Elastography is an innovative medical imaging modality that measures the elasticity or stiffness of soft tissues in the body. This technique is primarily used to detect lesions in tissues that may be harder or softer than the surrounding normal tissues. Elastography enhances the diagnostic capabilities of ultrasound and magnetic resonance imaging (MRI) by providing detailed information about tissue consistency.
The principle behind elastography is straightforward: it applies a mechanical force, either manually or via acoustic waves, to the tissue being examined. The tissue’s response to this force is then measured and visualised. Tissues with different mechanical properties respond differently, allowing physicians to detect areas of potential concern based on how stiff or elastic they are. For instance, cancerous tumours often appear stiffer than the surrounding normal tissue due to their dense cellular structure.
There are several types of elastography, each suited to specific applications. Strain elastography, the simplest form, measures how much tissue deforms under the application of an external force. On the other hand, shear wave elastography uses acoustic pulses to generate shear waves within the tissue, and the speed of these waves indicates tissue stiffness.
This technique is particularly valuable in the diagnosis of liver fibrosis, where it has become a less invasive alternative to liver biopsy. It is also extensively used in breast imaging to differentiate benign from malignant lesions, offering a potential reduction in unnecessary biopsies. With ongoing advancements, the scope of elastography continues to expand, promising further improvements in the diagnosis and management of various medical conditions.
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By | 6 minutes of readingElastography is a cutting-edge imaging technique that enhances diagnostic precision by assessing tissue stiffness, revolutionising liver disease and cancer detection.
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