Conveners
Session 6 - Whole-body and dedicated organ MR-PET
- Stan Majewski (West Virginia University)
Didier Benoit
(Rigshospitalet)
19/05/2015, 11:00
6 - Whole-body and dedicated organ MR-PET
Talk
For a quantitative analysis in positron emission tomography (PET) or single-photon emission computed tomography (SPECT), attenuation correction (AC) is mandatory. CT-scans or transmission scans are common tools for determination of the attenuation μ-map, but in the case of a PET/MR hybrid system it is difficult to associate one of these scans. Many techniques have been developed in order to...
Mohammad Mehdi Khalighi
(GE Healthcare)
19/05/2015, 11:20
6 - Whole-body and dedicated organ MR-PET
Talk
In a functional PET/MR study, it is difficult to get good temporal resolution of activity distribution from PET images because of the need to image for a certain length of time to get sufficient count statistics (image SNR). Time-of-flight (TOF) reconstruction can be used to increase PET images SNR and therefore increase the temporal resolution. Five patients were injected with 410±80 MBq of...
Jörg Mauler
(Institute of Neuroscience and Medicine, Forschungszentrum Jülich, Jülich, Germany)
19/05/2015, 11:40
6 - Whole-body and dedicated organ MR-PET
Talk
In addition to MR imaging, PET imaging of O-(2-[18F]Fluorethyl)-L-Tyrosine (FET) uptake provides information on brain tumour extent and metabolic activity [1]. Similarly, MRS has been shown to be of value for distinguishing high- from low-grade gliomas [2]. Based on 2D spatially resolved MRSI, an overlap between 18FET uptake and the choline/N-acetyl-aspartate (Cho/NAA) ratio of more than 75 %...
Martin J Willemink
(Translational and Molecular Imaging Institute, Icahn School of Medicine at Mount Sinai, New York)
19/05/2015, 12:00
3 - Advances in MR-PET and MR-SPECT software and quantification
Talk
Aim
To evaluate the effect of surface coils for carotid MR imaging on PET quantification in a clinical simultaneous whole-body PET/MR scanner.
Methods and materials
A cylindrical phantom was filled with a homogeneous 2L water-FDG mixture at a starting dose of 301.2MBq. Clinical PET/MR and PET/CT systems were used to acquire PET-data without a coil (reference standard) and with two carotid...
Dr
Pawel Markiewicz
(University College London, CMIC, Translational Imaging Group)
19/05/2015, 12:15
3 - Advances in MR-PET and MR-SPECT software and quantification
Talk
The purpose of this work is to provide a software solution which would enable very fast list-mode data processing offered by the massively parallel graphics processor units (GPU) while dealing efficiently with the common bottleneck of data transfers between hard disk storage, host (CPU) memory and device (GPU) memory. This software is dedicated to the PETLINK™ list-mode data format which is...
