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US pamati I. Naļivaiko
- 1. 1 Ultrasonogrāfija. Vēsture. Darbības princips. Rīgas Stradiņa universitātes Medicīnas fakultātes VI kursa studente Inga Naļivaiko 21.09.2016.
- 2. 2 Saturs Neliels ieskats vēsturē… Ultraskaņas veidošanās » Zondes » Zonde šķērsgriezumā » Darbības princips Attēls » Ehogenitāte » Forma Artefakti Doppler ultrasonogrāfija Elastogrāfija
- 3. 3
- 4. 4 Ultraskaņa – augstas frekvences skaņas viļņi http://www.medicinenet.com/script/main/art.asp?articlekey=11850
- 11. 11 Orgāna lokalizācija Izmērs Forma Ārējā kontūra Struktūra (homogēna/heterogēna) Ehogenitāte
- 13. 13 FORMA
- 14. 14 ARTEFAKTI
- 16. 16 Dorsālais pastiprinājums https://www.studyblue.com/notes/note/n/liver-pathology/deck/15144418
- 20. 20 Doppler ultrasonogrāfija http://formulas.tutorvista.com/physics/doppler-shift-formula.html Doplera efekts – izmaiņas viļņu frekvencē objektam pārvietojoties
- 22. 22 Dupplex ultrasonogrāfija Ultraskaņas «B» režīms + spektra analīze http://www.ktdiagnostic.com/carotid-artery-duplex-scan/
- 23. 23 Ultraskaņas elastogrāfija Neinvazīva attēlveidošanas metode, ko pielieto, lai noteiktu relatīvo audu saspiežamību vai deformāciju, pielietojot noteiktu spēku Divas galvenās elastogrāfijas formas: »Kvazistatiskā jeb deformācijas elastogrāfija (SE - strain elastography) »Bīdes viļņa elastogrāfija (SWE – shear wave elastography). http://www.ultrasonografija.lv/index.php?id=83
- 24. 24 Deformācijas elastogrāfijā tiek mērīta audu nobīde, kas rodas sākotnējā kompresijas spēka rezultātā. Mīkstos audos nobīde ir lielāka, salīdzinot ar cietiem (blīviem) audiem http://www.ultrasonografija.lv/index.php?id=83
- 25. 25 Bīdes viļņa elastogrāfijā tiek mērīts šķērsvirzienā orientēto bīdes viļņu ātrums. Cietos (blīvos) audos bīdes viļņi izplatās ātrāk, nekā mīkstos audos http://www.ultrasonografija.lv/index.php?id=83
- 28. 28 Jautājumi? :)
- 29. 29 Kāda ir savstarpējā ehogenitāte? https://www.researchgate.net/figure/221915614_fig2_Fig-4-Normal-ultrasound-liver- pattern-Echogenicity-and-echodensity-of-the-liver-and
- 30. 30 Kas ir redzams attēlā? Kā to raksturot? http://www.slredultrasound.com/ImageBank/Renal.html
- 31. 31 Kas šī par zondi? Kur pielieto? http://www.kpiultrasound.com/categories/ultrasound-probes/page/10/
- 32. 32 Kas redzams šajā attēlā? http://ultrasoundcases.info/Slide-View.aspx?cat=137&case=7418
- 36. 36 Kā sauc šādu izmeklējumu? https://gi.jhsps.org/GDL_Disease.aspx?CurrentUDV=31&GDL_Cat_ID= 551CDCA7-A3C1-49E5-B6A0-C19DE1F94871&GDL_Disease_ID=E81
- 39. 39 Izmantotie resursi History of Ultrasound in Perioperative Medicine, Conor Hearty and Dominic Harmon, Perioperative Diagnostic and Interventional Ultrasound, Chapter 1, page 3-5 Ultrasound, Thieme Clinical Companions, G. Schmidt, Chapter 1, Basic Physical and Technical Principles http://ultrasoundcases.info http://radiopaedia.org http://www.ultrasonografija.lv/index.php?id=83 http://www.efsumb-atlas.org/v2/index.asp Ultrasonogrāfijas pamati, RSU Radioloģijas katedras prezentācija
Editor's Notes
- Kur tad īsti izmantojam ultraskaņu – kādās jomās?
- Echogenicity (misspelled sometimes as echogenecity) is the ability to bounce an echo, e.g. return the signal in ultrasound examinations. In other words, echogenicity is higher when the surface bouncing the sound echo reflects increased sound waves. Tissues that have higher echogenicity are called "hyperechogenic" and are usually represented with lighter colors on images in medical ultrasonography. In contrast, tissues with lower echogenicity are called "hypoechogenic" and are usually represented with darker colors. Areas that lack echogenicity are called "anechogenic" and are usually displayed as completely dark.
- Attenuation, ēnas
- ULTRASOUND DISCLOSED THAT WAS A CYSTIC TUMOR AT THE RIGHT LOBE THYROID WITH MANY COMET TAIL ARTIFACTS INSIDE THE CYST. This 85 year-old woman presented with abdominal pain. In her liver were multiple small echogenic foci with comet-tail artefact. Comet-tail artefact arises from reverberation of the ultrasound beam within a small cyst or gas bubble. The multiple echoes generated register as a trail on the image.Comet-tail artefact arising within the liver may be due to gas (portal venous gas or biliary tree gas). The appearance may also be seen with von Meyenberg complexes (biliary hamartomas), a benign condition found in up to 5% of the population.
- It is named after the Austrian physicist Christian Doppler, who proposed it in 1842 in Prague.
- Strain elastography This invasive ductal carcinoma shows blue (for hard) colouration that extends beyond the B-mode lesion. 67-year-old patient with liver cirrhosis and ascites. Real-time elastography (Hitachi Hi Vision Preirus) with convex probe shows the difference in hardness between intercostal muscles (blue), the ascites fluid (red) and the hard liver parenchyma( blue) with the mean histogram 8.5 [Figure 1].
- 2D=SWE 60 years old male patient with multiple thyroid nodules (the largest with a volume of 8.3 ml, size: 29 x 18 x 29 mm) in the right lobe, scintigraphically “cold”. Laboratory tests were within normal ranges. B mode ultrasound revealed an isoechoic inhomogenous nodule. 2D SWE (Aixplorer, Supersonic) demonstrated similar stiffness compared to the normal thyroid parenchyma [Figure 1 and 2]. Surgery was performed. Histology revealed follicular adenoma.
- Ehogenitāte?
- Cista – ehogenitāte, forma, kur atrodas?
- TEUS