D. A. G. Wicks, G. J. Barker, and P. S. Tofts. Correction of intensity non-uniformity in mr images of any orientation. Mag. Reson. Imag., 11:183--196, 1993. 635  Home/Search Document Not in Database Summary Related Articles Check |
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Statistical Approach to Segmentation of Single-Channel.. - Rajapakse, Giedd.. (1997) (18 citations) (Correct)
....filtering techniques have been used to correct the magnetic field inhomogeneities [17] 28] such procedures may corrupt the edges and other high frequency details of the image. Measurement of magnetic field profiles using phantoms has been utilized to correct the inhomogeneities [57] [58], but when the images are obtained over a long period of time, a single phantom profile cannot reliably be used to correct the images. This requires acquisition of a reference phantom image for every subject scanned. Mathematical modeling techniques assuming that the intensity values for single ....
D. A. G. Wicks, G. J. Barker, and P. S. Tofts, "Correction of intensity nonuniformity in MR images of any orientation," Magn. Reson. Imag., vol. 11, pp. 183--196, 1993.
Intracranial Boundary Detection and Radio Frequency Correction.. - Mackiewich (1995) (2 citations) (Correct)
....MR images [5] A phantom image is produced by an MR scanner when a structurally homogeneous object is scanned. The resulting image is a very good model of the RF inhomogeneity, I RF (x; y; z) Therefore, corrected images are easily obtained. Several researchers use phantoms for RF correction [12, 18, 45, 53]. Because RF correction is not required for human analysis of MR scans, phantoms are not always available and other correction methods must be pursued. 3.3.2 Approximate Phantom Correction Axel et al. 5] suggest low pass filtering the MR image to approximate a phantom. Similar methods have ....
D. A. G Wicks, G. J. Barker, and P. S. Tofts. Correction of intensity nonuniformity in MR images of any orientation. Magnetic Resonance Imaging, 11(2):183--196, 1993.
Bias Field Estimation and Adaptive Segmentation of.. - Ahmed, Yamany.. (Correct)
....to find uniform regions in the image followed by a polynomial surface fit to those regions. The result of their correction is, however, very dependant on the quality of the segmentation step. Several authors have reported methods based on the use of phantoms for intensity calibration. Wicks et al.[4] proposed methods based on the signal produced by a uniform phantom to correct for MRI images of any orientation. Similarly, Tincher et al. 6] modeled the inhomogeneity function by a second order polynomial and fitted it to a uniform phantom scanned MR image. These phantom approaches, however, ....
D.A.G. Wicks, G.J. Barker and P.S. Tofts, "Correction of intensity nonuniformity in MR images of any orientation," Magnetic Resonance Imaging, Vol. 11, pp. 183-196, 1993.
Validating MRI Field Homogeneity Correction Using Image.. - Thacker, Lacey, Bromiley (2002) (Correct)
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D. A. G. Wicks, G. J. Barker, and P. S. Tofts. Correction of intensity non-uniformity in mr images of any orientation. Mag. Reson. Imag., 11:183--196, 1993. 635
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