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Design and performance evaluation of a whole-body Ingenuity TF PET–MRI system
Open accessAbstract
The Ingenuity TF PET-MRI is a newly released whole-body hybrid PET-MR imaging system with a Philips time-of-flight GEMINI TF PET and Achieva 3T X-series MRI system. Compared to PET-CT, modifications to the positron emission tomography (PET) gantry 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 photomultiplier tubes (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. We report the standard NEMA measurements for the PET scanner. PET imaging and performance measurements were done at Geneva University Hospital as described in the NEMA Standards NU 2-2007 manual. The scatter fraction (SF) and noise equivalent count rate (NECR) measurements with the NEMA cylinder (20 cm diameter) were repeated for two larger cylinders (27 cm and 35 cm diameter), which better represent average and heavy patients. A NEMA/IEC torso phantom was used for overall assessment of image quality. The transverse and axial resolution near the center was 4.7 mm. Timing and energy resolution of the PET-MR system were measured to be 525 ps and 12%, respectively. The results were comparable to PET-CT systems demonstrating that the effect of design modifications required on the PET system to remove the harmful effect of the magnetic field on the PMTs was negligible. The absolute sensitivity of this scanner was 7.0 cps kBq(-1), whereas SF was 26%. NECR measurements performed with cylinders having three different diameters, and image quality measurements performed with IEC phantom yielded excellent results. The Ingenuity TF PET-MRI represents the first commercial whole-body hybrid PET-MRI system. The performance of the PET subsystem was comparable to the GEMINI TF PET-CT system using phantom and patient studies. It is conceived that advantages of hybrid PET-MRI will become more evident in the near future.
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Citations
Cites
PET/MRI: Paving the Way for the Next Generation of Clinical Multimodality Imaging Applications
Pichler, B. J., Kolb, A., Nägele, T., & Schlemmer, H.-P. (2010) · Journal of Nuclear Medicine · doi:10.2967/jnumed.109.061853 · Cited by 418
Cited by
Performance Measurements of the Siemens mMR Integrated Whole-Body PET/MR Scanner
Delso, G., Fürst, S., Jakoby, B., Ladebeck, R., Ganter, C., Nekolla, S. G., Schwaiger, M., & Ziegler, S. I. (2011) · Journal of Nuclear Medicine · doi:10.2967/jnumed.111.092726 · Cited by 874
Mehranian, A., Arabi, H., & Zaidi, H. (2016) · Medical Physics · doi:10.1118/1.4941014 · Cited by 152
Beyer, T., Lassen, M. L., Boellaard, R., Delso, G., Yaqub, M., Sattler, B., & Quick, H. H. (2016) · Magnetic Resonance Materials in Physics, Biology and Medicine · doi:10.1007/s10334-015-0505-4 · Cited by 66
Boellaard, R., Rausch, I., Beyer, T., Delso, G., Yaqub, M., Quick, H. H., & Sattler, B. (2015) · Medical Physics · doi:10.1118/1.4930962 · Cited by 62
Systematic Evaluation of Phantom Fluids for Simultaneous PET/MR Hybrid Imaging
Ziegler, S., Braun, H., Ritt, P., Hocke, C., Kuwert, T., & Quick, H. H. (2013) · Journal of Nuclear Medicine · doi:10.2967/jnumed.112.116376 · Cited by 50
Metadata
- Authors
- Zaidi, H., Ojha, N., Morich, M., Griesmer, J., Hu, Z., Maniawski, P., Ratib, O., Izquierdo-Garcia, D., Fayad, Z. A., & Shao, L.
- Venue
- Physics in Medicine and Biology
- Publisher
- IOP Publishing
- Published
- 2011-04-20
- Volume
- 56
- Issue
- 10
- Pages
- 3091-3106
- ISSN
- 0031-9155 (ISSN-L)
- 1361-6560
- OpenAlex
- W1971098086
- Cited by
- 402
- References
- 1
- FWCI
- 32.86
- Type
- journal article
- Language
- en
- Open access
- bronze
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- Zaidi, H., Ojha, N., Morich, M., Griesmer, J., Hu, Z., Maniawski, P., Ratib, O., Izquierdo-Garcia, D., Fayad, Z. A., & Shao, L. (2011). Design and performance evaluation of a whole-body Ingenuity TF PET–MRI system. Physics in Medicine and Biology. https://doi.org/10.1088/0031-9155/56/10/013
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