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Related Concept Videos

Compact Bone01:27

Compact Bone

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Most bones contain compact and spongy osseous tissue, but their distribution and concentration vary based on the bone's overall function.
Compact bone, also called cortical bone, is the denser, stronger of the two types of bone tissue. It is found under the periosteum and in the diaphyses of long bones, where it provides support and protection. The microscopic structural unit of compact bone is called an osteon, or haversian system. Each osteon is composed of concentric rings of calcified...
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Compacting Factor test01:22

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The compacting factor test is a method used to assess the workability of concrete. It is  especially suitable for concrete mixes containing aggregates up to one and a half inches in size. This test involves specialized equipment consisting of two truncated cone-shaped hoppers and a cylinder, all with polished interior surfaces to minimize friction.
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Base complementarity between the three base pairs of mRNA codon and the tRNA anticodon is not a failsafe mechanism. Inaccuracies can range from a single mismatch to no correct base pairing at all. The free energy difference between the correct and nearly correct base pairs can be as small as 3 kcal/ mol. With complementarity being the only proofreading step, the estimated error frequency would be one wrong amino acid in every 100 amino acids incorporated. However, error frequencies observed in...
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Uncertainty in Measurement: Accuracy and Precision03:37

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Scientists typically make repeated measurements of a quantity to ensure the quality of their findings and to evaluate both the precision and the accuracy of their results. Measurements are said to be precise if they yield very similar results when repeated in the same manner. A measurement is considered accurate if it yields a result that is very close to the true or the accepted value. Precise values agree with each other; accurate values agree with a true value. 
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Scientists typically make repeated measurements of a quantity to ensure the quality of their findings and to evaluate both the precision and the accuracy of their results. Measurements are said to be precise if they yield very similar results when repeated in the same manner. A measurement is considered accurate if it yields a result that is very close to the true or the accepted value. Precise values agree with each other; accurate values agree with a true value.  Highly accurate...
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Related Experiment Video

Updated: Feb 16, 2026

Intraoperative Video Consultation Following Bile Duct Transection Facilitates Direct OR Transfer for Robotic Hepaticojejunostomy at Tertiary Center
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Compact Intraoperative MRI: Stereotactic Accuracy and Future Directions.

Daniel Markowitz1, Dishen Lin, Sussan Salas

  • 1Department of Neurosurgery, Northwell Health, Manhasset, NY, USA.

Stereotactic and Functional Neurosurgery
|June 15, 2017
PubMed
Summary

The updated compact intraoperative MRI (iMRI) offers superior stereotactic navigation accuracy compared to standard MRI, validating low-field iMRI systems for improved surgical precision.

Keywords:
Intraoperative MRIPoleStarStereotactic accuracy

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Area of Science:

  • Neurosurgery
  • Medical Imaging
  • Biomedical Engineering

Background:

  • Accurate stereotactic navigation is crucial for intraoperative imaging.
  • Diagnostic imagers must provide data with high accuracy for surgical guidance.

Observation:

  • A new compact intraoperative MRI (iMRI) system with a 0.15-T magnet was evaluated.
  • Stereotactic accuracy was compared against a 1.5-T diagnostic MRI and an older iMRI model.

Findings:

  • The new iMRI system demonstrated lower mean error (1.24 mm) using T1-weighted images than the 1.5-T MRI (2.43 mm).
  • T2-weighted images from the newer iMRI showed reduced navigation error (1.28 mm) compared to the prior model (3.15 mm).

Implications:

  • Compact, low-field iMRI systems can achieve high accuracy through improved magnet design.
  • Eliminating image-to-surgical space registration enhances navigation precision.