SEMAC and MAVRIC for Artifact-Corrected MR Imaging around Metal in the Knee
نویسندگان
چکیده
Figure 4: Model created from segmentation of femoral TKR component from SEMAC images. REFERENCES 1. Wendt RE et al., Radiology 1988;168:837-41. 2. Sofka et al., Semin Musculoskel Radiol 2002;6:79-85. 3. Lu W et al., Magn Res Med 2009;62(1):66-76. 4. Koch KM et al., Magn Reson Med 2009;61(2):381-90. 5. Jee et al., Am J Roentgenol 2003;180:93-7. 6. Hennig J., Magn Reson Med 1986;3(6):823-33. 7. Beatty et al., Proc. ISMRM-ESMRMB p. 1749, 2007. 8. Rosset et al., J Digit Imaging 2004;17(3):205-16. SEMAC and MAVRIC for Artifact-Corrected MR Imaging around Metal in the Knee
منابع مشابه
New MR imaging methods for metallic implants in the knee: artifact correction and clinical impact.
PURPOSE To evaluate two magnetic resonance imaging (MRI) techniques, slice encoding for metal artifact correction (SEMAC) and multiacquisition variable-resonance image combination (MAVRIC), for their ability to correct for artifacts in postoperative knees with metal. MATERIALS AND METHODS A total of 25 knees were imaged in this study. Fourteen total knee replacements (TKRs) in volunteers were...
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Theory: The Multiple-Acquisitions with Variable Resonance Image Combination (MAVRIC) technique is a 3D method that builds composite images from multiple acquisitions with spatially non-selective RF excitations of varying frequency offsets [1]. The Slice Encoding for Metal Artifact Correction (SEMAC) technique excites 2D slices, performs a 3D acquisition, and uses view-angle-tilting [3] to reduc...
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Purpose: Multispectral imaging (MSI) approaches such as SEMAC, MAVRIC, MAVRIC-SL and others have shown promise for artifact-reduced imaging near metal [1-3]. These methods all combine multiple 3D images, each from a separately excited region (frequency bands in MAVRIC, distorted slices in SEMAC). The longer scan times of these approaches can be mitigated using reduced-excitation-region approach...
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