Reduction Method of Patients' Radiation Dose Considering the Size of Field of View with a Digital Cine X-ray System Loading a Flat-panel Detector
Flat−panel Detector搭載型血管撮影装置における視野サイズを考慮した患者被ばく線量低減法

Mamoru Kato, Koichi Chida, Kyouhei Yoshida, Fumiaki Sasaki, Masafumi Sasaki, Hajime Oosaka, Tetsuo Tosa
2011 Japanese Journal of Radiological Technology  
Angiographic equipment has tended toward using flat-panel detector (FPD). However, the radiation dose varies depending on the size of field of view (FOV) in the FPD. Although we were using 7 inch FOV in cardiac procedures, we examined a way to reduce the patients' radiation dose by using 8 inch FOV utilizing a digital zoom processing. We measured the absorbed dose rates at an interventional reference point (IRP) with 20 cm acrylic board to compare 8 inch FOV using a digital zoom processing with
more » ... 7 inch FOV. Additionally we visually evaluated these phantom images. Result of comparison of absorbed dose rates at IRP, 8 inch FOV using a digital zoom processing was reduced more than 7 inch FOV (fluoroscopic 29.0% and digital cine 37.5%). These phantom images were of equivalent quality. The method to use 8 inch FOV utilizing a digital zoom processing technique in cardiac procedures is one of the effective radiation exposure reduction methods. Key words: radiation dose, patient dose, percutaneous coronary intervention (PCI), size of field of view, flat-panel detector 010-0874 6-17
doi:10.6009/jjrt.67.1443 pmid:22104237 fatcat:stvfs54zfnewrarafzdgmgicze