TY - JOUR
T1 - [Effects of region of interest settings in signal-to-noise ratio measurement of clinical images using arrays of multiple receiver coils].
AU - Kitoh, Yoshihiro
AU - Imai, Hiroshi
AU - Miyati, Toshiaki
AU - Ogura, Akio
AU - Machida, Yoshio
AU - Doi, Tsukasa
AU - Tuchihashi, Toshio
AU - Kobayashi, Masato
AU - Shimizu, Kouzou
PY - 2012
Y1 - 2012
N2 - In many clinical imaging procedures using arrays of multiple receiver coils, a uniform sensitivity process is performed using the sensitivity distribution from the body coil. This causes the noise to be uneven, and background noise cannot be used when measuring the signal-to-noise ratio (SNR). The SNR of clinical images with sensitivity correction using arrays of multiple receiver coils sets the region of interest (ROI) in the region where the signal is uniform, and is limited to the identical ROI method where measurements are taken with noise from the identical region. When SNR is measured with the identical ROI method, uneven noise caused by sensitivity correction as well as the signal strength distribution within the ROI of the object is reflected in the noise. Therefore, evaluation must be performed in as localized a position as possible. Measurement error becomes small on images with higher resolution, and if ROI larger than 10×10 pixels can be set in a region of even signal, SNR measurement of clinical images with less underestimation may be possible.
AB - In many clinical imaging procedures using arrays of multiple receiver coils, a uniform sensitivity process is performed using the sensitivity distribution from the body coil. This causes the noise to be uneven, and background noise cannot be used when measuring the signal-to-noise ratio (SNR). The SNR of clinical images with sensitivity correction using arrays of multiple receiver coils sets the region of interest (ROI) in the region where the signal is uniform, and is limited to the identical ROI method where measurements are taken with noise from the identical region. When SNR is measured with the identical ROI method, uneven noise caused by sensitivity correction as well as the signal strength distribution within the ROI of the object is reflected in the noise. Therefore, evaluation must be performed in as localized a position as possible. Measurement error becomes small on images with higher resolution, and if ROI larger than 10×10 pixels can be set in a region of even signal, SNR measurement of clinical images with less underestimation may be possible.
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U2 - 10.6009/jjrt.2012_JSRT_68.9.1269
DO - 10.6009/jjrt.2012_JSRT_68.9.1269
M3 - Article
C2 - 23001275
AN - SCOPUS:84880437319
VL - 68
SP - 1269
EP - 1278
JO - Nihon Hoshasen Gijutsu Gakkai zasshi
JF - Nihon Hoshasen Gijutsu Gakkai zasshi
SN - 0369-4305
IS - 9
ER -