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LSO based dual slice helical CT and PET demonstrators
KTH, School of Technology and Health (STH), Medical Engineering.ORCID iD: 0000-0001-5919-3554
KTH, School of Technology and Health (STH), Medical Engineering.
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2011 (English)In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, ISSN 0168-9002, E-ISSN 1872-9576, Vol. 633, S300-S302 p.Article in journal (Refereed) Published
Abstract [en]

Two demonstrators, a spiralCT and a miniPET, have been designed and constructed for educational purposes. Computed tomographs (CTs) and positron emission tomographs (PETs) are some of the most commonly used structural and functional imaging devices in medicine, respectively. There is a need for transparent demonstrators where the principles of the different modalities and their functions are presented. The aim of the developments of these systems was to present the major building blocks of CT and PET for undergraduate students. Photon detection in both systems is based on small pixelised scintillation crystals with position sensitive PMT readout. Similar analogue and digital data processing based on FPGA technique is applied for the demonstrators and common image reconstruction and presentation software components are used.

Place, publisher, year, edition, pages
2011. Vol. 633, S300-S302 p.
Keyword [en]
PET, CT, nuclear imaging, Education
National Category
Medical Laboratory and Measurements Technologies
Identifiers
URN: urn:nbn:se:kth:diva-12068DOI: 10.1016/j.nima.2010.06.195ISI: 000292782400089Scopus ID: 2-s2.0-79959859585OAI: oai:DiVA.org:kth-12068DiVA: diva2:300895
Note
QC 20100721. Updated from accepted to published. 11th International Workshop on Radiation Imaging Detectors.Available from: 2010-03-01 Created: 2010-03-01 Last updated: 2017-12-12Bibliographically approved
In thesis
1. Software Solutions for Nuclear Imaging Systems in Cardiology, Small Animal Research and Education
Open this publication in new window or tab >>Software Solutions for Nuclear Imaging Systems in Cardiology, Small Animal Research and Education
2010 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The sensitivity for observing physiological processes makes nuclear imaging an important tool in medical diagnostics. Different types of nuclear imaging modalities, with emphasis on the software components and image reconstructions, are presented in this thesis:  the Cardiotom for myocardial heart studies at the Karolinska University Hospital, the small animal Positron Emission Tomograph (PET) scanners for research and the SPECT, PET, spiral CT and Cardiotom demonstrators for the Royal Institute of Technology medical imaging laboratory.

A modular and unified software platform has been developed for data representation, acquisition, visualization, reconstruction and presentation of the programs of the imaging devices mentioned above. The high performance 3D ML-EM and OS-EM iterative image reconstruction methods are implemented both on Cardiotom and miniPET scanners.

As a result, the in-slice resolution of the first two prototypes of the Cardiotom today is the same as the formerly used filtered back-projection, however the in-depth resolution is considerably increased. Another improvement due to the new software is the shorter time that is required for data acquisition and image reconstruction. The new electronics with the newly developed software ensure images for medical diagnosis within 10 minutes from the start ofthe examination. The first system from the standardized production of the Cardiotom cameras is in the test phase.

The performance parameters (sensitivity, spatial and energy resolution, coincidence time resolution) of the full ring mini PET camera are comparable to other small animal PETsystems.

Place, publisher, year, edition, pages
Stockholm: KTH, 2010. 75 p.
Series
Trita-STH : report, ISSN 1653-3836 ; 2010:1
National Category
Biomedical Laboratory Science/Technology
Identifiers
urn:nbn:se:kth:diva-12069 (URN)
Public defence
2010-03-19, KTH-Flemingsberg, Sal 3-221, Alfred Nobels Allé 10, Stockholm, 09:15 (English)
Opponent
Supervisors
Note
QC20100721Available from: 2010-03-02 Created: 2010-03-01 Last updated: 2010-07-21Bibliographically approved

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Valastyán, Iván

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Medical Laboratory and Measurements Technologies

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