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
Background: Recent advances in X-ray detector and digital image post-processing technology have facilitated the performance of sequential radiography with extremely low doses .
Lung and cardiac function can be assessed in a simple,
low dose and cost-effective way with dynamic chest radiography based on a flat-panel detector (FPD).
Of particular note is blood flow evaluation based on changes in pixel values on dynamic chest radiographs without contrast media.
Previous research: There have been many reports showing the feasibility of pulmonary densitometry [2-6].
Some studies succeeded in blood circulation mapping based on changes in pixel value during cardiac pumping [7-9].
there has been no report demonstrating a normal projection of cardiothoracic blood circulation on dynamic chest radiographs,
which is essential as diagnostic criteria for the diagnosis of blood flow disorders with dynamic chest radiography.
Long-term goal: To develop a simple,
and cost-effective chest functional imaging with a dynamic FPD,
which allows us to assess the diaphragmatic movement,
local pulmonary ventilation,
and cardiothoracic blood circulation.
This study was performed to establish a normal cardiothoracic blood circulation map projected as changes in pixel value on dynamic chest radiographs and to evaluate the diagnostic performance of blood flow disorders based on the newly-developed diagnostic criteria in clinical cases.