124 Objectives Attenuation correction is one of the major challenges in the development of
simultaneous PET-MR scanners. Predicting attenuation values from MR images is difficult …

PET and MRI are established clinical tools which provide complementary information, but
clinical workflow limits widespread clinical application of both modalities in combination. The …

Integrated PET/MR systems are becoming increasingly popular in clinical and research
applications. Quantitative PET reconstruction requires correction for γ-photon attenuations …

A challenge for hybrid PET/MRI imaging is the determination of the photon attenuation map
to correct the acquired PET data. Segmentation of adapted MRI sequence data in four tissue …

Accurate localization and uptake quantification of lesions in the chest and abdomen using
PET imaging is challenged by respiratory motion occurring during the exam. This work …

Purpose: In hybrid medical imaging devices combining positron emission tomography (PET)
with magnetic resonance imaging, PET attenuation correction remains challenging. Known …

The hybridization of magnetic resonance imaging (MRI) with positron emission tomography
(PET) or single photon emission computed tomography (SPECT) enables the collection of …

Attenuation correction (AC) must be applied to provide accurate measurements of PET
tracer activity concentrations. Due to the limited space available in PET/MR scanners, MR …

Magnetic resonance-based attenuation correction (MRAC) is important for accurate
quantification of the uptake of PET tracers in combined PET/MR scanners. However, current …

In standard segmentation-based MRI-guided attenuation correction (MRAC) of PET data on
hybrid PET/MRI systems, the inter/intra-patient variability of linear attenuation coefficients …