Related Experiment Videos
Acute rhabdomyolysis: evaluation with magnetic resonance imaging compared with computed tomography and
A E Lamminen1, P E Hekali, E Tiula
1Department of Diagnostic Radiology, University Central Hospital, Helsinki, Finland.
Abstract:
Fifteen patients with acute rhabdomyolysis were evaluated with low field magnetic resonance (MR) imaging and the results compared with those obtained using computed tomography (CT) and ultrasonography (US). With MR imaging, abnormal muscles with areas of increased signal intensity were seen in every patient, which probably reflects increased water content or increased mobility of water molecules caused by inflammatory reaction and oedema in the injured and necrotic muscles. Computed tomography without intravenous contrast medium demonstrated abnormal muscles in most patients examined with this modality. The CT findings consisted of areas of focal hypodensity in muscles. With US, abnormal muscles were seen in less than half of the patients studied. The normal structure of striated muscle was focally disturbed and areas of both decreased and increased echogenicity were found. Magnetic resonance imaging had a higher sensitivity in the detection of abnormal muscles than CT or US (100%, 62% and 42%, respectively). The findings of all these modalities are non-specific, but together with the clinical and laboratory data they confirm the diagnosis of rhabdomyolysis. The information gained from imaging studies is useful in the assessment of the extent and distribution of rhabdomyolysis. The precise identification of affected muscle compartments by MR imaging is valuable when surgical fasciotomy is considered for treatment; the procedure can then be appropriately directed to the compartments with clearly abnormal muscles.
Insights
Magnetic resonance imaging (MRI) is highly sensitive for detecting muscle abnormalities in rhabdomyolysis, outperforming computed tomography (CT) and ultrasonography (US). This imaging information aids in assessing disease extent and guiding surgical interventions.
Area of Science:
- Radiology
- Musculoskeletal Imaging
- Medical Diagnostics
Background:
- Rhabdomyolysis involves muscle breakdown, leading to potential complications.
- Accurate assessment of muscle involvement is crucial for patient management.
- Conventional imaging modalities have limitations in detecting muscle abnormalities.
Purpose of the Study:
- To compare the diagnostic performance of low-field magnetic resonance (MR) imaging with computed tomography (CT) and ultrasonography (US) in acute rhabdomyolysis.
- To evaluate the sensitivity of MR imaging in detecting abnormal muscles.
- To assess the utility of imaging in guiding treatment decisions for rhabdomyolysis.
Main Methods:
- Low-field MR imaging was performed on fifteen patients with acute rhabdomyolysis.
- Results were compared with CT and US findings.
- Sensitivity of each modality for detecting abnormal muscles was calculated.
Main Results:
- MR imaging detected abnormal muscles in 100% of patients, showing increased signal intensity.
- CT detected abnormalities in 62% of patients (focal hypodensity).
- US detected abnormalities in 42% of patients (disturbed muscle structure).
- MR imaging demonstrated higher sensitivity than CT and US.
Conclusions:
- MR imaging is a highly sensitive tool for evaluating muscle abnormalities in rhabdomyolysis.
- Imaging findings, while non-specific, aid in diagnosis and assessing disease extent.
- MR imaging's precise identification of affected compartments is valuable for surgical planning, such as fasciotomy.