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Related Concept Videos

Instrument Transformers01:23

Instrument Transformers

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Instrument transformers, comprising voltage transformers (VTs) and current transformers (CTs), play crucial roles in power substations by providing isolated replicas of current or voltage for measurement and protection purposes. Voltage transformers reduce the primary voltage to levels suitable for relay operation and measurement, while current transformers scale down the primary current. The primary winding of a current transformer often consists of a single turn, achieved by threading the...
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Instrument Calibration01:12

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Instrument calibration is essential for ensuring that instruments produce accurate and consistent results. It is vital in manufacturing, healthcare, testing laboratories, and scientific research. Calibration processes are specific to each instrument and help enhance data accuracy. Each instrument has a unique calibration process tailored to its design and function to improve data accuracy.
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An electrocardiography (ECG) machine is an essential piece of medical equipment used to monitor the electrical activity of the heart. It operates by detecting small electrical changes on the skin that result from the depolarization of the heart muscle during each heartbeat. However, these signals are in the microvolt range and can be easily overwhelmed by noise or interference.
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Uncertainty in Measurement: Reading Instruments02:46

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Counting is the type of measurement that is free from uncertainty, provided the number of objects being counted does not change during the process. Such measurements result in exact numbers. By counting the eggs in a carton, for instance, one can determine exactly how many eggs are there in the carton. Similarly, the numbers of defined quantities are also exact. For example, 1 foot is exactly 12 inches, 1 inch is exactly 2.54 centimeters, and 1 gram is exactly 0.001 kilograms. Quantities...
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Capillary Electrophoresis: Instrumentation01:20

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Capillary electrophoresis instrumentation typically consists of several key components. A high-voltage power supply generates the electric field necessary for the separation by connecting to an anode (the positively charged electrode) and a cathode (the negatively charged electrode) located in buffer reservoirs at each end of the capillary tube. The system includes a sample vial, a fused silica capillary tube coated with polyimide for mechanical strength through which the sample components...
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Fluorometers and spectrofluorometers are two types of instruments used for measuring molecular fluorescence. These instruments differ in how they select excitation and emission wavelengths and the type of light sources they utilize. Fluorometers use absorption interference filters to choose excitation and emission wavelengths. The excitation source in a fluorometer is typically a low-pressure mercury vapor lamp that emits intense lines distributed throughout the ultraviolet and visible regions.
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Multiple instruments motion trajectory tracking in optical surgical navigation.

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    This study presents a novel optical surgical navigation system for accurately identifying and tracking multiple surgical instruments simultaneously. The developed algorithm demonstrates high stability and meets clinical accuracy requirements for enhanced surgical procedures.

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    Area of Science:

    • Medical technology
    • Computer vision
    • Surgical robotics

    Background:

    • Optical surgical navigation systems offer high accuracy, making them a critical research area.
    • Clinical applications increasingly require the identification and tracking of multiple surgical instruments simultaneously.

    Purpose of the Study:

    • To develop and validate an algorithm for identifying and tracking multiple surgical instruments in real-time.
    • To ensure the system meets the stringent accuracy and stability demands of clinical surgical navigation.

    Main Methods:

    • Utilized marker-based geometrical arrangement for instrument identification and motion vectors for tracking.
    • Employed a stereoscopic camera with 850 nm filters for image capture.
    • Conducted experiments on identification, tracking, stability, spatial distance, and rotation of multiple instruments.

    Main Results:

    • Successfully identified and tracked up to ten surgical instruments simultaneously with high accuracy.
    • Demonstrated sub-millimeter standard deviations in stability tests for both typical and miniature surgical instruments.
    • Validated the system's capability to measure spatial distance and rotation between instruments.

    Conclusions:

    • The proposed optical surgical navigation algorithm accurately identifies and tracks multiple instruments.
    • The system exhibits high stability and meets clinical accuracy requirements for surgical applications.