Diagnostic Imaging and Coupling Gel

Diagnostic Imaging and Coupling Gel

Diagnostic Imaging and Coupling Gel

The need for skilled healthcare workers is increasing in proportion to the needs of our rapidly aging population. The field of diagnostic medical imaging is one area in which the demand currently is high and is expected to remain so for quite some time. It could be quite worthwhile for those thinking of entering the field of allied healthcare to consider a career in medical diagnostic imaging.

Diagnostic imaging is a catch all description that encompasses a number of allied healthcare specialties related to the imaging sciences. The three primary fields we will discuss are radiologic technology, ultrasound technology, and nuclear medicine technology. Diagnostic imaging refers to technologies that doctors use to look inside your body for clues about a medical condition. A variety of machines and techniques can create pictures of the structures and activities inside your body.

Many imaging tests are painless and easy. Some require you to stay still for a long time inside a machine, though. This can be uncomfortable. Certain tests involve radiation, but these are generally considered safe because the dosage is very low. For some imaging tests, a tiny camera attached to a long, thin tube is inserted in your body. This tool is called a scope. The doctor moves it through a body passageway or opening to see inside a particular organ, such as your heart, lungs or colon. These procedures often require anesthesia.

The probe is tracked by the localizer and is seen in a virtual display using the CAS system. Similar to vascular Doppler, the probe is brought in contact with the skin by using a coupling gel.3Short pulses of ultrasound are transmitted into the tissue. Differences in acoustic impedance give rise to reflections in the tissue. At the soft tissuebone interface, the complete power of the incident beam is reflected because of the high impedance difference. The echoes are received at the transducer and amplified by the receiver. If amplification of the signal is time-gain compensated, then the effect of the depth-dependent attenuation on the echo amplitude can be lowered. The probe works as a range sensor, measuring the distance from the surface of the skin to the underlying bone. The spatial position of the probe and of the ultrasound beam axis is determined by the navigation system. Distance along the x-, y-, and z-axes from the probe tip to the bone surface were added to the location of the probe to register the location of the underlying bony anatomy.

The procedure for the intra operative A-mode ultrasound SM was established in a laboratory setup. One objective was to outline a course of action for clinical trials on patients. Note that the transducer could not be steam sterilized because of different temperature expansion coefficients of the transducer materials and heat-sensitive sealing at the piezoelectric crystal. The coupling gel applied to the patient's skin also could not be sterilized. Visit: www.eco-med.com

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