Magnetoencephalography (MEG) is a form of neuroimaging that maps the tangential components of magnetic fields associated with scalp potentials produced by the brain. These potentials are similar to those that can be recorded as electroencephalograms (EEGs) however the dynamic magnetic … Read More
Tag: medical diagnostics
What is Functional MRI (fMRI)?
What is Echocardiography?
Echocardiography is a diagnostic technique that employs ultrasound to produce an image of the beating heart in real time. A piezoelectric transducer element is used to emit short bursts of high frequency, low intensity sound through the chest wall to … Read More
The Function of a PET scan in Biomedical Diagnostics
The Process of Setting up a PET scan
The ability of a PET scanner to target specific functions or objects e.g. tumour makes it a very effective tool in non-invasive medical imaging and diagnostics. The process involves using radionuclides, so PET scanners aren’t available at every medical facility.… Read More
Radionuclide Imaging Techniques
The radionuclide imaging devices place radionuclides, called tracers, within the body. We have 3 types of imaging that include the following:
- Single Photon Emission Computed Tomography (SPECT)
- Radioimmunoassay (RIA)
- Positron Emission Tomography (PET)
Let’s discuss briefly each of the above … Read More
Clinical Applications of NTC Thermistors
Thermistors are certainly the most used transducers for medical temperature measurements. Their properties facilitate clinically difficult measurements that include: hypothermia, transcutaneous measurements during cardiopulmonary bypass, testicular temperature measurements in reproductive medicine, continuous monitoring of preterm infants and personal heat strain … Read More
The Application of Echocardiography in Cardiovascular Diagnosis
The key application of ultrasound in cardiovascular diagnosis is echocardiogram. It utilizes M-scan technique in the imaging. In the echocardiogram, the movements of the valves and other structures of the heart are displayed as a function of time. The … Read More
How Ophthalmoscope is used for Eye Examination
Ophthalmoscope is an instrument used to examine the interior of the eye including the lens, retina, and optic nerve. It is used primarily to:
- Assess the conduction of fundus of eye
- Detect the opacity of the ocular media
Ophthalmoscope is … 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