Evaluation of PET Scanner Performance in PET/MR and PET/CT Systems: NEMA Tests/PET/MR ve PET/BT Sistemlerinde PET Tarayicinin Performanslarinin Degerlendirilmesi: NEMA Testleri

Objective: The aim of the present study was to compare the performance of positron emission tomography (PET) component of PET/computed tomography (CT) with new emerging PET/magnetic resonance (MR) of the same vendor. Methods: According to National Electrical Manufacturers Association NU2-07, five se...

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Bibliographic Details
Published in:Molecular imaging and radionuclide therapy 2018-02, Vol.27 (1), p.10
Main Authors: Demir, Mustafa, Toklu, Turkay, Abuqbeitah, Mohammad, Ceitn, Huseyin, Sezgin, H. Sezer, Yeyin, Nami, Sonmezoglu, Kerim
Format: Article
Language:English
Subjects:
Comparative analysis
Magnetic resonance imaging
Medical research
Positron emission tomography
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Summary:Objective: The aim of the present study was to compare the performance of positron emission tomography (PET) component of PET/computed tomography (CT) with new emerging PET/magnetic resonance (MR) of the same vendor. Methods: According to National Electrical Manufacturers Association NU2-07, five separate experimental tests were performed to evaluate the performance of PET scanner of General Electric GE company; SIGNA[TM] model PET/MR and GE Discovery 710 model PET/CT. The main investigated aspects were spatial resolution, sensitivity, scatter fraction, count rate performance, image quality, count loss and random events correction accuracy. Results: The findings of this study demonstrated superior sensitivity (~ 4 folds) of PET scanner in PET/MR compared to PET/CT system. Image quality test exhibited higher contrast in PET/MR (~ 9%) compared with PET/CT. The scatter fraction of PET/MR was 43.4% at noise equivalent count rate (NECR) peak of 218 kcps and the corresponding activity concentration was 17.7 kBq/cc. Whereas the scatter fraction of PET/CT was found as 39.2% at NECR peak of 72 kcps and activity concentration of 24.3 kBq/cc. The percentage error of the random event correction accuracy was 3.4% and 3.1% in PET/MR and PET/CT, respectively. Conclusion: It was concluded that PET/MR system is about 4 times more sensitive than PET/CT, and the contrast of hot lesions in PET/MR was ~ 9% higher than PET/CT. These outcomes also emphasize the possibility to achieve excellent clinical PET images with low administered dose and/or a short acquisition time in PET/MR. Keywords: PET/MR, PET/CT, NEMA tests, quality control Oz Amac: Bu calismada son yillarda nukleer tipta rutin uygulamaya giren pozitron emisyon tomografisi/manyetik rezonans (PET/MR) goruntuleme sistemi ile PET/bilgisayarli tomografi (BT) goruntuleme sistemlerinde 'National Electrical Manufacturers Association' (NEMA) testlerinin yapilmasi ve sonuclarin karsilastirilmasi amaclandi. Yontem: NEMA NU2-07 testlerinden uzaysal ayirma gucu, hassasiyet, sacilma fraksiyonu kayip sayimlar ve rastgele olay olcumleri, goruntu kalitesi, sayim kayiplari rastgele olay duzeltme dogrulugu olmak uzere bes ayri deneysel calisma yapildi. Oz Bulgular: Sensitivite testi sonuclari degerlendirildiginde PET/MR sisteminin PET/BT sistemine gore yaklasik 4 kat daha ustun oldugu bulundu. Goruntu kalitesi test sonuclarindan sicak lezyon kontrastinin PET/MR'da %9 daha yuksek oldugu bulundu. PET/MR scatter orani gurultu esdegeri say
ISSN:2146-1414