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7th Conference on PET/MR and SPECT/MR

21–23 May 2018
La Biodola, Isola d'Elba
Europe/Rome timezone

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Session

Session 2 - Software and Quantification: attenuation correction – part 1

21 May 2018, 11:00
La Biodola, Isola d'Elba

La Biodola, Isola d'Elba

<a target="_blank" href=http://www.elba4star.it/HH/index-Eng.html>Hotel Hermitage</a> </br>e-mail: <a href="mailto:psmr2018@df.unipi.it">psmr2018@df.unipi.it</a>

Conveners

Session 2 - Software and Quantification: attenuation correction – part 1

  • Dimitris Visvikis (INSERM, France)

Presentation materials

There are no materials yet.

  1. 24. Attenuation estimation using non-TOF PET scattered photon energy information and an anatomical MRI prior
    Ludovica Brusaferri (Institute of Nuclear Medicine, UCL, London, UK)
    21/05/2018, 11:00
    Talk
    Emission-based attenuation correction methods aim to derive the attenuation information directly from the emission data. Although promising results have been obtained with this approach, joint-reconstruction of activity and attenuation suffers from several limitations. Nearly all studies report cross-talk between the estimated activity and attenuation distributions if time-of-flight...
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  2. 22. Repeatability of Deep Learning density maps of the head
    Gaspar Delso (UniversitätsSpital Zürich)
    21/05/2018, 11:20
    Talk
    The goal of the present study was to assess the longitudinal repeatability of a novel bone identification method, based on a convolutional deep network trained to convert LAVA-Flex and zero echo-time MRI data into pseudo-CT density maps. The consistency of the bone maps -with potential applications in attenuation correction of PET data and MR-based radiotherapy planning- was evaluated for a...
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  3. 1. Simultaneous emission/transmission measurements for accurate attenuation correction in PET/MRI
    Andreas Renner (Center for Medical Physics and Biomedical Engineering)
    21/05/2018, 11:40
    Talk
    Attenuation correction (AC) is still a challenge in PET/MRI. Without photon transmission sources, methods for AC rely on the segmentation of MR images or the use of dedicated MR sequences. In general, these methods neglect the attenuation of cortical bone, thus, leading to a bias in quantification of tracer concentration in PET images. We have developed a head coil system with an integrated...
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  4. 37. An Aristotelian view on MR-based attenuation correction (ARISTOMRAC): combining the four elements
    Matteo Cencini (Università di Pisa)
    21/05/2018, 12:00
    1 - Instrumentation: detectors and electronics
    Talk
    The ancient Greeks believed that matter was made of a weighted combination of four elements: earth, water, air and fire. Using a similar simplified assumption, we formulated a multi-component MR fingerprinting framework, where every voxel was considered a weighted combination of four base tissues: bone, water, air and fat. We named our approach Aristotelian MR based attenuation correction...
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  5. 68. A lesion insertion tool for attenuation correction evaluation in simultaneous PET/MR
    Richard Laforest (Washington University)
    21/05/2018, 12:20
    Talk
    Attenuation Correction in simultaneous PET/MR was originally implement using a two-point DIXON which neglected the bones. More recent implementations of MR based attenuation strategy in PET/MR involve either a fast UTE or a bone atlas which allows for inclusion of bones. However, soft-tissues are still segmented to provide anatomical attenuation into five compartment identified as air, lungs,...
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