@article{oai:shiga-med.repo.nii.ac.jp:00003843,
 author = {宮武, 秀光 and 田畑, 貴久 and 辻田, 靖之 and 藤野, 和典 and 江口, 豊 and MIYATA, Hisae and TABATA, Takahisa and TSUJITA, Yasuyuki and FUJINO, Kazunori and TANAKA, Rie and EGUCHI, Yutaka},
 issue = {4},
 journal = {Circulation journal : official journal of the Japanese Circulation Society},
 month = {Mar},
 note = {pdf, Background:
Recently, dynamic chest radiography (DCR) was developed to evaluate pulmonary function using a flat-panel detector (FPD), which can evaluate blood flow in the pulmonary artery without injection of contrast agents. This study investigated the ability of a FPD to measure physiological changes in blood flow and to detect pulmonary embolism (PE) in monkeys., Methods and Results:
DCR was performed in 5 monkeys using a FPD. Regions of interest (ROI) were placed in both lung fields of the image, and maximum changes in pixel value (∆pixel value) in the ROI were measured during 1 electrocardiogram cardiac cycle. Next, a PE model was induced using a Swan-Ganz catheter and additional images were taken. The ∆pixel value of the lungs in normal and PE models were compared in both supine and standing positions. The lung ∆pixel value followed the same cycle as the monkey electrocardiogram. ∆pixel values in the upper lung field decreased in the standing as compared to the supine position. In the PE model, the ∆pixel value decreased in the area of pulmonary blood flow occlusion and increased in the contralateral lung as compared to the normal model (normal model 1.287±0.385, PE model occluded side 0.428±0.128, PE model non-occluded side 1.900±0.431)., Conclusions:
A FPD could detect postural changes in pulmonary blood flow and its reduction caused by pulmonary artery occlusion in a monkey model., Journal Article},
 pages = {361--368},
 title = {Detection of Pulmonary Embolism Using a Novel Dynamic Flat-Panel Detector System in Monkeys.},
 volume = {85},
 year = {2021}
}