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Sökning: id:"swepub:oai:gup.ub.gu.se/67015" > Evaluation of recon...

  • Norberg, Pernilla,1970-Östergötlands Läns Landsting,Linköpings universitet,Medicinsk radiofysik,Radiofysikavdelningen,Hälsouniversitetet (författare)

Evaluation of reconstruction techniques for lung single photon emission tomography: a Monte Carlo study.

  • Artikel/kapitelEngelska2007

Förlag, utgivningsår, omfång ...

  • United States :Lippincott Williams & Wilkins,2007

Nummerbeteckningar

  • LIBRIS-ID:oai:gup.ub.gu.se/67015
  • https://gup.ub.gu.se/publication/67015URI
  • https://doi.org/10.1097/MNM.0b013e3282f1acacDOI
  • https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-21152URI

Kompletterande språkuppgifter

  • Språk:engelska

Ingår i deldatabas

Klassifikation

  • Ämneskategori:ref swepub-contenttype
  • Ämneskategori:art swepub-publicationtype

Anmärkningar

  • BACKGROUND: In studies of the distribution of lung function, the image quality of lung single photon emission computed tomography (SPECT) is important and one factor influencing it is the reconstruction algorithm. AIM: To systematically evaluate ordered subsets expectation maximization (OSEM) and compare it with filtered back-projection (FBP) for lung SPECT with Tc. METHODS: The evaluation of the number of iterations used in OSEM was based on the image quality parameter contrast. The comparison between OSEM and FBP was based on trade-off plots between statistical noise and spatial resolution for different filter parameters, collimators and count-levels. A Monte Carlo technique was used to simulate SPECT studies of a digital thorax phantom containing two sets of activity: one with a homogeneous activity distribution within the lungs and the other with superposed high- and low-activity objects. Statistical noise in the reconstructed images was calculated as the coefficient of variation (CV) and spatial resolution as full width at half-maximum (FWHM). RESULTS: For the configuration studied, the OSEM reconstruction in combination with post-filtering should be used in lung SPECT studies with at least 60 MLEM equivalent iterations. Compared to FBP the spatial resolution was improved by about 1 mm. For a constant level of CV, a four-fold increase in count level resulted in an increased resolution of about 2 mm. Spatial resolution and cut-off frequency depends on what value of noise in the image is acceptable also increased by using a low-energy, high-resolution collimator for CV values above 3%. The choice of noise-reducing filter and cut-off frequency depends on what value of noise in the image is acceptable.

Ämnesord och genrebeteckningar

Biuppslag (personer, institutioner, konferenser, titlar ...)

  • Bake, Björn,1939Gothenburg University,Göteborgs universitet,Institutionen för medicin, avdelningen för invärtesmedicin,Institute of Medicine, Department of Internal Medicine,Sahlgrenska universitetssjukhuset, Göteborg(Swepub:gu)xbakbj (författare)
  • Jacobsson, Lars,1947Göteborgs universitet, Göteborg(Swepub:gu)xjacla (författare)
  • Alm Carlsson, Gudrun,1939-Östergötlands Läns Landsting,Linköpings universitet,Medicinsk radiofysik,Hälsouniversitetet,Radiofysikavdelningen(Swepub:liu)gudal03 (författare)
  • Gustafsson, AgnethaÖstergötlands Läns Landsting,Linköpings universitet,Medicinsk radiofysik,Radiofysikavdelningen,Hälsouniversitetet(Swepub:liu)agngu51 (författare)
  • Linköpings universitetMedicinsk radiofysik (creator_code:org_t)

Sammanhörande titlar

  • Ingår i:Nuclear medicine communicationsUnited States : Lippincott Williams & Wilkins28:12, s. 929-360143-36361473-5628

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