS were included (37 females (51 ± 13 years) and 13 males (44 ± 15 years)). All patients u...
Purpose
To evaluate 3D-printed anatomic models of the distal femur and patella for diagnosis and classification of patellofemoral dysplasia in comparison to conventional radiographs (CR) and CT.
Method
Following local ethics committee approval, CT-datasets of 50 patients were segmented and 3D-anatomic models of the distal femur and patella were pr...
Objective
To clinically validate a fully automated deep convolutional neural network (DCNN) for detection of surgically proven meniscus tears.Materials and methodsOne hundred consecutive patients were retrospectively included, who underwent knee MRI and knee arthroscopy in our institution. All MRI were evaluated for medial and lateral meniscus tear...
Objectives:
The aim of this study was to clinically validate a Deep Convolutional Neural Network (DCNN) for the detection of surgically proven anterior cruciate ligament (ACL) tears in a large patient cohort and to analyze the effect of magnetic resonance examinations from different institutions, varying protocols, and field strengths.
Materials...
Objectives:
To investigate sex-specific differences in hip muscle strength asymmetries, and associations between hip abductor and flexor strength asymmetries, hip morphology and symptoms in patients with femoroacetabular impingement syndrome (FAIS).
Design:
Cross-sectional study.
Setting:
Clinical setting.
Participants:
Thirty-four patients...
Objectives
To investigate the value of extensive perilesional muscle edema for the differentiation between myositis ossificans (MO) and malignant intramuscular soft tissue tumors on MRI.
Materials and methods
Two blinded readers analyzed MR examinations of 90 consecutive patients with intramuscular soft tissue masses (group 1: MO, n = 20; group 2:...
Objective
To determine if MRI findings prior to intra articular corticosteroid hip infiltration are related to treatment outcomes.
Methods
This prospective outcome study with retrospective MRI evaluation includes 100 consecutive patients with MRI within 6 months before a therapeutic intra articular hip injection. Labrum, bone marrow, acetabular an...
Objectives:
To assess the spectrum of periprosthetic MRI findings after primary total hip arthroplasty (THA).
Methods:
This multi-center cohort study analyzed 31 asymptomatic patients (65.7 ± 12.7 years) and 27 symptomatic patients (62.3 ± 11.9 years) between 6 months and 2 years after THA. 1.5-T MRI was performed using Compressed Sensing SEMAC...
Abstract Charcot foot refers to an inflammatory pedal disease based on polyneuropathy; the detailed pathomechanism of the disease is still unclear. Since the most common cause of polyneuropathy in industrialized countries is diabetes mellitus, the prevalence in this risk group is very high, up to 35%. Patients with Charcot foot typically present in...
The purpose of this work was to quantify muscular perfusion patterns of back muscles after exercise in patients with adolescent idiopathic scoliosis (AIS) using intravoxel incoherent motion (IVIM) MR perfusion imaging. The paraspinal muscles of eight patients with AIS (Cobb angle 35 ± 10°, range [25‐47°]) and nine healthy volunteers were scanned wi...
Background
The study describes the difference of pain reduction in interlaminar and transforaminal injections.
Purpose
To compare treatment outcomes after interlaminar versus transforaminal epidural steroid injections in patients with disc herniations at the level L3/4–L5/S1 and analyze associated magnetic resonance imaging (MRI) findings.
Materi...
Background:
The distribution of energy use among different lower limb muscles during walking and running is not well understood. Local blood flow within skeletal muscle tissue depends on its metabolic activity during activation. The non-invasive magnetic resonance microvascular perfusion method Intravoxel Incoherent Motion (IVIM) is able to quanti...
OBJECTIVE. The anchoring of the medial meniscus is consistent, whereas the attachment of the lateral meniscus is variable. On routine MRI examinations, we analyzed the prevalence of a distinct fibrous connection between the anterolateral aspect of the lateral meniscus and the iliotibial band-which we have termed the "accessory iliotibial band-menis...
Objectives
This study was conducted in order to determine the predictive value of MR arthrography findings for pain relief after glenohumeral corticosteroid injection.
Methods
This study prospectively enrolled 212 patients (mean age 51.4 years; range 15–90) who underwent fluoroscopy-guided glenohumeral corticosteroid injection. All patients receiv...
Background:
Autologous matrix-induced chondrogenesis (AMIC) has become an interesting treatment option for osteochondral lesions of the talus (OLTs) with promising clinical short- to midterm results.
Purpose:
To investigate the clinical and radiological outcome of the AMIC procedure for OLTs, extending the follow-up to 8 years.
Study design:
C...
Objectives
To evaluate the feasibility of 2D and 3D acetabular coverage assessments based on low-dose biplanar radiographs (BPR) in comparison with CT, and to demonstrate the influence of weight-bearing position (WBP) on anterior and posterior acetabular coverages.
Methods
Fifty patients (21 females, 29 males) underwent standing BPR and supine CT...
Purpose:
To compare changes in the pubic symphysis between women with vaginal delivery and women with caesarean sections within the first postpartum week.
Materials and methods:
After institutional review board approval 30 healthy women were prospectively examined with MRI (transverse STIR-sequence) three days after delivery. 17 women with vagin...
Purpose To compare the radiation exposure for participants and interventionalists as well as participant outcomes between fluoroscopy-guided versus CT-guided lumbar spinal injections. Materials and Methods This prospective, nonrandomized observational study included 1446 participants (mean age, 60.6 years; range, 18-91 years) who received transfora...
Objectives:
The aim of this study was to quantitatively assess changes in collagen structure using MR T1- and T2*-mapping in a novel controlled ex vivo tendon model setup.
Materials and methods:
Twenty-four cadaveric bovine flexor tendons underwent MRI at 3 T before and after chemical modifications, representing mechanical degeneration and augme...
Objective
To test a 3D-hindfoot alignment (HA) measurement technique based on low-dose biplanar radiographs (BPRs) in a clinical setting and compare the results with 2D-HA measurements on long axial view radiographs (LARs).
Materials and methods
This prospective study was approved by the local institutional review board. HA measurements on 3D-BPR...
Background
In daily routine, pincer femoroacetabular impingement (FAI) findings are often seen without a clinical diagnosis of pincer FAI.
Purpose
To assess the presence of pincer FAI MRI findings in asymptomatic volunteers with negative impingement test versus patients with clinically confirmed FAI.
Study Type
Case–control study.
Population
Six...
Objective:
The objective of our study was to compare MRI findings in the sacroiliac joints of postpartum women (as a model of mechanical changes) and women with known axial spondyloarthritis (as an inflammatory model).
Subjects and methods:
For this prospective multicenter age-matched, case-control study, sacroiliac joint MRI examinations of 30...
Objectives:
The purpose of this study was to identify an optimal imaging protocol for metal artifact reduced magnetic resonance imaging by application of different imaging and postprocessing parameters in compressed sensing slice-encoding for metal artifact correction (CS-SEMAC) and to test it in patients with total hip arthroplasty (THA).
Materi...
Objective
To investigate the responsiveness to exercise therapy of patients with femoroacetabular impingement syndrome (FAIS), and to investigate differences in hip function, strength, and morphology between responders versus nonresponders.
Methods
Patients with FAIS underwent 12 weeks of semi‐standardized and progressive exercise therapy. A good...
Purpose To determine the diagnostic performance of MRI for helping to predict posterolateral knee instability in patients with acute anterior cruciate ligament (ACL) tear. Materials and Methods This retrospective cohort study was performed in a consecutive series of 162 patients (mean age, 32.8 years ± 10.0 [standard deviation]; 95 men [mean age, 3...
Autologous matrix-induced chondrogenesis (AMIC) has recently become an interesting treatment option for osteochondral lesions of the talus.
This work shows that AMIC for osteochondral lesions of the talus leads to significant reduction of pain, recovery of ankle function and return to sports at a follow-up of 2 to 8 years. The moderate MRI findings...
Case:
A 38-year-old man presented with multifocal, partially confluent osteolytic lesions in the proximal dia-meta-epiphyseal region of the proximal aspect of the left tibia, which had been found incidentally when a radiograph was made after a rotational knee injury. When the results of a percutaneous core needle biopsy proved inconclusive, an ope...
Category
Ankle
Introduction/Purpose
Autologous matrix-induced chondrogenesis (AMIC) has recently become an interesting treatment option for osteochondral lesions of the talus since it combines safety and efficacy with overcoming several drawbacks of other surgical techniques. With AMIC, donor side morbidity of osteochondral autografts is eliminate...
Background:
Anatomical landmarks for templating of total hip arthroplasty (THA) that are visible both during surgery and on radiographs are rare. If surgery is performed through a direct anterior approach the external obturator tendon (EO) is consistently visible. To use this point as a reference the exact position and dimensions of the footprint...
Objective:
The objective of our study was to evaluate a novel measurement technique for assessing the supra- and infratrochanteric components of femoral torsion, establish reference values in healthy volunteers, and compare supra- and infratrochanteric torsion angles in patients with hip dysplasia and patients with femoroacetabular impingement (FA...
Objectives:
The aim of this study was to assess feasibility and accuracy of augmented reality-guided lumbar facet joint injections.
Materials and methods:
A spine phantom completely embedded in hardened opaque agar with 3 ring markers was built. A 3-dimensional model of the phantom was uploaded to an augmented reality headset (Microsoft HoloLens...
Objectives:
The aim of this study was to assess the interreader agreement and diagnostic accuracy of morphologic magnetic resonance imaging (MRI) analysis and quantitative MRI-based texture analysis (TA) for grading of cartilaginous bone tumors.
Materials and methods:
This retrospective study was approved by our local ethics committee. Magnetic...
Study Design
Cross-sectional study.
Objectives
To evaluate intrarater and interrater agreement among physical therapists with different clinical experience in performing a visual rating of movement-pattern quality of patients with femoroacetabular impingement (FAI) syndrome using a semi-quantitative scale.
Background
Visual rating of movement pat...
Objective:
To compare the prevalence of vitamin D insufficiency between radiologists and a control group of non-radiologists.
Materials and methods:
This prospective cross-sectional study was conducted at the Swiss Congress of Radiology in May of 2016. Attendees (radiologists and non-radiologists) were asked to give a venous blood sample to meas...
Background:
Anatomic findings on MRI scans of the shoulder likely affect patients differently based on their physical demands and fitness levels. The natural history of these anatomic findings once professional overhead athletes retire remains unclear. A better understanding of what happens with these findings after retirement may influence how we...
Objective
To describe the frequency of inflammatory-like findings on MR imaging in asymptomatic volunteers and compare them with patients with known rheumatoid arthritis and psoriatic arthritis. Materials and methodsMR images of fingers in 42 asymptomatic volunteers and 33 patients with rheumatoid/psoriatic arthritis were analyzed. The Outcome Meas...
It is almost 20 years since the concept of femoroacetabular impingement (FAI) was introduced, and by now a large number of orthopaedic surgeons, sports physicians, and radiologists have implemented this concept in clinical practice, as is evident in the steady rise in the number of patients diagnosed and treated for FAI. However, this trend has bee...
Purpose:
We set out to compare outcomes in CT-guided lumbar transforaminal nerve root block patients receiving either particulate or non-particulate corticosteroids.
Materials and methods:
This was a retrospective comparative effectiveness outcomes study on two cohorts of lumbar radiculopathy patients. 321 received particulate and 173 non-partic...
Objective
To investigate the different morphologic types of the fovea capitis femoris and the spectrum of osseous spurs/osteophytes of the fovea in asymptomatic volunteers and patients with hip osteoarthritis. Material and methodsSixty-five patients (mean age 63.6 years) with radiographically confirmed osteoarthritis of the hip and 59 asymptomatic...
Introduction To be able to predict which patients are more likely to have a positive treatment outcome, the purpose of this study is 1: To compare outcomes after intra-articular corticosteroid knee injections with the Kellgren and Lawrence (KL) 5 and 3 grading systems for knee osteoarthritis, the Osteoarthritis Research Society International (OARSI...
Objective
Aim of this study was to evaluate the flexion-adduction-internal rotation (FADIR) test accuracy for screening cam and pincer morphology in youth male ice hockey players without diagnosed hip disorders.
Design
Cross-sectional study.
Methods
Seventy-four ice hockey players with a mean age of 16 years (range: 13 to 20 years) were assessed...
Objective:
The purpose of this article is to determine the osseous morphology of snapping scapulae on CT images.
Materials and methods:
Retrospectively, 2D and 3D CT images of the scapulae of 35 patients with snapping scapula were compared with 35 age-matched control group subjects. Two observers analyzed the following parameters: presence of th...
Objective:
To assess whether the use of cartilaginous contours at the femoral condyles instead of bony contours significantly changes femoral torsion measurements in children.
Materials and methods:
Femoral torsion was measured in 32 girls (mean age 10.1 years±2.3 standard deviation) and 42 boys (10.9 years±2.5) on axial magnetic resonance (MR)...
The common hamstring tendon is comprised of biceps femoris (long head), semitendinosus and semimembranosus [1]. At the ischial attachment site, semitendinosus and biceps femoris (BF-ST) form a conjoined tendon with a common osseous origin from the ischium. The semimembranosus (SM) tendon originates separately, contiguous with the conjoined tendon.
Introduction: Based on U.S. Food and Drug Administration warnings, this hospital switched from using particulate to nonparticulate corticosteroids for lumbar nerve root injections. We set out to compare outcomes in lumbar nerve root block patients receiving either particulate or nonparticulate corticosteroids.
Materials and Methods: This was a comp...
Purpose:
To investigate the short and medium term efficacy and patient outcomes of DIAM spinal stabilization system on back pain, disability, leg pain and quality of life.
Methods:
165 patients were enrolled; 146 patients with a single level disc herniation (L2 to L5) were randomized: 75 investigational (herniectomy and DIAM) and 71 control (her...
Introduction:
To quantify acetabular version using 3D reconstructions based on biplanar radiographs (BPR) with CT as reference standard.
Materials and methods:
No institutional review board approval was needed. Nine dry-bone pelvises underwent BPR in five different positions (rotation/tilt). 3D models of each pelvis were reconstructed by two rad...
Level of evidence:
4 Technical Efficacy: Stage 3 J. Magn. Reson. Imaging 2017;46:972-991.
Objective
The aim of our study was to evaluate the reliability and interchangeability of femoral (FT) and tibial torsion (TT) measurements in children using magnetic resonance (MR) imaging compared to measurements on 3D models based on biplanar radiographs (BPR). Materials and methodsFT and TT were measured in 60 children (mean age 10.1 years; rang...
Objectives
To prospectively compare T1-weighted fat-suppressed spin-echo magnetic resonance (MR) sequences after gadolinium application (T1wGdFS) to STIR sequences in patients with acute and chronic foot pain. Methods
In 51 patients referred for MRI of the foot and ankle, additional transverse and sagittal T1wGdFS sequences were obtained. Two sets...
Purpose:
To prospectively compare defects of the articular cartilage and labrum in asymptomatic volunteers and in patients with femoroacetabular impingement (FAI) matched for age and gender.
Materials and methods:
This cross-sectional study was institutional review board approved. A total of 63 asymptomatic volunteers and 63 patients with sympto...
Objective:
The objective of the present study is to evaluate arthritis-like findings on MRI studies of the forefeet of healthy volunteers versus patients with symptomatic rheumatoid arthritis (RA) or psoriatic arthritis (PsA).
Materials and methods:
Two observers analyzed MR images of the forefeet of 31 healthy volunteers, 30 patients with sympt...
Purpose To determine and compare the frequency of imaging abnormalities in asymptomatic and symptomatic patients after arthroscopic hip surgery. Materials and Methods This study was approved by the institutional review board. Informed consent was obtained from all patients. Thirty-four patients (17 asymptomatic and 17 symptomatic patients) underwen...
Objective:
The objective of our study was to assess delayed-onset muscle soreness (DOMS) over time using quantitative MRI and shear-wave ultrasound (US) elastography.
Subjects and methods:
Five male (mean age ± SD, 39.6 ± 4.6 years) and five female (30.6 ± 13.5 years) volunteers underwent 1.5-T MRI before and after (15 minutes, 1 day, 3 days, 7...
Objective
The purpose of this study is to compare the reliability of SW velocity measurements of two different ultrasound systems and their correlation with the tangent traction modulus in a non-static tendon strain model. Materials and MethodsA bovine tendon was fixed in a custom-made stretching device. Force was applied increasing from 0 up to 18...
Objectives
To determine whether specific MRI findings are related to outcomes after lumbar transforaminal epidural steroid injections (TFESI) and to assess the inter-rater reliability of imaging diagnosis. Materials and methodsA prospective outcomes study on 156 consecutive patients with 1-month follow-up outcomes data and MRI within 3 months of TF...
Hip or groin pain in athletes is common and clinical presentation is often nonspecific. Imaging is a very important diagnostic step in the work-up of athletes with hip pain. This review article provides an overview on hip biomechanics and discusses strategies for hip imaging modalities such as radiography, ultrasonography, computed tomography, and...