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Performance evaluation of a large axial field-of-view PET scanner: SET-2400W
T Fujiwara1, S Watanuki, S Yamamoto
1Division of Cyclotron Nuclear Medicine, Cyclotron and Radioisotope Center, Tohoku University, Sendai, Japan. fujiwara@cyric.tohoku.ac.jp
Annals of Nuclear Medicine
|February 14, 1998
Summary
The new SET-2400W whole-body PET scanner offers a large 20 cm axial field of view, demonstrating excellent sensitivity and spatial resolution for advanced brain and whole-body imaging.
Area of Science:
- Medical Imaging
- Nuclear Medicine
- Instrumentation
Background:
- Positron Emission Tomography (PET) is crucial for medical diagnostics.
- Advancements in scanner technology are needed to improve imaging capabilities.
- Whole-body PET imaging requires scanners with large fields of view.
Purpose of the Study:
- To evaluate the physical performance of the newly designed SET-2400W whole-body PET scanner.
- To assess the scanner's sensitivity, spatial resolution, and count rate capabilities.
- To demonstrate the clinical utility of the large axial field-of-view scanner.
Main Methods:
- The SET-2400W scanner, featuring 112 BGO detector units arranged in 32 rings, was characterized.
- Sensitivity was measured using a 20-cm cylindrical phantom in both 2D and 3D modes.
- Spatial resolution (in-plane, tangential, radial, axial) and scatter fraction were assessed.
- Maximum count rates were determined for 2D and 3D clinical modes.
Main Results:
- The scanner achieved a sensitivity of 6.1 kcps/kBq/ml (2D) and 48.6 kcps/kBq/ml (3D).
- In-plane spatial resolution was 3.9 mm FWHM at the center, with average axial resolution of 4.5 mm FWHM.
- Scatter fractions were 8% (2D) and 40% (3D), with maximum count rates of 230 kcps (2D) and 350 kcps (3D).
Conclusions:
- The SET-2400W PET scanner exhibits high performance characteristics.
- Its large axial field of view is beneficial for whole-body and brain imaging applications.
- The scanner shows significant potential for clinical use in PET studies.