Contrast agents emphasize or magnify the physiological features or functions that would otherwise, be invisible, weak or obscured in images. Contrast agents are commonly applied in vasculature and also employed in applications where the uptake of an agent by an … Read More
Tag: Ultrasound scan
Ultrasound vs. X-rays, what are the differences?
Both ultrasound and X-rays are used in medical diagnosis. We look at the differences in their physical properties and the applications differences between the two as applied in medical diagnosis.
Table 1: Physical Property differences between Ultrasound and X-rays
| Property |
How Ophthalmic Scanning of the Eye is done
The ultrasound is widely used for the diagnostics scanning of the eye. A-scan and B-scan modes of display are used in ophthalmic scanning. The transducer is placed directly over the eye of the patient while performing ophthalmic scanning. The high … Read More
Ultrasound Scanning Techniques
Introduction
Imaging systems employ pulsed ultrasound or the pulsed Doppler mode. The instrumentation system consists of:
- An electrical signal source to vibrate the crystal
- Piezoelectric crystal (transmits ultrasound)
- A second crystal or the same crystal to receive echoes
- Amplifier
- Display
How Ultrasound Measurements are used in Medical Diagnosis
Introduction
The application of ultrasonic in medical field is based on sonar principle as used by bats, anglers with fish detectors, and ships at sea. This is a totally non-invasive procedure. Acoustic waves are easily transmitted in water and are … Read More
Introduction to Medical Diagnostic Techniques
Diagnostic techniques are investigations and tests performed on patients with the intention to identify the cause of illness. The ultrasound is sonic energy at frequencies above the audible range. The most widely used applications of ultrasound in diagnostic medicine involve … Read More