After reviewing this educational exhibit, radiologists and trainees will have up-to-date knowledge about magnetic resonance imaging (MRI) safety in children with implanted medical devices. The following will be presented: 1) Basic MRI physics relating to safety risks in the presence of implanted (passive and active) medical devices, 2) MR Safety screening challenges specific to children, and 3) Review of newly developed or updated medical devices that present challenging pediatric MRI safety scenarios. MRI is the imaging modality of choice for assessing many pediatric conditions, providing excellent anatomic and pathologic detail without the use of ionizing radiation. However, there are significant potential hazards in the MR environment related to the static magnetic field and the spatial and time varying gradient fields, as well as the impact of radiofrequency pulses. These concerns may be further complicated/exacerbated by the presence of implanted medical devices. This educational exhibit will focus on reducing risk for children with implanted medical devices in the MR environment. Such devices may be subject to projectile/torsion forces, induced currents, and heating risks. Barriers to effective screening include limited MRI safety information for new passive and active implanted medical devices, incomplete documentation and patient/family education, and limited referring clinician awareness of potential safety risks. The use of sedation/anesthesia in pediatric patients reduces the ability to detect discomfort during MR imaging. Read More

Meeting name: SPR 2022 Annual Meeting & Postgraduate Course , 2022

Authors: Betz Lisa, Dillman Jonathan, Jones Blaise, Tkach Jean

Keywords: Implanted medical devices, Magnetic resonance imaging, Pediatric

Compressed SENSE (CS) facilitates significantly shorter MRI acquisition times. There is a paucity of data comparing quantitative MRI with regularly under-sampling schemes like SENSE to pseudorandom under-sampling schemes like CS. The purpose was to compare measurements of liver proton density fat fraction (PDFF), T2*, and stiffness between SENSE and CS techniques with identical MR acquisition parameters. Read More

Meeting name: SPR 2020 Annual Meeting & Postgraduate Course , 2020

Authors: Boyarko Alexander, Dillman Jonathan, Pednekar Amol, Tkach Jean, Trout Andrew

Keywords: Under-sampling, mDixon-Quant, Elastography

To compare liver shear stiffness estimates obtained by Automatic Liver Elasticity Calculation (ALEC) processing of two-dimensional (2D) gradient-recalled echo (GRE) magnetic resonance elastography (MRE) data to stiffness values obtained from standard-of-care manual processing. Read More

Meeting name: SPR 2020 Annual Meeting & Postgraduate Course , 2020

Authors: Gandhi Deep, Lake David, Dillman Jonathan, Braimah Adebayo, Dudley Jonathan, Tkach Jean, Pednekar Amol, Trout Andrew, Miethke Alexander, Heilman Jeremiah, Dzyubak Bogdan

Keywords: Elastography, MRI, Elasticity