Abstract: The disclosure relates to the field of medical image analysis, in particular to an image reconstruction and analysis method, system and device for saline contrast electrical impedance pulmonary perfusion and cardiac imaging. A saline contrast lung perfusion image reconstruction method, a pulsatile perfusion image reconstruction method, lung perfusion and regional V/Q noninvasive imaging method are included. The disclosure has very good application value in accurate reconstruction of medical images.

Abstract: A respirator with an adjustable pressure or volume flow curve has a control and analyzing unit, which is set up to determine the resistance R and the alveolar pressure Palv(t). The control and analyzing unit checks the functional dependence of Palv(t) and of the tidal volume Vol(t) for time intervals in which an indicator of the quality of a linear functional dependence of Palv(t) and Vol(t) meets a preset threshold criterion and to determine the elastance E or compliance C from the rise of the alveolar pressure Palv(t) as a function of the volume Vol(t) only in the time intervals thus determined.