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Comparison between a built‐in “dual side” chest imaging device and a standard “single side” CR
Author(s) -
Riccardi Lucia,
Cauzzo Maria Cristina,
Fabbris Roberto,
Tonini Eugenia,
Righetto Roberto
Publication year - 2007
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.2400619
Subject(s) - detective quantum efficiency , optical transfer function , radiography , optics , computed radiography , goniometer , nuclear medicine , medicine , radiology , physics , image quality , computer science , artificial intelligence , image (mathematics)
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 μ Gy , the DQE of the dual‐side system was moderately higher over the whole frequency range, whereas for RQA 5, at 10 μ Gy , 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 μ Gy ), + 50 % (RQA 9, at 30 μ Gy ), and + 45 % (RQA 5, at 10 μ Gy ).