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Related Concept Videos

Quality Control01:05

Quality Control

1.4K
Quality control is one of the three cyclical quality assurance activities that help keep a system under statistical control. Typical quality control activities include creating quality control charts, conducting proficiency testing, and documenting and archiving results.
Quality control helps track data, visualize trends, and identify variations, making it easier to detect deviations that may affect the accuracy of an analysis. One way to do this is by generating a quality control chart, which...
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Testing Water Quality01:14

Testing Water Quality

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When the quality of water for concrete preparation is uncertain, its impact on the setting time of cement and compressive strength of mortar is assessed by comparison with de-ionized or distilled water benchmarks. American Society for Testing and Materials (ASTM) C1602 requires the setting times to be within 90 minutes of the control, British Standard (BS) 3146:1980 allows a 30-minute variance in the initial setting, while British Standards European Norm (BS EN) 1008 specifies initial setting...
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Quality of Water01:19

Quality of Water

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In concrete preparation, the quality of water is paramount as it affects the strength and durability of the concrete. Potable water is usually preferred; however, it must not have excessive sodium or potassium to prevent compromising the concrete's integrity. Water quality is typically evaluated based on impurities such as dissolved solids, chlorides, and sulfates, and its pH value is ideally between 6 and 8. Even slightly acidic natural water may be acceptable unless it contains harmful...
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Quality Assurance01:19

Quality Assurance

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Quality assurance is the overarching term used to describe the activities employed to ensure the proper performance of a system. These activities can be classified into three categories: quality control, quality assessment, and internal corrective measures. Typically, these activities work cyclically: quality control is performed before and during the analysis, while quality assessment occurs during and after the investigation. Internal corrective measures are implemented based on the findings...
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Pulse amplitude and quality01:17

Pulse amplitude and quality

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Pulse amplitude is a crucial indicator of cardiac health because it provides valuable insights into the strength of left ventricular contractions and the overall uniformity of blood circulation within the vasculature. The strength of the pulse is directly related to the force with which the heart contracts and the volume of blood being pumped.
A weak or absent pulse may indicate reduced cardiac output or poor left ventricular contraction, which can be signs of cardiovascular dysfunction or...
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Control System Problem01:21

Control System Problem

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In an open-loop system, such as a basic thermostat, the poles of the transfer function influence the system's response but do not determine its stability. However, when feedback is introduced to form a closed-loop system, such as an advanced thermostat that adjusts heating based on room temperature, stability is governed by the new poles of the closed-loop transfer function.
When forming a closed-loop system, issues can arise if the poles cross into the unstable region, leading to potential...
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Related Experiment Video

Updated: Jan 26, 2026

A 3D-printed Chamber for Organic Optoelectronic Device Degradation Testing
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3D printed testing aids for radiographic quality control.

Kent M Ogden1, Kristin E Morabito1, Paul K Depew1

  • 1Department of Radiology, SUNY Upstate Medical University, Syracuse, NY, USA.

Journal of Applied Clinical Medical Physics
|April 8, 2019
PubMed
Summary
This summary is machine-generated.

3D printed tools enhance radiographic quality control testing by improving precision and repeatability. These cost-effective, open-source aids offer accurate results for radiographic and fluoroscopic imaging systems.

Keywords:
3D printingadditive manufacturingfluoroscopyphantomsquality controlradiography

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Area of Science:

  • Medical Physics
  • Radiological Sciences
  • Materials Science

Background:

  • Quality control testing of radiographic and fluoroscopic imaging systems demands precise and repeatable positioning of test objects.
  • Existing methods can be inefficient and lack accuracy.

Purpose of the Study:

  • To introduce novel 3D printed testing aids for radiographic and fluoroscopic quality control.
  • To present a new device for determining the perpendicular ray location in radiographic systems.
  • To evaluate the radiographic characteristics of 3D printed polylactic acid (PLA) materials.

Main Methods:

  • Designed and 3D printed testing aids using OpenScad software and MakerBot printers.
  • Utilized polylactic acid (PLA) filament for printing.
  • Measured half-value layer (HVL) and half-value density (HVD) of PLA across various beam qualities.

Main Results:

  • 3D printed aids demonstrated improved efficiency, accuracy, and repeatability in quality control testing.
  • HVL thicknesses for clear PLA ranged from 20 mm to 27 mm (50-120 kV).
  • HVD for clear PLA ranged from 2.37 g/cm² to 3.19 g/cm² (50-120 kV).

Conclusions:

  • 3D printed testing aids offer a cost-effective (under $2-$20) and accessible solution for radiographic quality control.
  • Open-source design files are available, promoting wider adoption and development.
  • PLA is a suitable material for these testing aids, with characterized radiographic properties.