Improved Correction of Residual Intensity Nonuniformity in 2D FLAIR MR Images of Brain at 3-T MRI scanner
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| 003 | CHVBK | ||
| 005 | 20210128100938.0 | ||
| 007 | cr unu---uuuuu | ||
| 008 | 210128e20150801xx s 000 0 eng | ||
| 024 | 7 | 0 | |a 10.1007/s00723-015-0696-x |2 doi |
| 035 | |a (NATIONALLICENCE)springer-10.1007/s00723-015-0696-x | ||
| 100 | 1 | |a Abe |D Takayuki |u National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage, 263-8555, Chiba, Japan |4 aut | |
| 245 | 1 | 0 | |a Improved Correction of Residual Intensity Nonuniformity in 2D FLAIR MR Images of Brain at 3-T MRI scanner |h [Elektronische Daten] |c [Takayuki Abe] |
| 520 | 3 | |a The purpose of this study is to correct residual intensity nonuniformities from B1 inhomogeneities caused by a birdcage body coil. The proposed method modified existing calibration techniques and effectively combined homomorphic filtering. The causes of the nonuniform residual intensity in the brain magnetic resonance resonance (MRI) were investigated by using actual B1 field mapping with a birdcage body coil and a local receiver coil. The two B1 field maps were compared. To estimate a residual intensity nonuniformity distribution map, images with a birdcage body coil and images with a local coil were used. Then, a homomorphic filtering technique was effectively applied to only the image produced using a birdcage body coil. The correction map was calculated from the estimated residual intensity nonuniformity distribution map. The image after correction was evaluated. The B1+ maps were almost the same for different local coils in the same subjects. The B1+ maps were the same when a birdcage body coil was used as a receiver coil, regardless of whether the local coil was located in the MR scanner or not. However, the B1+ maps were significantly different between images produced using a birdcage body coil as a receiver coil and those using a local coil as a receiver. The estimated residual nonuniformity map was estimated. The brain MR images obtained by using the proposed method were more uniform than images with conventional corrections. A novel correction method was developed. It has the potential to improve the diagnosis of brain diseases. | |
| 540 | |a Springer-Verlag Wien, 2015 | ||
| 773 | 0 | |t Applied Magnetic Resonance |d Springer Vienna |g 46/8(2015-08-01), 941-951 |x 0937-9347 |q 46:8<941 |1 2015 |2 46 |o 723 | |
| 856 | 4 | 0 | |u https://doi.org/10.1007/s00723-015-0696-x |q text/html |z Onlinezugriff via DOI |
| 898 | |a BK010053 |b XK010053 |c XK010000 | ||
| 900 | 7 | |a Metadata rights reserved |b Springer special CC-BY-NC licence |2 nationallicence | |
| 908 | |D 1 |a research-article |2 jats | ||
| 949 | |B NATIONALLICENCE |F NATIONALLICENCE |b NL-springer | ||
| 950 | |B NATIONALLICENCE |P 856 |E 40 |u https://doi.org/10.1007/s00723-015-0696-x |q text/html |z Onlinezugriff via DOI | ||
| 950 | |B NATIONALLICENCE |P 100 |E 1- |a Abe |D Takayuki |u National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage, 263-8555, Chiba, Japan |4 aut | ||
| 950 | |B NATIONALLICENCE |P 773 |E 0- |t Applied Magnetic Resonance |d Springer Vienna |g 46/8(2015-08-01), 941-951 |x 0937-9347 |q 46:8<941 |1 2015 |2 46 |o 723 | ||