Transient Elastography Using Impulsive Ultrasound Radiation Force: A Preliminary Comparison With Surface Palpation Elastography
| Autor: | Jeffrey C. Bamber, David Melodelima, Francis A. Duck, Jacqueline A. Shipley |
|---|---|
| Přispěvatelé: | Applications des ultrasons à la thérapie, Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de la Santé et de la Recherche Médicale (INSERM) |
| Rok vydání: | 2007 |
| Předmět: |
Materials science
Acoustics and Ultrasonics Acoustics Transducers Biophysics Modulus MESH: Algorithms MESH: Ultrasonics Slip (materials science) MESH: Palpation Models Biological 01 natural sciences 030218 nuclear medicine & medical imaging 03 medical and health sciences 0302 clinical medicine 0103 physical sciences Image Processing Computer-Assisted medicine Ultrasonics Radiology Nuclear Medicine and imaging Acoustic radiation force 010301 acoustics Elastic modulus Ultrasonography Palpation MESH: Stress Mechanical Radiological and Ultrasound Technology medicine.diagnostic_test Phantoms Imaging business.industry Ultrasound MESH: Models Biological Equipment Design MESH: Image Processing Computer-Assisted Elasticity MESH: Phantoms Imaging Transducer MESH: Elasticity Gelatin [SDV.IB]Life Sciences [q-bio]/Bioengineering Stress Mechanical Elastography MESH: Gelatin Transient elastography business Algorithms MESH: Ultrasonography MESH: Equipment Design MESH: Transducers |
| Zdroj: | Ultrasound in Medicine & Biology Ultrasound in Medicine & Biology, Elsevier, 2007, 33 (6), pp.959-69. ⟨10.1016/j.ultrasmedbio.2006.12.004⟩ |
| ISSN: | 0301-5629 |
| DOI: | 10.1016/j.ultrasmedbio.2006.12.004 |
| Popis: | International audience; The use of impulsive acoustic radiation force for transient strain imaging was investigated and compared with conventional elastography. A series of experiments were performed to evaluate the performances of the technique on gelatine phantoms containing inclusions and to determine a range of applications where radiation force elastography may be useful compared with static elastography. Slip boundaries and cylindrical inclusions of varying elastic modulus were placed in background materials. A focused ultrasound transducer was used to apply localised radiation force to a small volume of tissue mimic (100 mm3) for durations of 8 ms. A conventional real-time ultrasound imaging probe was used to obtain radio- frequency echo signals. The resulting strains were mapped using ultrasound correlation-based methods. The instantaneous strain immediately following cessation of the radiation force was observed at depth within homogeneous gels and within stiff inclusions. The highly localised and transient strain that is produced at depth permits the sensing of variations in tissue elastic properties that are difficult to detect with conventional elastography, due to greater independence from boundary conditions. In particular, radiation force elastograms were more homogeneous in the background and within the inclusions and displayed a superior contrast-transfer-efficiency, particularly for regions that had negative modulus contrast or that were disconnected from the background or the anterior medium by a low friction boundary. |
| Databáze: | OpenAIRE |
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