TY - GEN
T1 - PET performance of the GEMINI TF PET - MR
T2 - 2010 IEEE Nuclear Science Symposium, Medical Imaging Conference, NSS/MIC 2010 and 17th International Workshop on Room-Temperature Semiconductor X-ray and Gamma-ray Detectors, RTSD 2010
AU - Ojha, Navdeep
AU - Griesmer, Jerome
AU - Hu, Zhiqiang
AU - Shao, Ling
AU - Izquierdo, David
AU - MacHac, Josef
AU - Ratib, Osman
AU - Zaidi, Habib
AU - Fuster, Valentin
AU - Fayad, Zahi A.
PY - 2010
Y1 - 2010
N2 - The GEMINI TF PET-MRI (Philips Healthcare, Cleveland, OH) is a newly released whole body hybrid imaging system with a Philips Achieva 3T system and a Philips TF (TruFlight) PET. We report the standard NEMA NU2 measurements for the scanner. Compared to PET-CT, modifications to the PET were made to avoid mutual system interference and deliver uncompromising performance which is equivalent to the standalone systems. The PET gantry was redesigned to introduce magnetic shielding for the PMTs. Stringent electromagnetic noise requirements of the MR system necessitated the removal of PET gantry electronics to be housed in the PET-MR equipment room. All PET calibrations and measurements were done with the MRI ramped to 3T, shimmed and calibrated. Measurements were performed as described in NEMA standard manual. GEMINI TF PET-CT typical NEMA values were compared to PET-MR (n4 for PET-MR data). Spatial resolution and sensitivity were comparable to PET-CT results. Timing resolution and energy resolution of the PET-MR system (not NEMA standard measurements) were measured to be 520 ps and 12%, respectively. Image quality measurements performed with IEC phantom yielded results comparable to PET-CT. The NEMA results obtained with PET-MR are equivalent to typical GEMINI TF PET-CT results. System energy and timing resolution were comparable to PET-CT demonstrating the effect of magnetic shielding to maintain the PMTs in normal flux levels. In conclusion, we report the design of a whole-body hybrid PET-MRI system where PET performance is comparable to standalone GEMINI TF PET-CT system.
AB - The GEMINI TF PET-MRI (Philips Healthcare, Cleveland, OH) is a newly released whole body hybrid imaging system with a Philips Achieva 3T system and a Philips TF (TruFlight) PET. We report the standard NEMA NU2 measurements for the scanner. Compared to PET-CT, modifications to the PET were made to avoid mutual system interference and deliver uncompromising performance which is equivalent to the standalone systems. The PET gantry was redesigned to introduce magnetic shielding for the PMTs. Stringent electromagnetic noise requirements of the MR system necessitated the removal of PET gantry electronics to be housed in the PET-MR equipment room. All PET calibrations and measurements were done with the MRI ramped to 3T, shimmed and calibrated. Measurements were performed as described in NEMA standard manual. GEMINI TF PET-CT typical NEMA values were compared to PET-MR (n4 for PET-MR data). Spatial resolution and sensitivity were comparable to PET-CT results. Timing resolution and energy resolution of the PET-MR system (not NEMA standard measurements) were measured to be 520 ps and 12%, respectively. Image quality measurements performed with IEC phantom yielded results comparable to PET-CT. The NEMA results obtained with PET-MR are equivalent to typical GEMINI TF PET-CT results. System energy and timing resolution were comparable to PET-CT demonstrating the effect of magnetic shielding to maintain the PMTs in normal flux levels. In conclusion, we report the design of a whole-body hybrid PET-MRI system where PET performance is comparable to standalone GEMINI TF PET-CT system.
KW - PET-MR
KW - performance measurement
UR - http://www.scopus.com/inward/record.url?scp=79960304681&partnerID=8YFLogxK
U2 - 10.1109/NSSMIC.2010.5874129
DO - 10.1109/NSSMIC.2010.5874129
M3 - Conference contribution
AN - SCOPUS:79960304681
SN - 9781424491063
T3 - IEEE Nuclear Science Symposium Conference Record
SP - 2013
EP - 2015
BT - IEEE Nuclear Science Symposuim and Medical Imaging Conference, NSS/MIC 2010
Y2 - 30 October 2010 through 6 November 2010
ER -