A comparison of contrast and sensitivity in Tc-99m thyroid scintigraphy between nine nuclear medicine centres of a geographic
Rev. med. nucl. Alasbimn j
;
8(32)apr. 2006. ilus, tab
Article
in English
| LILACS
| ID: lil-444091
ABSTRACT
Purpose:
To compare with Pickers thyroid phantom the contrast and the sensitivity obtained with ten cameras used for Tc-99m thyroid scintigraphy in a geographic area.Methods:
The phantom image was acquired with the collimator and the acquisition parameters used in clinical practice. Contrast for the 12 mm hot (H12) and for the 9 and 12 mm cold (C9, C12) nodules was measured, as well as sensitivity (S in cp/MBq/s).Results:
Measured minimum-maximum values were as follows. Pinhole cameras (6) S = 62-131; H12 = 0.66-0.77; C12 = 0.77-0.90; C9 = 0.59-0.76. Non-pinhole cameras (4) S = 55-85; H12 = 0.52-0.59; C12 = 0.62-0.75; C9 = 0.30-50.Conclusions:
The pinhole collimators outclass the parallel hole ones in contrast. The sensitivity was the highest (S > 96) for five of the six pinhole collimators. As a direct consequence of this study, two centres decided to switch to pinhole collimator for thyroid scintigraphy.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Radiometry
/
Thyroid Gland
/
Contrast Sensitivity
/
Radionuclide Imaging
Type of study:
Diagnostic study
/
Evaluation studies
Limits:
Humans
Language:
English
Journal:
Rev. med. nucl. Alasbimn j
Journal subject:
Nuclear Medicine
Year:
2006
Type:
Article
Affiliation country:
Belgium
Institution/Affiliation country:
Université de Liège/BE
Similar
MEDLINE
...
LILACS
LIS