Renal 99Tcm-DMSA SPET and planar imaging
Autor: | M. E. Solano, A. Hernandez, Rodriguez Jl, Fraxedas R, Alejandro Perera, Reyes L |
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Rok vydání: | 1997 |
Předmět: |
Adult
Planar Imaging media_common.quotation_subject Contrast effect Technetium-99m-DMSA chemistry.chemical_element Kidney Technetium Humans Medicine Contrast (vision) Tissue Distribution Radiology Nuclear Medicine and imaging media_common Tomography Emission-Computed Single-Photon Pyelonephritis business.industry Reproducibility of Results Organotechnetium Compounds General Medicine Models Theoretical Image contrast chemistry Automated algorithm Technetium Tc 99m Dimercaptosuccinic Acid Succimer business Nuclear medicine Algorithms Tomography Emission-Computed |
Zdroj: | Nuclear Medicine Communications. 18:556-561 |
ISSN: | 0143-3636 |
Popis: | Previous studies have suggested that more defects are detected on SPET than on planar DMSA images. The aim of this study was to evaluate differences between planar and SPET imaging. Sixty-four kidneys from pyelonephritic patients were studied using both techniques. An automated algorithm for reorientation and centring of the SPET images was used to minimize inter-observer variability. Reduced uptake and contour defects showed different localization on planar and SPET imaging. Coincidence of defects on both types of image was low. We also noted a dependence on defect frequency content for detectability. Image contrast played a noticeable role in the detection of defects. Differences in contrast between SPET and planar images may be responsible for the variable success in the detection of defects. Contour defects are seen more frequently on tomographic slices, whereas reduced uptake defects are seen more frequently on planar images. A difference is also noted between the cortical and calyceal zones for differently contrasted lesions. SPET and planar DMSA images can potentially provide a different diagnosis of renal lesions. |
Databáze: | OpenAIRE |
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