During the ultrasound examination - also called sonography or echography - high-frequency ultrasound waves are used to display images. The ultrasonic waves sent into the body tissue are reflected differently by the tissue of different structures. The reflected sound waves are collected and measured; the computer finally generates an ultrasound image based on the time difference between the transmitted and received pulses.

Common uses

  • Diagnosis of abdominal and pelvic organs (liver, gallbladder, pancreas, spleen, kidney and urinary bladder)
  • Examination of soft tissues and joints
  • Examination of vessels (color-coded duplex sonography)
  • Examination of the mammary gland
  • Examination for lymph node diagnosis
  • Color-coded duplex sonography: Special ultrasound examination for vascular diagnosis. By analyzing the speed of blood flow, significant vascular constrictions (vascular stenoses) and widenings (aneurysms) can be shown.


Does the exam cause pain?

No, the examination is completely painless.

How is the examination performed?

During a sonography examination, the doctor touches you with a transducer, while at the same time the image of the examined body region appears on a monitor.

How long does the examination take?

Depending on the area of ​​the body examined, the examination usually takes between 5 and 20 minutes.

How should one prepare for an examination of the abdominal organs?
In the four hours before the examination, you should neither eat nor drink, as air in the stomach and intestines can significantly reduce the quality of the examination and images.
How should one prepare for a urinary bladder exam?

When examining the pelvic organs (urinary bladder), the urinary bladder should be filled so that it can be used as a so-called sound window.

What are the advantages of an ultrasound exam?
  • Radiation-free alternative to normal X-ray examinations.
  • It is not necessary to apply a contrast agent.
  • The examination is painless and gentle and can be carried out quickly.

Make an appointment for an examination

MRI and CT Institute | Surgery Dr. Christian Frisch
  • Gaalerstraße 2a, 8720 Knittelfeld, AUSTRIA

  • Tel.: +43 3512 843 43
  • Fax: +43 3512 843 75
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Opening hours institute & surgery
  • Monday & Wednesday:

    07.30 am - 04.30 pm

  • Tuesday & Thursday:

    07.30 am - 01.00 pm

  • Friday:

    07.30 am - 01.00 pm

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