Transcript Basic Diagnostics Method in Medicine

Ultrasonography- detection of size
and shape of foetus in uterus
X-Ray Imaging methods: Sciascopy,Sciagraphy,
Classical and Computer Tomography
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 + Anode ). Electrons are emitted from Cathode and flight
in vacuum targeting Anode. Thus, only 1-2% X- rays 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 versa. X-ray photo is black-white.The bones and air
have best contrast, soft tissues have worse or no
contrast.
X-Ray Tube (DIODE)
Sciascopy, Sciagraphy, Comp. Tomography
Classical Tomography
Computer Tomogr.
Computer Tomography (CT)