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Pregled bibliografske jedinice broj: 34099

Determination of small objects from pinhole scintigrams


Grošev, Darko; Medvedec, Mario; Lončarić, Srećko; Žuvić, Marijan; Dodig, Damir; Šmuc, Tomislav
Determination of small objects from pinhole scintigrams // Nuclear medicine communications, 19 (1998), 7; 679-688 (međunarodna recenzija, članak, znanstveni)


CROSBI ID: 34099 Za ispravke kontaktirajte CROSBI podršku putem web obrasca

Naslov
Determination of small objects from pinhole scintigrams

Autori
Grošev, Darko ; Medvedec, Mario ; Lončarić, Srećko ; Žuvić, Marijan ; Dodig, Damir ; Šmuc, Tomislav

Izvornik
Nuclear medicine communications (0143-3636) 19 (1998), 7; 679-688

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
pinhole scintigraphy; thyroid

Sažetak
This work investigates the possibilities of measuring the linear dimensions of small structures by pinhole scintigraphy. For this purpose a series of glass objects were made with spherical, cylindrical and conical shape. Their maximum chord lengths (diameters and heights) were from 3.5-22.5 mm. These glass objects were filled with 131-I activity, placed inside the plastic neck phantom and imaged by the gamma camera equipped with pinhole collimator. Source-to-collimator distance was varied from 2-12 cm. Algorithm for image segmentation (threshold selection) was used to divide image into object and background. In the segmented image, number of nonzero pixels in the direction of principal axes was multiplied with the appropriate calibration factor to obtain the linear dimensions of the object. Spatial resolution of the pinhole collimator, expressed as the full-width-half-maximum (FWHM), varied from 8-10 mm for the range of source-to-collimator distances examined. It was found that for dimensions up to 1.5xFWHM, finite spatial resolution affects the accuracy of measurements. Nonlinear correlation between true and calculated dimensions was used to take the latter into account. The results of this work are now being used to improve quantitation of remnant thyroid tissue mass in dosimetric calculation for radioiodine ablation.

Izvorni jezik
Engleski

Znanstvena područja
Javno zdravstvo i zdravstvena zaštita



POVEZANOST RADA


Projekt / tema
214008

Ustanove
Klinički bolnički centar Zagreb

Profili:

Avatar Url Damir Dodig (autor)

Avatar Url Darko Grošev (autor)

Avatar Url Mario Medvedec (autor)

Avatar Url Srećko Lončarić (autor)

Avatar Url Tomislav Šmuc (autor)

Citiraj ovu publikaciju

Grošev, Darko; Medvedec, Mario; Lončarić, Srećko; Žuvić, Marijan; Dodig, Damir; Šmuc, Tomislav
Determination of small objects from pinhole scintigrams // Nuclear medicine communications, 19 (1998), 7; 679-688 (međunarodna recenzija, članak, znanstveni)
Grošev, D., Medvedec, M., Lončarić, S., Žuvić, M., Dodig, D. & Šmuc, T. (1998) Determination of small objects from pinhole scintigrams. Nuclear medicine communications, 19 (7), 679-688.
@article{article, year = {1998}, pages = {679-688}, keywords = {pinhole scintigraphy, thyroid}, journal = {Nuclear medicine communications}, volume = {19}, number = {7}, issn = {0143-3636}, title = {Determination of small objects from pinhole scintigrams}, keyword = {pinhole scintigraphy, thyroid} }

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus
  • MEDLINE


Uključenost u ostale bibliografske baze podataka:


  • EMBASE (Excerpta Medica)
  • MEDLINE