Related Experiment Video
Updated: Sep 20, 2026

Phase-Resolved Functional Lung MRI for Pulmonary Ventilation and Perfusion (V/Q) Assessment
Published on: August 9, 2024
[Quantitative study of 99mTc-technegas SPECT for ventilatory impairment in pulmonary emphysema--regional
Katashi Satoh1, Masahiro Mitani, Yuka Yamamoto
1Department of Radiology, Kagawa Medical University.
Abstract:
99mTc-Technegas scintigraphy is used for evaluation of abnormality of ventilation in pulmonary emphysema. Although the abnormality of ventilation distribution is very easy to find, there is not an objective index. The evaluation is subjective and different by each radiologist. It was also difficult to compare each cases and the clinical course in the same case. The present study for quantitative evaluation has proved that excellent correlations is obtained between the mean voxel values of the lung and stage classification. Furthermore, a correlation is observed between the mean and FEV1.0%. These deta indicate that quantitative analysis of SPECT seem to be useful to classify the clinical stage and compare the each cases. And respiratory function decreases as much as chronic pulmonary emphysema exists in the lower lung field.
Related Concept Videos
Radiological Investigation II: MRI and Ventilation Perfusion Scan
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...
Imaging Studies II: Positron Emission Tomography and Scintigraphy
Fundamental Principles of PET
Pulmonary Embolism II: Diagnostic Studies and Interprofessional Care
Assessment of Diffusion and Perfusion
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...

