TY - JOUR
T1 - Development of image-based scatter correction for brain perfusion SPECT study
T2 - 2003 IEEE Nuclear Science Symposium Conference Record - Nuclear Science Symposium, Medical Imaging Conference
AU - Shidahara, Miho
AU - Watabe, Hiroshi
AU - Kim, Kyeong Min
AU - Kawatsu, Shoji
AU - Kato, Takashi
AU - Iida, Hidehiro
AU - Ito, Kengo
PY - 2003
Y1 - 2003
N2 - In order to convert scatter uncorrected into corrected SPECT image, an image-based scatter correction (IBSC) method has been developed. The aim of this study was validation of its role as image converter from scatter uncorrected into corrected images equivalent to image corrected by conventional TEW method. IBSC method is executed in the post-reconstruction process and only requires an attenuation corrected main photo-peak image with broad μ value, IACμb. The scatter component image is estimated by convolving IACμb with a scatter function followed by multiplying with an image-based scatter fraction (SF) function. The IBSC method was evaluated with Monte Carlo simulations and 99mTc-ECD SPECT human brain perfusion studies obtained from five volunteers. The noise property of the scatter corrected image using IBSC method, IIBSC, was compared with that by TEW method, ITEW, with simulated brain phantom images. Image contrast between gray with white matter in the human study was also compared between IBSC and TEW method. The global signal-to-noise (S/N) ratio of IIBSC was decreased to 14% compared to that of IAC μb, whereas that of ITEW was decreased to 21%. In human brain imaging, significant difference in image contrast between IBSC and TEW method was not observed (p<0.05). In conclusion, the IBSC method could be applied to clinical brain perfusion SPECT as conversion IAC μb into a scatter corrected image equivalent to ITEW. This achieves a better noise property than the TEW method.
AB - In order to convert scatter uncorrected into corrected SPECT image, an image-based scatter correction (IBSC) method has been developed. The aim of this study was validation of its role as image converter from scatter uncorrected into corrected images equivalent to image corrected by conventional TEW method. IBSC method is executed in the post-reconstruction process and only requires an attenuation corrected main photo-peak image with broad μ value, IACμb. The scatter component image is estimated by convolving IACμb with a scatter function followed by multiplying with an image-based scatter fraction (SF) function. The IBSC method was evaluated with Monte Carlo simulations and 99mTc-ECD SPECT human brain perfusion studies obtained from five volunteers. The noise property of the scatter corrected image using IBSC method, IIBSC, was compared with that by TEW method, ITEW, with simulated brain phantom images. Image contrast between gray with white matter in the human study was also compared between IBSC and TEW method. The global signal-to-noise (S/N) ratio of IIBSC was decreased to 14% compared to that of IAC μb, whereas that of ITEW was decreased to 21%. In human brain imaging, significant difference in image contrast between IBSC and TEW method was not observed (p<0.05). In conclusion, the IBSC method could be applied to clinical brain perfusion SPECT as conversion IAC μb into a scatter corrected image equivalent to ITEW. This achieves a better noise property than the TEW method.
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M3 - Conference article
AN - SCOPUS:11844258814
SN - 1095-7863
VL - 4
SP - 2652
EP - 2656
JO - IEEE Nuclear Science Symposium Conference Record
JF - IEEE Nuclear Science Symposium Conference Record
M1 - M10-259
Y2 - 19 October 2003 through 25 October 2003
ER -