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Phantom evaluation of imaging modalities for silicone breast implants.
B G Steinbach1, S K Hiskes, J R Fitzsimmons
1Department of Radiology, University of Florida, Gainesville 32610-0374.
Investigative Radiology
|October 1, 1992
Summary
Radiologists can better assess silicone breast implants using computed tomography (CT) and magnetic resonance imaging (MRI). These methods effectively image implants and detect free silicone, improving patient care.
Area of Science:
- Radiology
- Medical Imaging
Background:
- Silicone breast implants are common, but concerns about adverse effects necessitate accurate imaging.
- Radiologists play a crucial role in evaluating augmented breasts and detecting complications.
Purpose of the Study:
- To compare the effectiveness of various imaging modalities for evaluating intact silicone implants.
- To assess the ability of different imaging techniques to detect free silicone in adjacent tissues.
Main Methods:
- Phantoms (contrast resolution and veal breast) were imaged using xeromammography, film-screen mammography, ultrasound, computed tomography (CT), and magnetic resonance imaging (MRI).
- Proton MRI spectroscopy was performed on fat, silicone, and water samples.
- Radiologist consensus determined the presence of free silicone.
Main Results:
- Computed tomography (CT) and magnetic resonance imaging (MRI) demonstrated superior imaging of both the implant and free silicone.
- Specific MRI techniques, including spin-density scans, FLASH, and FISP, offered excellent resolution.
- MRI showed a characteristic chemical shift artifact around silicone and effective signal suppression with frequency selective pre-saturation techniques.
Conclusions:
- CT and MRI are highly effective for evaluating silicone breast implants and detecting free silicone.
- Further advancements in MRI techniques, particularly frequency selective pre-saturation, hold promise for improved implant assessment.