BIOGRAPH MCT PDF

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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Biograph mCT Flow

All measurements were performed biogeaph the site of the clinical installation of the system between August and December Seminars in Nuclear Mcg. In a study by Tong et al. Maximum modulus count rate error at peak NECR as well as maximum and minimum error for all activity concentrations are reported. The CTM scans were acquired with a table speed of 1.

A second scan of the same region in CTM mode was acquired at a table speed of 0.

Biograph mCT 20 Excel – Siemens Healthineers Global

Ethical approval All procedures performed in studies involving human participants were approved by the regional ethics committee and were in accordance with the Helsinki biogfaph. Image quality is very similar.

This is further supported by the findings of Braun and colleges [ 34 ] who showed increased noise in CTM acquisitions in comparison to SS acquisitions with equivalent numbers of true events.

Published online Oct Discussion 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 elevated background variability is assumed to be caused by the choice of the table speed and the data processing techniques specific to CTM acquisitions.

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This relationship was modeled from an empirical logarithmic relationship. Lesion detectability depends on the acquisition time [ 31 ]. Image contrast recovery values sphere-to-background of 8: Table speeds range from 0. While the difference in error may be small, the exclusion of the end slices as permitted in the NEMA NU protocol should be followed anyway, as these end slices often suffer from high noise levels due to the low sensitivity of the scanner at the end of the axial FOV Fig.

The patient handling system PHS contains a horizontal magnetic drive system that enables a continuous table motion with a positioning accuracy of less than 0. Online random subtraction was applied from the delayed coincidence window to account also for the intrinsic LSO radioactivity [ 23 ].

Thus, users may opt for applying PSF and other geometric corrections to the data, which inevitable makes inter-system comparisons more difficult. For an axial FOV excluding the low sensitivity regions at the axial endpoints of the scan range a hypothetical scan with an unlimited number of bed positionsa 4-min acquisition per bed position corresponds to a table speed of 0. The CTM acquisition followed the sequential subsequently. The contrast values, background variability, and the accuracy of attenuation and scatter correction for the lung insert were evaluated with an in-house developed plug-in for ImageJ U.

Nonetheless, increased noise was observed in the images acquired in SS mode Fig. Scintillator crystals for PET.

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The sphere-to-background ratio is 8: For this acquisition protocol, planning and scanning are restricted by the fixed size of the detector array.

Online random subtraction was applied from a delayed coincidence window. Previous studies have shown that by incorporating PSF modeling into the image reconstruction, an overestimation of the CRC can be observed, in particular, when no post-filtering is biogarph [ 252829 ].

National Electrical Manufacturers Association.

The scatter fraction was These settings were selected to cover the same axial FOV in the same time as performed with the IQ phantom measurements. Accuracy of count losses and random corrections For this evaluation, the measurements acquired for the evaluation of the scatter fraction and count rate performance was used. 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 20 Excel

The relative count rate error at the activity concentration of the NECR peak Support Center Support Center.

Schematic diagram of a step-and-shoot SS left and continuous right biogrsph motion CTM acquisition protocol.

Sensitivity measurements were based on a cm-long polyethylene tube, filled with 4. Resolution modeling in PET imaging: