The optimum Butterworth-Wiener filter for I-123 IMP brain SPECT.
The optimum Butterworth-Wiener filter (BWF) for the preprocessing of N-isopropyl-p-[I-123]-iodoamphetamine (I-123 IMP) SPECT was determined by a simulation experiment. Sixty-four images of the brain phantom containing 14.8 MBq of I-123 IMP were collected with a gamma camera equipped with a slant hole collimator during a 360-degree rotation. The images were processed with 27 BWFs of different shapes, followed by SPECT image reconstruction and visual comparison. The optimum BWF had a cutoff frequency of 0.25/pixel, FWHM of four pixels, and constant of 0.05. The image quality was greatly affected by the cutoff frequency of BWF used for preprocessing.
Honda
N
N
Department of Radiology, Saitama Medical Center, Saitama Medical School, Japan.
Machida
K
K
Mamiya
T
T
Takahashi
T
T
Takishima
T
T
Hasegawa
N
N
Kamano
T
T
Hashimoto
M
M
Ohno
K
K
Hosoba
M
M
D001921:Brain / Q000000981:diagnostic imaging*; D002648:Child; D005374:Filtration / Q000295:instrumentation; D006801:Humans; D008297:Male; D008961:Models, Structural; D015899:Tomography, Emission-Computed, Single-Photon / Q000295:instrumentation*