Comparison between a built-in "dual side" chest imaging device and a standard "single side" CR.
An integrated readout computed radiography system (Fuji XU-D1) incorporating dual-side imaging plates (ST-55BD) was analyzed in terms of modulation transfer function (MTF), noise power spectrum (NPS), and detective quantum efficiency (DQE) for standard beam qualities RQA 9 and RQA 5. NPS and DQE were assessed using a detector entrance air kerma consistent with clinical practice for chest radiography. Similar investigation was performed on a standard reader (Fuji FCR 5000) using single-side imaging plates (ST-VI). Negligible differences were found between the MTFs of the two imaging systems for RQA 9, whereas for RQA 5 the single-side system exhibited slightly superior MTF. Regarding noise response, the dual-side system turned out to be better performing for both beam qualities over a wide range of frequencies. For RQA 9, at 8 microGy, the DQE of the dual-side system was moderately higher over the whole frequency range, whereas for RQA 5, at 10 microGy, significant improvement was found at low- and midrange frequencies. As an example, at 1 cycle/mm, the following improvements in the DQE of the dual-side system were observed: +22% (RQA 9, at 8 microGy), +50% (RQA 9, at 30 microGy), and +45% (RQA 5, at 10 microGy).
Riccardi
Lucia
L
Struttura Complessa Interaziendale di Fisica Sanitaria, Azienda Ospedale Università di Padova, via Giustiniani 1, Padova, 35128 Italy.
Cauzzo
Maria Cristina
MC
Fabbris
Roberto
R
Tonini
Eugenia
E
Righetto
Roberto
R
D004867:Equipment Design; D019544:Equipment Failure Analysis; D006801:Humans; D011856:Radiographic Image Enhancement / Q000295:instrumentation* / Q000379:methods; D013902:Radiography, Thoracic / Q000295:instrumentation* / Q000379:methods; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014057:Tomography, X-Ray Computed / Q000295:instrumentation* / Q000379:methods; D014963:X-Ray Intensifying Screens