Standardisation in Ultrasonography: Principle and Diagnostic Significance
| Autor: | Ivo Hrazdira, Zuzana Hlinomazová |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2004 |
| Předmět: |
medicine.medical_specialty
A- scan business.industry lcsh:R Echogenicity lcsh:Medicine Standardised echography General Medicine Reflectivity 03 medical and health sciences 0302 clinical medicine Histogram 030221 ophthalmology & optometry medicine Humans B- scan Radiology Ultrasonography business 030217 neurology & neurosurgery Biomedical engineering |
| Zdroj: | Acta Medica, Vol 47, Iss 4, Pp 305-308 (2004) |
| ISSN: | 1805-9694 1211-4286 |
| Popis: | Disadvantage of ultrasonography is its dependence on subjective assessment of displayed images. The way how to minimize both intraobserver and interobserver differences is creation of standard conditions for examination including a quantitative approach to evaluation of tissue reflectivity. The oldest mode of standardisation is standardised A- scan, used in ophthalmology. It enables differentiation of echoes, reflected from different ocular structures and is helpful in assessment of extraocular muscle thickness. Standardisation of B- scan depends on the type of diagnostic device and is based on quantification of image echogenicity. In our study reference values of grey-level histogram were established for some thyroid diseases using standard setting of imaging parameters. Results indicate that both standardised A- and B- scan should be helpful in differential diagnostics. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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