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Related Concept Videos

Sampling Continuous Time Signal01:11

Sampling Continuous Time Signal

In signal processing, a continuous-time signal can be sampled using an impulse-train sampling technique, followed by the zero-order hold method. Impulse-train sampling involves the use of a periodic impulse train, which consists of a series of delta functions spaced at regular intervals determined by the sampling period. When a continuous-time signal is multiplied by this impulse train, it generates impulses with amplitudes corresponding to the signal's values at the sampling points.
In the...
Upsampling01:22

Upsampling

Managing signal sampling rates is essential in digital signal processing to maintain signal integrity. A decimated signal, characterized by a reduced frequency range due to its lower sampling rate, can be upsampled by inserting zeros between each sample. This upsampling process expands the original spectrum and introduces repeated spectral replicas at intervals dictated by the new Nyquist frequency. To refine this zero-inserted sequence, it is passed through a lowpass filter with a cutoff...
Sampling Methods: Sample Types01:18

Sampling Methods: Sample Types

Sampling materials are classified into three main types: solid, liquid, and gas.
Solid samples include a variety of substances, such as sediments from water bodies, soil, metals, and biological tissues. Two standard methods for extracting sediments from water bodies are grab sampling and piston coring. Grab sampling involves using a device to collect a discrete sediment sample from the bottom of a water body with minimal disturbance. Grab samples do not always represent the entire area due to...
Sampling Methods: Overview01:06

Sampling Methods: Overview

A sample refers to a smaller subset representative of a larger population. In analytical chemistry, studying or analyzing an entire population is often impractical or impossible. Therefore, samples are used to draw inferences and generalize the whole population. The sampling method selects individuals or items from a population to create a sample. Standard sampling methods include random, judgemental, systematic, stratified, and cluster sampling. 
In analytical chemistry, the choice of sampling...
Reconstruction of Signal using Interpolation01:10

Reconstruction of Signal using Interpolation

Signal processing techniques are essential for accurately converting continuous signals to digital formats and vice versa. When a continuous signal is sampled with a period T, the resulting sampled signal exhibits replicas of the original spectrum in the frequency domain, spaced at intervals equal to the sampling frequency. To handle this sampled signal, a zero-order hold method can be applied, which creates a piecewise constant signal by retaining each sample's value until the next sampling...
Phase Contrast and Differential Interference Contrast Microscopy01:26

Phase Contrast and Differential Interference Contrast Microscopy

Phase-Contrast Microscopes
In-phase-contrast microscopes, interference between light directly passing through a cell and light refracted by cellular components is used to create high-contrast, high-resolution images without staining. It is the oldest and simplest type of microscope that creates an image by altering the wavelengths of light rays passing through the specimen. Altered wavelength paths are created using an annular stop in the condenser. The annular stop produces a hollow cone of...

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Studying Cavitation Enhanced Therapy
07:36

Studying Cavitation Enhanced Therapy

Published on: April 9, 2021

Comparing types of digital capture.

Laura J Armbrust1

  • 1Department of Clinical Sciences, Kansas State University, College of Veterinary Medicine, Veterinary Medical Teaching Hospital, 1800 Denison Avenue, Manhattan, KS 66506, USA. armbrust@vet.ksu.edu

The Veterinary Clinics of North America. Small Animal Practice
|June 18, 2009
PubMed
Summary
This summary is machine-generated.

Choosing a digital radiography system requires understanding the differences between cassette-based and cassette-less technologies. Evaluating the advantages and disadvantages of each is crucial before making a purchase decision.

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Area of Science:

  • Medical Imaging Technology
  • Radiography Systems

Background:

  • Digital radiography (DR) systems are widely available for medical imaging.
  • These systems broadly fall into two categories: cassette-based and cassette-less.

Purpose of the Study:

  • To inform potential buyers about the key features of different digital radiography systems.
  • To provide a comparative overview of cassette-based and cassette-less DR technologies.

Main Methods:

  • Review of available digital radiography system types.
  • Analysis of the advantages and disadvantages of each system category.

Main Results:

  • Cassette-based systems offer flexibility and potentially lower initial cost.
  • Cassette-less systems provide faster workflow and potentially higher image quality.

Conclusions:

  • Informed purchasing decisions require a thorough understanding of DR system pros and cons.
  • The choice between cassette-based and cassette-less DR depends on specific clinical needs and budget.