Journal: Skeletal Radiology

Abbreviation

Skeletal Radiol

Publisher

Springer

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ISSN

0364-2348
1432-2161

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Publications1 - 10 of 13
  • Metal-induced artifacts in computed tomography and magnetic resonance imaging: comparison of a biodegradable magnesium alloy versus titanium and stainless steel controls
    Item type: Journal Article
    Filli, Lukas; Luechinger, Roger; Frauenfelder, Thomas; et al. (2015)
    Skeletal Radiology
  • X-ray absorption-based imaging and its limitations in the differentiation of ancient mummified tissue
    Item type: Journal Article
    Wanek, Johann; Székely, Gábor; Rühli, Frank (2010)
    Skeletal Radiology
  • Detection of small tendon lesions by sonoelastographic visualization of strain profile differences: initial experiences
    Item type: Journal Article
    Buck, Aline R.; Verstraete, Nina; Li, Yufei; et al. (2012)
    Skeletal Radiology
  • Comparison of shear wave velocity measurements assessed with two different ultrasound systems in an ex-vivo tendon strain phantom
    Item type: Journal Article
    Rosskopf, Andrea B.; Bachmann, Elias; Snedeker, Jess Gerrit; et al. (2016)
    Skeletal Radiology
  • Diagnostic utility of perilesional muscle edema in myositis ossificans
    Item type: Journal Article
    Zubler, Veronika; Mühlemann, Malin; Sutter, Reto; et al. (2020)
    Skeletal Radiology
    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: malignant tumors, n = 70). Extent of edema around lesions was graded (0, none; 1, minimal edema; 2, moderate edema; 3, extensive edema). Edema-lesion ratio (ELR = ratio of the maximal diameter of the edema and the maximal diameter of the central lesion) was calculated. ROC analysis, Mann-Whitney U test, and Kappa test were used. Results A total of 70% and 60% of patients with MO had edema grade 3 (reader 1/reader 2), 30%/40% edema grade 2. For the patients with malignant tumors, it was 2.9%/1.4% (edema grade 3) and 16%/23% (edema grade 2). Interrater reliability was substantial (kappa = 0.66). Extent of edema was significantly higher for patients of group 1 (p < 0.0001, both readers). Mean ELR was 3.60 (group 1) and 1.35 (group 2), with statistically significant differences (p < 0.0001). Grade 3 edema showed a sensitivity/specificity of 70%/97.1% (reader 1) and 60%/99% (reader 2) for diagnosing MO. For ELR > 2.0, sensitivity was 90% and specificity 91% for diagnosing MO. Conclusions Extensive perilesional muscle edema on MRI of more than double the size of the central lesion is highly specific, but not pathognomonic for myositis ossificans in the early/intermediate stage in the differentiation to malignant intramuscular soft tissue lesions.
  • Normative values for CT-based texture analysis of vertebral bodies in dual X-ray absorptiometry-confirmed, normally mineralized subjects
    Item type: Journal Article
    Mannil, Manoj; Eberhard, Matthias; Becker, Anton S.; et al. (2017)
    Skeletal Radiology
  • Assessment of calf muscle constitution in chronic Achilles tendon disease using Dixon-based MRI
    Item type: Journal Article
    Goller, Sophia S.; Kajdi, Georg W.; Wirth, Stephan; et al. (2024)
    Skeletal Radiology
    Objectives To assess calf muscle constitution in chronic Achilles tendon disease (ATD) using two-point Dixon-based MRI (2pt-MRIDIXON). Materials and methods This retrospective study analyzed 91 patients (36 females; 57.0 ± 14.4 years) with midportion or insertional chronic ATD who underwent clinical MRI of the Achilles tendon (AT), including 2pt-MRIDIXON for quantitative assessment of calf muscle fat content (MFC). Additionally, two radiologists qualitatively assessed MFC, AT quality, and co-pathologies. 2pt-MRIDIXON-derived fat fractions (FF) were related to patients’ demographics and qualitative imaging findings. Results The overall mean FF derived from 2pt-MRIDIXON of the triceps surae muscle was 11.2 ± 9.3%. Comparing midportion and insertional ATD, there was no significant difference regarding fatty muscle infiltration assessed with 2pt-MRIDIXON (P ≥ .47) or qualitative grading (P ≥ .059). More severe AT thickening (11 vs.9 mm, P < .001) and complete tears (29 vs. 9%, P = .025) were significantly more common in midportion ATD, while partial tears were significantly more frequent in insertional ATD (55 vs. 31%, P = .027). Soleus muscle edema was more prevalent in midportion than insertional ATD (40 vs. 9%, P = .002). In contrast, insertional ATD more commonly featured bone marrow edema (61 vs. 2%), Haglund’s deformity (67 vs. 0%), and retrocalcaneal bursitis (82 vs. 43%) (P ≤ .002). Significant correlations (P ≤ .001) were demonstrated between FF, AT diameter, age (both in midportion and insertional ATD), and body mass index (in midportion ATD only) (ρ range = 0.53–0.61). Conclusion In chronic ATD, calf MFC was statistically equivalent (approximately 11%), irrespective of the localization of tendon damage. More severe tendon thickening and complete tears were more common in midportion ATD, and, vice versa, partial AT tears were significantly more frequent in insertional ATD.
  • Elastography
    Item type: Review Article
    Li, Yufei; Snedeker, Jess Gerrit (2011)
    Skeletal Radiology
  • The “Balgrist Score” for evaluation of Charcot foot: a predictive value for duration of off-loading treatment
    Item type: Journal Article
    Berli, Martin C.; Higashigaito, Kai; Götschi, Tobias; et al. (2021)
    Skeletal Radiology
    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 were assessed by two radiologists (readers 1 and 2) and an orthopedic surgeon (reader 3). Sanders/Frykberg regions I–V were evaluated for soft tissue edema, bone marrow edema, erosions, subchondral cysts, joint destruction, fractures, and overall regional manifestation using a score according to degree of severity (0–3 points). Intraclass correlations (ICC) for interreader agreement and receiver operating characteristic analysis between MR findings and duration of off-loading-treatment were calculated. Results Sixty-five feet in 56 patients (34 men) with a mean age of 62.4 years (range: 44.5–85.5) were included. Region III (reader 1/reader 2: 93.6/90.8%) and region II (92.3/90.8%) were most affected. The most common findings in all regions were soft tissue edema and bone marrow edema. Mean time between MRI and cessation of off-loading-treatment was 150 days (range: 21–405). The Balgrist Score was defined in regions II and III using soft tissue edema, bone marrow edema, joint destruction, and fracture. Interreader agreement for Balgrist Score was excellent: readers 1/2: ICC 0.968 (95% CI: 0.948, 0.980); readers 1/2/3: ICC 0.856 (0.742, 0.917). A cutoff of ≥ 9.0 points in Balgrist Score (specificity 72%, sensitivity 66%) indicated a duration of off-loading treatment ≥ 90 days. Conclusion The Balgrist Score is a new MR scoring system for assessment of active Charcot foot with excellent interreader agreement. The Balgrist Score can help to identify patients with off-loading treatment ≥ 90 days.
  • Muscle atrophy in diabetic patients with Charcot foot: a case-control study
    Item type: Journal Article
    Berli, Martin C.; Azaiez, Nicolas; Götschi, Tobias; et al. (2023)
    Skeletal Radiology
    PurposeTo evaluate the distribution and severity of muscle atrophy in diabetic patients with active Charcot foot (CF) compared to diabetic patients without CF. Furthermore, to correlate the muscle atrophy with severity of CF disease.Material/methodsIn this retrospective study, MR images of 35 diabetic patients (21 male, median:62.1 years +/- 9.9SD) with active CF were compared with an age- and gender-matched control group of diabetic patients without CF. Two readers evaluated fatty muscle infiltration (Goutallier-classification) in the mid- and hindfoot. Furthermore, muscle trophic (cross-sectional muscle area (CSA)), intramuscular edema (none/mild versus moderate/severe), and the severity of CF disease (Balgrist Score) were assessed.ResultsInterreader correlation for fatty infiltration was substantial to almost perfect (kappa-values:0.73-1.0). Frequency of fatty muscle infiltration was high in both groups (CF:97.1-100%; control:77.1-91.4%), but severe infiltration was significantly more frequent in CF patients (p-values: < 0.001-0.043). Muscle edema was also frequently seen in both groups, but significantly more often in the CF group (p-values: < 0.001-0.003). CSAs of hindfoot muscles were significantly smaller in the CF group. For the flexor digitorum brevis muscle, a cutoff value of 139 mm(2) (sensitivity:62.9%; specificity:82.9%) in the hindfoot was found to differentiate between CF disease and the control group. No correlation was seen between fatty muscle infiltration and the Balgrist Score.ConclusionMuscle atrophy and muscle edema are significantly more severe in diabetic patients with CF disease. Muscle atrophy does not correlate with the severity of active CF disease. A CSA < 139 mm(2) of the flexor digitorum brevis muscle in the hindfoot may indicate CF disease.
Publications1 - 10 of 13