Suppressing bladder artifacts in bone SPECT of the pelvis.
Détails
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Etat: Public
Version: Final published version
Licence: Non spécifiée
It was possible to publish this article open access thanks to a Swiss National Licence with the publisher.
Etat: Public
Version: Final published version
Licence: Non spécifiée
It was possible to publish this article open access thanks to a Swiss National Licence with the publisher.
ID Serval
serval:BIB_9997734FCD66
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Suppressing bladder artifacts in bone SPECT of the pelvis.
Périodique
Annals of Nuclear Medicine
ISSN
0914-7187
Statut éditorial
Publié
Date de publication
2007
Peer-reviewed
Oui
Volume
21
Numéro
6
Pages
339-344
Langue
anglais
Notes
Publication types: Controlled Clinical Trial ; Journal Article ; Research Support, Non-U.S. Gov't ; Validation Studies - Publication Status: ppublish
Résumé
OBJECTIVE: Bladder-filling reconstruction artifacts have a detrimental effect on the image quality of pelvic bone single photon emission computed tomography (SPECT). Using a simple protocol consisting of forced diuresis coupled with intravenous (IV) hydration, this study was undertaken to obtain an artifact-free pelvic SPECT after discarding the residual urinary activity. METHODS: Thirty patients were enrolled. In group I, pelvic SPECT was performed directly after normal void, whereas in group II, SPECT was preceded by IV injection of 0.5 mg/kg furosemide (maximum 40 mg) coupled with IV infusion of 500 cc of physiologic saline. Bladder-filling reconstruction artifacts were analyzed in group I patients, who had their images reconstructed using both filtered backprojection and iterative algorithms, both qualitatively and quantitatively by means of regions of interest (ROIs) drawn around the artifact-bearing bone areas as well as the corresponding contralateral sites. For group II patients, besides visual analysis, ROIs were placed over the sites corresponding to those of the group I patients. In every patient, total counts of each ROI were normalized to a reference ROI placed over the sacrum, and a ratio was created. RESULTS: Using filtered backprojection, two forms of artifacts were identified in group I patients: first, a streak pattern that extended to the sacro-iliac joint in nine (60%) patients, the hip joint in five (33%), the superior pubic rami in four (27%), the sacrum in three (20%), and the ischium in one (6%); second, a count loss subtype which extended to the hip joints in nine (60%) patients. Corresponding values after iterative reconstruction were two (13%) for the sacro-iliac joint, three (20%) for the hip joint, one (6%) for the superior pubic ramus, and one (6%) for the sacrum. In five (33%) patients, residual count loss artifacts were still identifiable after iterative reconstruction. However in group II, no such effects were observed because the bladder activity reached near background level in 14 (93%) of 15 patients after three successive voids with a 3.5-fold decrease in the mean value of total bladder count in comparison with group I patients. A statistically significant difference was found between artifact- and non-artifact-harboring ROIs in group I whichever the method used for reconstruction, whereas the values of right and left hemi-pelvis ROIs/sacrum in group II were almost identical. CONCLUSIONS: Forced diuresis coupled with parenteral hydration facilitates the acquisition of an artifact-free pelvic SPECT. Especially for clinical questions that focus on femoral heads and pubic bones, applying the aforementioned protocol may improve the diagnostic accuracy of pelvic bone SPECT.
Mots-clé
Adolescent, Adult, Aged, Aged, 80 and over, Artifacts, Diuretics, Female, Furosemide, Humans, Image Enhancement, Image Interpretation, Computer-Assisted, Infusions, Parenteral, Male, Middle Aged, Pelvic Bones, Reproducibility of Results, Sensitivity and Specificity, Tomography, Emission-Computed, Single-Photon, Urinary Bladder, Water
Pubmed
Web of science
Open Access
Oui
Création de la notice
26/02/2008 15:46
Dernière modification de la notice
14/02/2022 8:56