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| Reference : Hot and cold contrasts in high resolution Tc-99m planar scintigraphy: a survey of fifty-... |
| Scientific journals : Article | |||
| Human health sciences : Radiology, nuclear medicine & imaging | |||
| http://hdl.handle.net/2268/63416 | |||
| Hot and cold contrasts in high resolution Tc-99m planar scintigraphy: a survey of fifty-two camera heads using the PICKER thyroid phantom | |
| English | |
Seret, Alain  [Université de Liège - ULg > Département de physique > Imagerie médicale expérimentale >] | |
| 2010 | |
| Physica Medica : An International Journal Devoted to the Applications of Physics to Medicine and Biology : Official Journal of the Italian Association of Biomedical Physics (AIFB) [=PM] | |
| 26 | |
| 3 | |
| 166-172 | |
| International | |
| 1120-1797 | |
| [en] Gamma-camera ; Quality control ; Static mode ; Picker thyroid phantom ; High resolution collimator ; Technetium-99m ; Contrast ; Sensitivity | |
| [en] This study aimed at comparing the sensitivity and hot and cold contrasts obtained when imaging the Picker thyroid phantom using gamma cameras fitted with either their ultra-high or high-resolution low energy parallel hole collimator.
Seventeen camera models from Elscint, General Electric, Siemens and Sopha Medical Vision were involved in the study for a total of 30 cameras and 52 camera heads. A single operator conducted the study in order to minimize the impact of human factors. The phantom contained about 74 MBq 99mTc and was imaged at 10-cm from the collimator face with the energy window recommended by the camera manufacturer. A total of 1 million counts were accumulated. Hot and cold contrasts were in mean about 0.05 higher when using an ultra-high-resolution than when using a high-resolution low energy collimator. This higher contrast was obtained at the expense of a mean reduction in sensitivity of 30%. In particular, Elscint cameras demonstrated a 30% lower sensitivity whatever the collimator type. The Sopha Medical Vision DST and DSX cameras and the General Electric Magicam camera offered the lowest contrasts among the cameras with a high-resolution collimator. Although this was accompanied by a higher than the mean sensitivity for the DST and DSX, the Magicam demonstrated sensitivity roughly identical to the mean of all the cameras with a high-resolution collimator. | |
| Researchers ; Professionals ; Students ; General public | |
| http://hdl.handle.net/2268/63416 | |
| 10.1016/j.ejmp.2009.06.003 | |
| http://intl.elsevierhealth.com/journals/ejmp |
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