Effect of radio frequency inhomogeneity correction on the reproducibility of intra-cranial volumes using MR image data.
The volumes of total brain, white matter, gray matter, and cerebrospinal fluid in normal volunteers were determined using a supervised nonparametric feature map segmentation of dual-contrast MR images after correcting for the radio frequency (RF) inhomogeneity. Reproducibility of the segmentation was evaluated in terms of inter-observer and scan-to-scan variations. A comparison with the published results indicates that the scan-to-scan and inter-observer variabilities in the determination of tissue volumes are substantially reduced following the RF inhomogeneity correction.
Narayana
P A
PA
Department of Radiology, University of Texas Medical School at Houston 77030, USA.
Borthakur
A
A
D001921:Brain / Q000033:anatomy & histology*; D002555:Cerebrospinal Fluid; D005260:Female; D005539:Foramen Magnum / Q000033:anatomy & histology; D006801:Humans; D007089:Image Enhancement / Q000379:methods*; D008279:Magnetic Resonance Imaging / Q000379:methods* / Q000706:statistics & numerical data; D008297:Male; D015588:Observer Variation; D011846:Radio Waves; D015203:Reproducibility of Results