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Related Concept Videos

Assessment of Ventilation II: Respiratory Depth and Rhythm01:29

Assessment of Ventilation II: Respiratory Depth and Rhythm

Respiratory Depth
Respiratory depth measures the volume of air inhaled or exhaled during a breath. It can vary from shallow to deep and typically remains consistent when a person is at rest or asleep. Occasionally, individuals will automatically inhale deeply, known as sighing, which inflates the lungs with more air than normal breathing.
To assess respiratory depth, observe the degree of chest excursion or movement:
Assessment of Ventilation I: Respiratory Rate01:20

Assessment of Ventilation I: Respiratory Rate

Assessment of Ventilation
A Ventilation assessment is critical for monitoring a patient's health status. Respiration, one of the most accessible vital signs, provides insights into the function of numerous body systems and can indicate serious health issues, such as brainstem injuries from head trauma.
Critical Guidelines for Assessing Ventilation:
Assessment of Respiration01:23

Assessment of Respiration

The respiratory system's basic structures and primary functions lay the foundation for nurses' comprehensive respiratory assessments. This assessment includes subjective and objective data to gauge the patient's respiratory health.
Subjective Assessment: Nurses interview the patient to gather information directly during the subjective assessment. It includes questions about the individual's medical history, medications, and symptoms, focusing on past respiratory conditions like asthma or COPD,...
Physical Assessment of the Respiratory Tract II: Inspection01:27

Physical Assessment of the Respiratory Tract II: Inspection

Physical assessment of the respiratory tract through inspection is a crucial step in understanding the patient's respiratory health. It provides insights into the functioning of the respiratory system, the musculoskeletal structure, and even the patient's nutritional status. This comprehensive approach involves observing several vital aspects: chest configuration, breathing patterns, respiratory rates, skin color, and use of accessory muscles.
Chest Configuration
The chest configuration can...
Respiratory Volumes01:15

Respiratory Volumes

Respiratory volumes are crucial metrics, meticulously measured to quantify the air exchanged in and out of the lungs during various phases of the breathing cycle. These precise measurements are vital for assessing lung function, diagnosing respiratory conditions, and monitoring overall respiratory health. Each parameter provides specific insights into the mechanics of breathing and the functional capacity of the lungs.
Tidal Volume (TV) Tidal volume (TV) is the air inhaled or exhaled in a...
Assessment of Diffusion and Perfusion01:17

Assessment of Diffusion and Perfusion

Understanding and evaluating diffusion and perfusion is critical in assessing a patient's respiratory and circulatory health. These processes play key roles in maintaining the body's internal environment, ensuring that tissues receive adequate oxygen while waste products are efficiently removed.
The Role of Diffusion in Respiration
Diffusion is the process by which molecules move from an area of higher concentration to an area of lower concentration. In the respiratory system, this principle...

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Related Experiment Video

Updated: May 30, 2026

3D Cine Magnetic Resonance Imaging of Respiratory Motion in Mechanically Ventilated Mice and Rats
08:22

3D Cine Magnetic Resonance Imaging of Respiratory Motion in Mechanically Ventilated Mice and Rats

Published on: September 19, 2025

Contour based respiratory motion analysis for free breathing CT.

Justus Adamson1, Tingliang Zhuang, Fang-Fang Yin

  • 1Department of Radiation Oncology, Duke University Medical Center, Durham, NC 27710, USA. justus.adamson@duke.edu

Computers in Biology and Medicine
|August 16, 2011
PubMed
Summary

This study introduces a novel method to measure superior-inferior (SI) motion using 3D CT scans. The technique accurately quantifies target motion, even without prior knowledge of the static shape.

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Management of Respiratory Motion Artefacts in 18F-fluorodeoxyglucose Positron Emission Tomography using an Amplitude-Based Optimal Respiratory Gating Algorithm
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Management of Respiratory Motion Artefacts in 18F-fluorodeoxyglucose Positron Emission Tomography using an Amplitude-Based Optimal Respiratory Gating Algorithm

Published on: July 23, 2020

Area of Science:

  • Medical Imaging
  • Radiology
  • Computational Anatomy

Background:

  • Quantifying organ motion during free-breathing CT (FBCT) is crucial for accurate radiation therapy planning.
  • Traditional methods often require respiratory gating or pre-defined static target shapes, limiting applicability.

Purpose of the Study:

  • To develop and validate a method for quantifying superior-inferior (SI) motion of rigid targets using only 3D contours from FBCT.
  • To assess the method's performance with and without prior knowledge of the static target shape.

Main Methods:

  • Utilized 2D contour similarity (Jaccard Index) between frames.
  • Incorporated a population-based density function to estimate motion amplitude probability.
  • Validated using computational simulations and phantom measurements.

Main Results:

  • Motion reconstruction was frequently feasible, demonstrating the method's potential.
  • Accuracy decreased when assumed static shapes differed from actual shapes.
  • The analysis showed robustness for slow scanning speeds relative to motion when no static shape was assumed.

Conclusions:

  • The proposed method offers a viable approach for SI motion quantification from FBCT data.
  • The technique is adaptable, working with or without a known static target shape.
  • Further refinement may improve accuracy, particularly for faster scanning or more complex motion patterns.