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Title:Current trends in diagnostic nuclear medicine instrumentation
Authors:ID Fidler, Valentin (Author)
Files:.pdf PDF - Presentation file, download (330,04 KB)
MD5: 76D1DA8B6150838B2C6D86E85C7414EA
 
Language:English
Typology:1.02 - Review Article
Organization:Logo OI - Institute of Oncology
Abstract:Introduction. The basic principles of nuclear medicine imaging instruments aredescribed with the emphasis on multi crystal scintillation and semiconductor gamma cameras, positron emission scanners without detector inter-ring attenuation septa, new detector materials and semiconductor CZT surgical probes for localization of metastases. For the estimation of minimal useful detector diameter the theoretical equation was derived for the 20% lossof absorbed gamma rays at the edge of the detector. Conclusion. Nuclear medicine instrumentation has been passing throgh vigorous development in the last years and will be most likely also in the near future. New detection materials with much better physical characteristics than the standard NaI as regards the stopping power, energy resolutions, fragility, decay time, light output, and density will most likely replace the NaI. It is expected that new imaging devices with several thousands of tiny crystals or semiconductor arrayof small position sensitive areas will improve the sensitivity and specificity of clinical studies. At the same time the small surgical probes made from these materials are also becoming very popular in surgery tracing the regional metastases.
Publication status:Published
Publication version:Version of Record
Publication date:01.01.2000
Publisher:Slovenian Medical Association - Slovenian Association of Radiology, Nuclear Medicine Society, Slovenian Society far Radiotherapy and Oncology, and Slovenian Cancer Society
Year of publishing:2000
Number of pages:str. 381-385
Numbering:Letn. 34, št. 4
Source:Ljubljana
PID:20.500.12556/DiRROS-17985 New window
UDC:615.4
ISSN on article:1318-2099
COBISS.SI-ID:12587481 New window
Copyright:by Authors
Note:BSDOCID56907;
Publication date in DiRROS:25.01.2024
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Downloads:94
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Record is a part of a journal

Title:Radiology and oncology
Shortened title:Radiol. oncol.
Publisher:Slovenian Medical Society - Section of Radiology, Croatian Medical Association - Croatian Society of Radiology
ISSN:1318-2099
COBISS.SI-ID:32649472 New window

Secondary language

Language:Slovenian
Title:Razvojni trendi v nuklearnomedicinski instrumentaciji
Abstract:Izhodišča. Prikazane so fizikalne osnove nuklernomedicinskih slikovnih tehnik s poudarkom na razvoju novih tankih mnogokristalnih scintilacijskih in polprevodniških gama kamer, PET skenerjev brez vmesnih sten med obroči detektorskih kristalov, novih detektorskih materialov ter nove polprevodniške CZT kirurške detektorske sonde za ugotavljanje lokalnih metastaz. Za oceno minimalnega premera scintilacijskih kristalov je narejen izračun, ki upošteva 20% izgubo absorbiranih gama žarkov ob robu kristala. Zaključki. V zadnjih letih se instrumentacija v nuklearni medicini hitro razvija predvsem, po zaslugi novih detekcijskih snovi, ki imajo v primerjavi z NaI kristalom boljšoatenuacijo, energijsko ločljivost, manjšo krhljivost, krajši razpadni čas za scintilacijsko svetlobo, večji svetlobni izkoristek in gostoto. Zelo verjetno bodo gama kamere z mnogokristalnimi detektorji ter pozicijsko občutljivimi polprevodniškimi detektorji znatno izboljšale občutljivost detekcije kot tudi energijsko in prostorsko ločljivost, s čimer se bo povečalatudi specifičnost pri kliničnih scintigrafskih preiskavah. Pomemben jetudi razvoj kirurških detekcijskih sond, ki so izboljšale zaznavnost majhnihlokaliziranih metastaz.


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