title: Basic imaging properties of an indirect flat-panel detector system employing irradiation side sampling (ISS) technology for chest radiography: comparison with a computed radiographic system.
abstract: The image quality and potential usefulness for patient skin-dose reduction of a newly developed flat-panel detector (FPD) system employing irradiation side sampling (ISS) were investigated and compared to a conventional computed radiography (CR) system. We used the X-ray beam quality of RQA 9 as noted in the standard evaluation method by the International Electrotechnical Commission 62220-1 to evaluate the image quality of the detector for chest radiography. The presampled modulation transfer function (MTF) of the ISS-FPD system was slightly higher than that of the CR system in the horizontal direction at more than 2.2 cycles/mm. However, the presampled MTF of the ISS-FPD system was slightly lower than that of the CR system in the vertical direction. The Wiener spectrum of the ISS-FPD system showed a 50-65 % lesser noise level than that of the CR system under the same exposure condition. The detective quantum efficiency of the ISS-FPD system was at least twice as great as that of the CR system. We conclude that the ISS-FPD system has the potential to reduce the patient skin dose compared to a conventional CR system for chest radiography.
authors.affiliation: Department of Health Sciences, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan. nobukazu.tanaka@gmail.com
authors.forename: Nobukazu
authors.initials: N
authors.lastname: Tanaka
authors.forename: Yuki
authors.initials: Y
authors.lastname: Yano
authors.forename: Hidetake
authors.initials: H
authors.lastname: Yabuuchi
authors.forename: Tsutomu
authors.initials: T
authors.lastname: Akasaka
authors.forename: Masayuki
authors.initials: M
authors.lastname: Sasaki
authors.forename: Masafumi
authors.initials: M
authors.lastname: Ohki
authors.forename: Junji
authors.initials: J
authors.lastname: Morishita
mesh_terms: D006801:Humans; D058958:Organs at Risk / Q000528:radiation effects; D019047:Phantoms, Imaging; D011829:Radiation Dosage; D013902:Radiography, Thoracic / Q000009:adverse effects / Q000295:instrumentation / Q000379:methods*; D012867:Skin / Q000528:radiation effects