Evaluation of chest and abdominal exposure dose appropriate for a digital image reader system incorporating a columnar-crystal structured phosphor plate and a contrast-detail phantom

Abstract

We evaluated a newly developed digital image reader incorporating a columnar-crystal structured phosphor plate (CPP) to determine its effectiveness for chest and abdominal exposures by assessing contrast-detail (C-D) curves and image quality figure values obtained from a C-D phantom. With the help of five radiologic technologists with 5 years or more of experience in the interpretation of plain radiographs, we assessed chest and abdominal radiographic films that had undergone image processing. The exposure dose required for obtaining the same image quality under chest exposure conditions (110 kV) was 66% of that necessary for a conventionally used computed radiography system incorporating a powder phosphor plate, whereas the percentage under abdominal exposure conditions (85 kV) was 82%. The rate of dose reduction varied depending on the anatomic region radiographed, the exposure conditions applied, and the method of image processing employed. Because the CPP has a higher X-ray detection efficiency than the hitherto-used powder phosphor plate, its use has to potential to reduce the patients' radiation exposure dose.

Effects of body part thickness on low‐contrast detail detection and radiation dose during adult chest radiography

“…They found that visual IQ (VGA method) was increased at low tube potentials for both average and obese size patients. The result from our study is also comparable with Moore et al 15 Our study's findings are comparable with those of Alzyoud and colleagues, 24 Gatt et al, 25 Kawashima and colleagues 26 and Moore et al 28 despite the fact that the techniques, IQ types, phantom types and thicknesses and imaging protocols differed.…”

“…Improved IQF inv values in clinical practice could improve the identification of subtle diseases, for example, small lung nodules. 14,15 Moreover, a physical IQ method was used for calculating IQF inv using CDRAD 2.0 analyser software which offers high reliability and is unaffected by differences in human eyesight and experience. 16 The CDRAD 2.0 phantom and IQF inv measurements have been used widely for optimization studies and when comparing different DR detector types.…”

Relationship between body habitus and image quality and radiation dose in chest X-ray examinations: A phantom study

“…The high mAs values associated with the larger size phantom led to improved IQ. It has been demonstrated from the literature that there is a direct relationship between mAs and the IQ [26][27][28]. Two x-ray machines H2X1 and H2X2 (Fig.…”

Calculating the target exposure index using a deep convolutional neural network and a rule base

“…In particular, the quality of an image is determined by its physical characteristics and by visual assessment. However, physical characteristics such as the detective quantum efficiency [13,14] and image contrast [15,16] are still difficult to apply to clinical images, as the anatomical background has not been considered [1]. Moreover, analytical visual assessment methods, such as receiver operating characteristic curve analysis and visual grading characteristics analysis [17][18][19][20][21][22][23][24], are time-consuming and require advanced medical knowledge.…”