The Effect of Low Dose CT Matrix Size Variation on Qualitative and Semi-Quantitative Analysis of Positron Emission Tomography (PET) Images | ||||
| Egyptian Journal Nuclear Medicine | ||||
| Article 7, Volume 8, Issue 8, December 2013, Page 63-69 PDF (485.96 K) | ||||
| Document Type: Original Paper, Physics | ||||
| DOI: 10.21608/egyjnm.2013.5461 | ||||
 View on SCiNiTO | ||||
| Author | ||||
Hesham Abdelgawad 
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| Nuclear Medicine Unit, Faculty of Medicine, Cairo University, Egypt. | ||||
| Abstract | ||||
| Objective: The purpose of the study was to evaluate the qualitative and semiquantitative effects of using different lowdose computed tomography (CT) matrix sizes for attenuation correction of PET images. Methods: Co-registered 2-[F18]- fluoro-2-deoxy-D-glucose (FDG)-PET and CT images were acquired using a combined PET/CT scanner according to a standardized protocol. PET/CT reconstruction was repeated using default reconstruction protocols with different matrix sizes for low dose CT (512,768 and 1024) in 25 patients. The resulting images were analyzed qualitatively “image quality” and semi-quantitatively using “mean SUV & Signal to Noise Ratio (SNR)”. Results: No significant difference in the resulting attenuated corrected images reconstructed with the different matrix sizes either qualitatively or semiquantitatively. Conclusion: The matrix size of the low dose CT used in the attenuation correction of PET images does not affect the image quality or semi-quantitative parameters. | ||||
| Keywords | ||||
| PET/CT; Attenuation correction; Matrix Size; SUV; SNR | ||||
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