Pulmonary vessels, Thorax, Computer applications, Digital radiography, Fluoroscopy, Computer Applications-General, Perception image, Embolism / Thrombosis
R. Tanaka, S. Sanada, M. Oda, M. Suzuki, K. Sakuta, H. Kawashima, H. Iida; Kanazawa/JP
Visualization of blood cirulation: In all normal controls,
the pixel values measured in atrium,
and aortic arch increased in the systole phase and decreased in the diastole phase,
reflecting changes in normal circulation [12-15].
the pixel values measured in the ventricles changed in reverse,
decreased in the systole phase and increased in the diastole phase (Figure 7).
the resulting blood circulation map showed a left-right symmetric distribution decreasing from the hilar region to the peripheral region of the lung,
and no defective part was observed (Figure 7).
Statistical analysis: There was significant difference between the changes in pixel values measured in the hilar region and those measured in the peripheral region of the lung (P<0.05).
there were no significant differences among those measured in symmetrical positions at each lung area.
Clinical evaluation: Many abnormal cases showed a nonuniform distribution on the blood circulation map,
which were different from the normal pattern.
These findings were confirmed on the perfusion scintigrams (Figures 8 and 9).