51
6. Technical information
6-1. Principles
Model Smartdop 45 is designed to obtain various blood flow velocity through the
ultrasound which is transmitted from probe to patient body and is reflected by the blood
(hemocyte, etc.).
The unit amplifies the high frequency oscillation output and then supplies it to the
transmitter transducer. It is converted to ultrasound by the transducer and the ultrasound
is transmitted to external objects. The ultrasound moves straight through biophysical
object, and is reflected by the moving object (blood flow, fetal heartbeat etc.).
The reflected ultrasound is received by the receiving transducer and is converted into
electric signals again.
The converted signals are amplified and then detected. After removing unnecessary noise
from the signals and improving S/N ratio at the filter circuit, the Doppler shift signals are
amplified and are converted to audible sounds through a speaker or a headset.
Simultaneously, the Doppler shift signals are applied to the CPU and converted to blood
flow velocity waveform signals which can be displayed and printed.
To Next Page
Loading...
