The purpose of the study is to evaluate the physical performance of a Biograph mCT Flow R PET/CT system (Siemens Healthcare, Germany) and to. to fundamentally change how PET imaging is performed. Powered by Siemens’ revolutionary FlowMotion™ technology,. Biograph mCT Flow™ is the world’s first. Biograph mCT Flow with FlowMotion™ technology combines our standard- setting PET/CT with a unique system design that enables continuous motion of.
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In a study by Biogdaph et al. Furthermore, the axial placement of the off-center axial point sources was changed from one fourth of the axial FOV from the center to three eighth of the axial FOV from the center, respectively. Image quality results for 4: Benefit of time-of-flight in PET: All authors read and approved the final manuscript.
Biograph mCT Flow – Siemens Healthineers USA
In addition, a scan of the same region in CTM mode was performed with a table speed of 0. The clinically used settings of each system strongly depend on local on-site preferences. The future of hybrid imaging—part 2: Furthermore, the filling tolerance was expanded and a method for correcting the measured activity concentration for axially extended in-tube activity was introduced.
The scatter fraction was calculated to be For this evaluation, the measurements acquired for the evaluation of the scatter fraction and count rate performance was used.
Our data indicate a similar performance of the PET components of the mCT Flow and its predecessor system, the mCT [ 6 ] with the residual differences being discussed below. The sphere-to-background ratio is 4: The maximum and minimum errors for all activity concentrations are depicted in Fig. For the OSEM reconstruction, the results were slightly worse, which can be explained by the difference in applied post-filtering 3-mm FWHM vs 5-mm FWHM and the difference in iterations and subsets; the larger number of subsets in our study will lead to an enhancement of the noise in the image.
This article has been cited by other articles in PMC. Maximum modulus count rate error at peak NECR as well as maximum and minimum error for all activity biograpy are reported. The remaining two largest spheres were filled with non-radioactive water. Schematic diagram of a step-and-shoot SS left and continuous right table mcy CTM acquisition protocol.
Impact of point spread function modelling and time of flight on FDG uptake measurements in lung lesions using alternative filtering strategies.
Biograph mCT 20 Excel
mtc Image quality phantom hot spheres at the center of the axial FOV The calculated activities at the start of the second scan were 5.
Also, advanced acquisition protocols like described by Karakatsanis et al. Axial sensitivity profile for the measurements with the line source in the center of the field of view and at cm radial offset. Based on this relationship, a considerable decrease in detectability is expected when the acquisition time is reduced by a factor of 2, which is inevitably related to image contrast.
Biograph mCT Flow
This set of parameters should be defined by the vendor and be delivered with the system, e. Table speeds range from 0.
Finally, the results of these measurements were compared with published values from its predecessor, the Biograph biograp system [ 6 ].
Seminars in Nuclear Medicine. Conclusions The spatial resolution, biograpu, scatter fraction, and count rates were in concordance with the published values for the predecessor system, the Biograph mCT. However, this study was performed on a different system with an axial FOV of Central slice of the image quality phantom for sequential a and CTM b acquisition modes.
Biograph mCT 20 Excel – Siemens Healthineers Global
Furthermore, the accuracy of scatter and attenuation corrections in both acquisition modes was evaluated. Time of flight in PET revisited. The sphere-to-background ratio is 8: System true event rate, random event rate, scatter event rate, NECR, and the scatter fraction are reported.
Nevertheless, based on the findings of Molina-Duran and colleges, [ 33 ] not the entire increase in BG variability can be explained from the decrease in count density.
Despite the modifications from the to the standard, the results for the system sensitivity, the count rates, NECR, scatter fraction, corrections for count losses and random measurements as well as the count rate error are in accordance with published values for the mCT system [ 6 ] following the NEMA NU standard. This information can be used to significantly improve biiograph image signal-to-noise ratio SNR mcg the reconstructed PET images, thus, allowing for better image quality and shorter acquisition times [ 89 ].