Related Experiment Video
Updated: Jul 27, 2026
12:29
Magnetic Resonance Imaging Quantification of Pulmonary Perfusion using Calibrated Arterial Spin Labeling
Published on: May 30, 2011
Non-breath-hold lung magnetic resonance imaging with real-time navigation
M A Schmidt1, G Z Yang, J Keegan
1Royal Brompton Hospital, Magnetic Resonance Unit, London, United Kingdom.
Magma (New York, N.Y.)
|June 1, 1997
Summary
This study introduces a new lung MRI navigation technique that does not require breath-holding, improving image quality for patients with lung disease. The method reduces motion artifacts, enabling clearer visualization of pulmonary structures.
Area of Science:
- Medical Imaging
- Pulmonary Medicine
- Biophysics
Background:
- Conventional Magnetic Resonance Imaging (MRI) navigation for lung imaging requires breath-holding, which is challenging for patients with respiratory conditions.
- Limited respiratory control in patients with lung disease often leads to motion artifacts, hindering accurate diagnosis and monitoring.
Purpose of the Study:
- To develop and assess a novel lung MRI navigation technique independent of patient cooperation and breath-holding.
- To enhance image quality and diagnostic capabilities for pulmonary diseases using MRI.
Main Methods:
- Implemented a navigator technique at 0.5 T using short echo-time imaging during normal breathing (diastolic phase).
- Excited a spin column orthogonal to the diaphragm before and after imaging segments for real-time diaphragm position tracking.
- Defined an acceptance window based on diaphragm position distribution during normal respiration to ensure correct image acquisition.
- Utilized real-time diaphragm position for dynamic phase-encoding step allocation in multislice acquisitions to reduce respiratory motion effects.
Main Results:
- Achieved significant improvements in lung MRI image quality.
- Reduced motion artifacts, leading to clearer visualization of pulmonary structures.
- Demonstrated enhanced visibility of smaller pulmonary vessels previously not discernible without navigation.
Conclusions:
- The developed non-cooperative navigation technique represents a substantial advancement for lung MRI.
- Improved image quality facilitates better detection and monitoring of pulmonary diseases.
- The method enhances the diagnostic utility of MRI in patients with compromised respiratory function.
Related Concept Videos
01:24Magnetic Resonance Imaging
Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...
01:30Radiological 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...
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...