title: The optimum Butterworth-Wiener filter for I-123 IMP brain SPECT.
abstract: 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.
authors.affiliation: Department of Radiology, Saitama Medical Center, Saitama Medical School, Japan.
authors.forename: N
authors.initials: N
authors.lastname: Honda
authors.forename: K
authors.initials: K
authors.lastname: Machida
authors.forename: T
authors.initials: T
authors.lastname: Mamiya
authors.forename: T
authors.initials: T
authors.lastname: Takahashi
authors.forename: T
authors.initials: T
authors.lastname: Takishima
authors.forename: N
authors.initials: N
authors.lastname: Hasegawa
authors.forename: T
authors.initials: T
authors.lastname: Kamano
authors.forename: M
authors.initials: M
authors.lastname: Hashimoto
authors.forename: K
authors.initials: K
authors.lastname: Ohno
authors.forename: M
authors.initials: M
authors.lastname: Hosoba
mesh_terms: 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*