Ultrasonography- Ultrasonography- detection of size and shape of foetus in uterus.
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Transcript of Ultrasonography- Ultrasonography- detection of size and shape of foetus in uterus.
Ultrasonography-Ultrasonography- detection of size and shape of foetus in uterus
X-Ray Imaging methodsX-Ray Imaging methods:: Sciascopy,Sciagraphy, Sciascopy,Sciagraphy, Classical and Computer Tomography Classical and Computer Tomography
X-rays: X-rays: kind of ionizing, non-visible radiation.It is danger for living body. Max. harmless exposure is 5 mSv/ year
Definition: is elmg. waving of photoelectrons (as a visible ligh), but with very short λ = 0.05 ηm
Source: X-ray tube (diode with - Cathode and + Ano-de ). Electrons are emitted from Cathode and flight in vacuum targeting Anode. Thus, only 1-2% X- ra-ys is produced, 98% is taken away of diode as a heat.
The higher is anodal current (50-150 kV) the hardest (more penetrable) is X-ray radiation and vice ver-sa. X-ray photo is black-white.The bones and air have best contrast, soft tissues have worse or no contrast.
X-Ray Tube (DIODEX-Ray Tube (DIODE))
Sciascopy, Sciagraphy, Comp. TomographyTomography
Classical Tomography Computer Tomogr.Classical Tomography Computer Tomogr.
Computer Tomography (CTComputer Tomography (CT))