title: [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].
abstract: 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 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.
authors: Division of Medical Technology, Akita Medical Center.
authors: Mamoru
authors: M
authors: Kato
authors: Koichi
authors: K
authors: Chida
authors: Kyouhei
authors: K
authors: Yoshida
authors: Fumiaki
authors: F
authors: Sasaki
authors: Masafumi
authors: M
authors: Sasaki
authors: Hajime
authors: H
authors: Oosaka
authors: Tetsuo
authors: T
authors: Tosa
mesh_terms: D007091:Image Processing, Computer-Assisted / Q000295:instrumentation* / Q000379:methods*; D019047:Phantoms, Imaging; D058996:Quality Improvement; D011829:Radiation Dosage; D011856:Radiographic Image Enhancement / Q000295:instrumentation* / Q000379:methods*; D014963:X-Ray Intensifying Screens