PET/MRI insert using digital SiPMs: Investigation of MR-compatibility

Jakob Wehner; Bjoern Weissler; Peter Dueppenbecker; Pierre Gebhardt; David Schug; Walter Ruetten; Fabian Kiessling; Volkmar Schulz

doi:10.1016/j.nima.2013.08.077

PET/MRI insert using digital SiPMs: Investigation of MR-compatibility

Jakob Wehner^*, Bjoern Weissler, Peter Dueppenbecker, Pierre Gebhardt, David Schug, Walter Ruetten, Fabian Kiessling, Volkmar Schulz

^*Corresponding author for this work

Biomedical Engineering Department

Research output: Contribution to journal › Conference paper › peer-review

55 Citations (Scopus)

Abstract

In this work, we present an initial MR-compatibility study performed with the world's first preclinical PET/MR insert based on fully digital silicon photo multipliers (dSiPM). The PET insert allows simultaneous data acquisition of both imaging modalities and thus enables the true potential of hybrid PET/MRI. Since the PET insert has the potential to interfere with all of the MRI's subsystems (strong magnet, gradients system, radio frequency (RF) system) and vice versa, interference studies on both imaging systems are of great importance to ensure an undisturbed operation. As a starting point to understand the interference, we performed signal-to-noise ratio (SNR) measurements as well as dedicated noise scans on the MRI side to characterize the influence of the PET electronics on the MR receive chain. Furthermore, improvements of sub-components’ shielding of the PET system are implemented and tested inside the MRI. To study the influence of the MRI on the PET performance, we conducted highly demanding stress tests with gradient and RF dominated MR sequences. These stress tests unveil a sensitivity of the PET's electronics to gradient switching.

Original language	English
Article number	N/A
Pages (from-to)	116-121
Number of pages	6
Journal	Nuclear Instruments & Methods In Physics Research Section A, Accelerators, Spectrometers, Detectors And Associated Equipment
Volume	734
Issue number	Part B
DOIs	https://doi.org/10.1016/j.nima.2013.08.077
Publication status	Published - 11 Jan 2014

Keywords

PET/MRI
Digital SiPM
MR-compatibility

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10.1016/j.nima.2013.08.077

Cite this

Wehner, J., Weissler, B., Dueppenbecker, P., Gebhardt, P., Schug, D., Ruetten, W., Kiessling, F., & Schulz, V. (2014). PET/MRI insert using digital SiPMs: Investigation of MR-compatibility. Nuclear Instruments & Methods In Physics Research Section A, Accelerators, Spectrometers, Detectors And Associated Equipment, 734(Part B), 116-121. Article N/A. https://doi.org/10.1016/j.nima.2013.08.077

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title = "PET/MRI insert using digital SiPMs: Investigation of MR-compatibility",

abstract = "In this work, we present an initial MR-compatibility study performed with the world's first preclinical PET/MR insert based on fully digital silicon photo multipliers (dSiPM). The PET insert allows simultaneous data acquisition of both imaging modalities and thus enables the true potential of hybrid PET/MRI. Since the PET insert has the potential to interfere with all of the MRI's subsystems (strong magnet, gradients system, radio frequency (RF) system) and vice versa, interference studies on both imaging systems are of great importance to ensure an undisturbed operation. As a starting point to understand the interference, we performed signal-to-noise ratio (SNR) measurements as well as dedicated noise scans on the MRI side to characterize the influence of the PET electronics on the MR receive chain. Furthermore, improvements of sub-components{\textquoteright} shielding of the PET system are implemented and tested inside the MRI. To study the influence of the MRI on the PET performance, we conducted highly demanding stress tests with gradient and RF dominated MR sequences. These stress tests unveil a sensitivity of the PET's electronics to gradient switching.",

keywords = "PET/MRI, Digital SiPM, MR-compatibility",

author = "Jakob Wehner and Bjoern Weissler and Peter Dueppenbecker and Pierre Gebhardt and David Schug and Walter Ruetten and Fabian Kiessling and Volkmar Schulz",

year = "2014",

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doi = "10.1016/j.nima.2013.08.077",

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Wehner, J, Weissler, B, Dueppenbecker, P, Gebhardt, P, Schug, D, Ruetten, W, Kiessling, F & Schulz, V 2014, 'PET/MRI insert using digital SiPMs: Investigation of MR-compatibility', Nuclear Instruments & Methods In Physics Research Section A, Accelerators, Spectrometers, Detectors And Associated Equipment, vol. 734, no. Part B, N/A, pp. 116-121. https://doi.org/10.1016/j.nima.2013.08.077

PET/MRI insert using digital SiPMs: Investigation of MR-compatibility. / Wehner, Jakob; Weissler, Bjoern; Dueppenbecker, Peter et al.
In: Nuclear Instruments & Methods In Physics Research Section A, Accelerators, Spectrometers, Detectors And Associated Equipment, Vol. 734, No. Part B, N/A, 11.01.2014, p. 116-121.

Research output: Contribution to journal › Conference paper › peer-review

TY - JOUR

T1 - PET/MRI insert using digital SiPMs

T2 - Investigation of MR-compatibility

AU - Wehner, Jakob

AU - Weissler, Bjoern

AU - Dueppenbecker, Peter

AU - Gebhardt, Pierre

AU - Schug, David

AU - Ruetten, Walter

AU - Kiessling, Fabian

AU - Schulz, Volkmar

PY - 2014/1/11

Y1 - 2014/1/11

N2 - In this work, we present an initial MR-compatibility study performed with the world's first preclinical PET/MR insert based on fully digital silicon photo multipliers (dSiPM). The PET insert allows simultaneous data acquisition of both imaging modalities and thus enables the true potential of hybrid PET/MRI. Since the PET insert has the potential to interfere with all of the MRI's subsystems (strong magnet, gradients system, radio frequency (RF) system) and vice versa, interference studies on both imaging systems are of great importance to ensure an undisturbed operation. As a starting point to understand the interference, we performed signal-to-noise ratio (SNR) measurements as well as dedicated noise scans on the MRI side to characterize the influence of the PET electronics on the MR receive chain. Furthermore, improvements of sub-components’ shielding of the PET system are implemented and tested inside the MRI. To study the influence of the MRI on the PET performance, we conducted highly demanding stress tests with gradient and RF dominated MR sequences. These stress tests unveil a sensitivity of the PET's electronics to gradient switching.

AB - In this work, we present an initial MR-compatibility study performed with the world's first preclinical PET/MR insert based on fully digital silicon photo multipliers (dSiPM). The PET insert allows simultaneous data acquisition of both imaging modalities and thus enables the true potential of hybrid PET/MRI. Since the PET insert has the potential to interfere with all of the MRI's subsystems (strong magnet, gradients system, radio frequency (RF) system) and vice versa, interference studies on both imaging systems are of great importance to ensure an undisturbed operation. As a starting point to understand the interference, we performed signal-to-noise ratio (SNR) measurements as well as dedicated noise scans on the MRI side to characterize the influence of the PET electronics on the MR receive chain. Furthermore, improvements of sub-components’ shielding of the PET system are implemented and tested inside the MRI. To study the influence of the MRI on the PET performance, we conducted highly demanding stress tests with gradient and RF dominated MR sequences. These stress tests unveil a sensitivity of the PET's electronics to gradient switching.

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KW - MR-compatibility

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DO - 10.1016/j.nima.2013.08.077

M3 - Conference paper

SN - 0168-9002

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EP - 121

JO - Nuclear Instruments & Methods In Physics Research Section A, Accelerators, Spectrometers, Detectors And Associated Equipment

JF - Nuclear Instruments & Methods In Physics Research Section A, Accelerators, Spectrometers, Detectors And Associated Equipment

IS - Part B

M1 - N/A

ER -

PET/MRI insert using digital SiPMs: Investigation of MR-compatibility

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Keywords

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