Author: John Mulindi

John Mulindi has a background in Instrumentation, and he writes on various topics ranging from Technical, Business to Internet marketing fields. He likes reading, watching football, writing and taking on adventure walks in free time.

What is Magnetoencephalography (MEG)?

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

What is Functional MRI (fMRI)?

Functional MRI (fMRI) is the use of MRI to detect localized changes in brain activity, usually in the form of changes in cerebral metabolism, blood flow, volume, or oxygenation in response to task activation. In other words, Functional MRI provides … Read More

Features of an ECG Wireless Telemetry System

The advancement in technology has made it possible where necessary to monitor subjects from some distance using wireless telemetry. The biological parameter commonly studied this way is the electrocardiogram. The display of ECG and cardiac rates gives enough information … Read More

Types of Spirometers & Technologies used

Spirometer is the instrument used to measure lung capacity and volume. The record obtained from spirometer is called a spirogram. There are a number of spirometers used in respiration volume measurements. In this article, we look at general types of … Read More

Dispersive Spectrophotometry Chemical Analysis Technique

Dispersive spectrometry (DS) methods make up a large number of ultraviolet, visible light and infrared spectroscopy systems. DS refers to the fact that the light or electromagnetic radiation passed through the sample (analyte) must pass through a monochromator either before … Read More

Features of Microprocessor-Based ECG Systems

Microprocessors have been used in electrocardiographs to obtain certain advanced features like the elimination of artefacts, baseline shifting, and so forth using software techniques. In this article, we look at some of the key features of microprocessor-based ECG systems … Read More

The Principle & Applications of Confocal Imaging

Confocal imaging (CI) is based on illuminating a single point on the sample and collecting scattered light from the same point of the sample. The illumination point on the sample is the image of the illumination pinhole and is imaged … Read More

3 Common Causes of Anomalies in ECG Recordings

Irregular patterns of ECG may be caused by either pathological states or at times artefacts. Undesirable presence of artefacts on ECG trace may be due to the following:

  • Interference from the power line
  • Shifting baseline
  • Muscle tremor
3 Common Causes of Anomalies in ECG Recordings

Interference from the

… Read More

Polarizable vs. Non-Polarizable Electrodes

We may categorize electrodes into two possible types albeit theoretically: those that are perfectly polarizable and those that are perfectly non-polarizable. This categorization is based on what happens to an electrode when a current passes between it and the electrolyte. … Read More

What is Bioinstrumentation?

Bioinstrumentation involves the measurement of current or voltage signals from the different parts of the body. The measurement of various physiological signals produced by the body helps in diagnosis and treatment of diseases. In actual fact, when we talk about … Read More