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A SPECT demonstrator - revival of a gamma camera
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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2006 (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. 563, no 1, 274-277 p.Article in journal (Refereed) Published
Abstract [en]

A gamma camera has been updated and converted to serve as a demonstrator for educational purposes. The gantry and the camera head were the only part of the system that remained untouched. The main reason for this modernization was to increase the transparency of the gamma camera by partitioning the different logical building blocks of the system and thus providing access for inspection and improvements throughout the chain. New data acquisition and reconstruction software has been installed. By taking these measures, the camera is now used in education and also serves as a platform for tests of new hardware and software solutions. The camera is also used to demonstrate 3D (SPECT) imaging by collecting 2D projections from a rotatable cylindrical phantom. Since the camera head is not attached mechanically to the phantom, the effect of misalignment between the head and the rotation axis of the phantom can be studied. (c) 2006 Elsevier B.V. All rights reserved.

Place, publisher, year, edition, pages
2006. Vol. 563, no 1, 274-277 p.
Keyword [en]
medical imaging, gamma camera, SPECT
National Category
Medical Laboratory and Measurements Technologies
Identifiers
URN: urn:nbn:se:kth:diva-12067DOI: 10.1016/j.nima.2006.01.089ISI: 000238764700061Scopus ID: 2-s2.0-33745064793OAI: oai:DiVA.org:kth-12067DiVA: diva2:300887
Note
QC 20100721. Conference: 7th International Workshop on Radiation Imaging Detectors. Grenoble, FRANCE. JUL 04-07, 2005Available from: 2010-03-01 Created: 2010-03-01 Last updated: 2017-12-12Bibliographically approved
In thesis
1. Applications of tomographic imaging in nuclear medicine
Open this publication in new window or tab >>Applications of tomographic imaging in nuclear medicine
2006 (English)Licentiate thesis, comprehensive summary (Other scientific)
Place, publisher, year, edition, pages
Stockholm: KTH, 2006. 29 p.
Series
Trita-FYS, ISSN 0280-316X ; 2006:63
National Category
Physical Sciences
Identifiers
urn:nbn:se:kth:diva-4187 (URN)
Presentation
2006-11-24, Sal FA32, AlbaNova univ. centrum, Roslagstullsbacken 21, Stockholm, 14:00 (English)
Opponent
Supervisors
Note
QC 20101125Available from: 2006-11-27 Created: 2006-11-27 Last updated: 2010-11-25Bibliographically approved
2. 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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