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Related Concept Videos

Radiological Investigation II: MRI and Ventilation Perfusion Scan01:30

Radiological Investigation II: MRI and Ventilation Perfusion Scan

Description
Magnetic Resonance Imaging (MRI) and Ventilation Perfusion Scans are two radiological investigations that offer detailed diagnostic images of the body, particularly lung structures.
MRI
MRI uses magnetic fields and radiofrequency signals to distinguish between normal and abnormal tissues. This technology provides a more detailed diagnostic image than CT scans, enabling it to characterize pulmonary nodules, stage bronchogenic carcinoma, and evaluate inflammatory activity in...
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: Jun 5, 2026

Phase-Resolved Functional Lung MRI for Pulmonary Ventilation and Perfusion (V/Q) Assessment
05:56

Phase-Resolved Functional Lung MRI for Pulmonary Ventilation and Perfusion (V/Q) Assessment

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Association between Impaired Lung Function and Pulmonary Perfusion Defects Assessed by Phase-resolved Functional Lung

Tao Ouyang1,2,3,4, Qiming Liu1,3,4, Andreas Voskrebenzev5,6

  • 1Department of Radiology, Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, China.

Radiology. Cardiothoracic Imaging
|June 4, 2026
PubMed
Summary

Impaired lung function, including preserved ratio impaired spirometry (PRISm), restrictive physiology (RP), and airflow obstruction (AO), is linked to increased pulmonary perfusion defects (QDP) detected by phase-resolved functional lung (PREFUL) MRI.

Keywords:
Lung EmphysemaMR-Functional ImagingPerfusion DefectsPhase-resolved Functional LungPreserved Ratio Impaired SpirometryThoraxVentilation Defects

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Area of Science:

  • Radiology and Imaging
  • Pulmonary Medicine
  • Medical Diagnostics

Background:

  • Lung function impairment affects a significant portion of the population.
  • Pulmonary perfusion defects can indicate underlying respiratory disease.
  • Phase-resolved functional lung (PREFUL) MRI offers a method to assess lung perfusion.

Purpose of the Study:

  • To investigate the association between various types of impaired lung function and pulmonary perfusion defect percentage (QDP).
  • To utilize PREFUL MRI to quantify perfusion defects in relation to spirometry results.
  • To explore potential nonlinear relationships between lung function and perfusion defects.

Main Methods:

  • Prospective study involving 287 participants.
  • Spirometry to classify lung function (normal, PRISm, RP, AO).
  • PREFUL MRI for ventilation/perfusion assessment and CT for emphysema evaluation.
  • Linear regression and restricted cubic spline (RCS) analyses were performed.

Main Results:

  • All categories of impaired lung function (PRISm, RP, AO) were significantly associated with higher QDP.
  • Lower FEV1% predicted, FVC% predicted, FEV1/FVC ratio, and higher emphysema percentage correlated with increased QDP.
  • Nonlinear associations were observed between pulmonary function indicators and QDP, with significant interactions in subgroup analyses.

Conclusions:

  • Impaired lung function is significantly associated with increased pulmonary perfusion defects.
  • PREFUL MRI is a valuable tool for detecting and quantifying perfusion abnormalities in patients with lung function impairment.
  • Findings highlight the link between spirometric abnormalities and perfusion deficits, underscoring the utility of advanced MRI techniques in respiratory assessment.