Direct comparison study between FDG-PET and IMP-SPECT for diagnosing Alzheimer's disease using 3D-SSP analysis in the same patients

The purpose of this study was to evaluate and compare the diagnostic ability of 2-[(18)F]-fluoro-2-deoxy-D: -glucose (FDG) positron emission tomography (PET) and N-isopropyl-p-(123)I iodoamphetamine single photon emission computed tomography (IMP-SPECT) using three-dimensional stereotactic surface p...

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Veröffentlicht in:Japanese journal of radiology 2007-07, Vol.25 (6), p.255-262
Hauptverfasser: Nihashi, Takashi, Yatsuya, Hiroshi, Hayasaka, Kazumasa, Kato, Rikio, Kawatsu, Shoji, Arahata, Yutaka, Iwai, Katsushige, Takeda, Akinori, Washimi, Yukihiko, Yoshimura, Kumiko, Mizuno, Kanako, Kato, Takashi, Naganawa, Shinji, Ito, Kengo
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container_end_page 262
container_issue 6
container_start_page 255
container_title Japanese journal of radiology
container_volume 25
creator Nihashi, Takashi
Yatsuya, Hiroshi
Hayasaka, Kazumasa
Kato, Rikio
Kawatsu, Shoji
Arahata, Yutaka
Iwai, Katsushige
Takeda, Akinori
Washimi, Yukihiko
Yoshimura, Kumiko
Mizuno, Kanako
Kato, Takashi
Naganawa, Shinji
Ito, Kengo
description The purpose of this study was to evaluate and compare the diagnostic ability of 2-[(18)F]-fluoro-2-deoxy-D: -glucose (FDG) positron emission tomography (PET) and N-isopropyl-p-(123)I iodoamphetamine single photon emission computed tomography (IMP-SPECT) using three-dimensional stereotactic surface projections (3D-SSP) in patients with moderate Alzheimer's disease (AD). FDG-PET and IMP-SPECT were performed within 3 months in 14 patients with probable moderate AD. Z-score maps of FDG-PET and IMP-SPECT images of a patient were obtained by comparison with data obtained from control subjects. Four expert physicians evaluated and graded the glucose hypometabolism and regional cerebral blood flow (rCBF), focusing in particular on the posterior cingulate gyri/precunei and parietotemporal regions, and determined the reliability for AD. Receiver operating characteristic (ROC) curves were applied to the results for clarification. To evaluate the correlation between two modalities, the regions of interest (ROIs) were set in the posterior cingulate gyri/precunei and parietotemporal region on 3D-SSP images, and mean Z-values were calculated. No significant difference was observed in the area under the ROC curve (AUC) between FDG-PET and IMP-SPECT images (FDG-PET 0.95, IMP-SPECT 0.94). However, a significant difference (P < 0.05) was observed in the AUC for the posterior cingulate gyri/precuneus (FDG-PET 0.94, IMP-SPECT 0.81). The sensitivity and specificity of each modality were 86%, and 97% for FDG-PET and 70% and 100% for IMP-SPECT. We could find no significant difference between FDG-PET and IMP-SPECT in terms of diagnosing moderate AD using 3D-SSP. There was a high correlation between the two modalities in the parietotemporal region (Spearman's r = 0.82, P < 0.001). The correlation in the posterior cingulate gyri/precunei region was lower than that in the parietotemporal region (Spearman's r = 0.63, P < 0.016).
doi_str_mv 10.1007/s11604-007-0132-8
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subjects Alzheimer Disease - diagnostic imaging
Alzheimer's disease
Antipyrine - analogs & derivatives
Blood flow
Cerebral blood flow
Computed tomography
Correlation
Cortex (parietal)
Emissions
Glucose
Glucose-6-Phosphate - analogs & derivatives
Humans
Hypometabolism
Imaging, Three-Dimensional
Medical imaging
Neurodegenerative diseases
Photon emission
Physicians
Positron emission
Positron emission tomography
Positron-Emission Tomography - methods
Single photon emission computed tomography
Tomography
Tomography, Emission-Computed, Single-Photon - methods
title Direct comparison study between FDG-PET and IMP-SPECT for diagnosing Alzheimer's disease using 3D-SSP analysis in the same patients
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