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From Wikipedia, the free encyclopedia. A ventilation/perfusion lung scan, also called a V/Q lung scan, is a type of medical imaging using scintigraphy and medical isotopes to evaluate the circulation of air and blood within a patient's lungs, in order to determine the ventilation/perfusion ratio.he ventilation and perfusion phases of a V/Q lung scan are performed together and may include a chest x-ray for comparison or to look for other causes of lung disease. A defect in the perfusion images requires a mismatched ventilation defect to indicate pulmonary embolism.
Lung volume was the lung shape (i.e., ï¬atten it somewhat), this is mitigated estimated simply by counting the number of voxels in the by the lung inï¬ation that is part of the CT scan procedure. left and/or right lung and multiplying by the volume of The results of measuring the linear dimensions are the voxel.