DIGITAL RADIOGRAPHY: IMAGE QUALITY AND RADIATION DOSE

Background: Until now few studies have specially validated whether the sex, body mass index, or imaging projections of pediatric patients undergoing chest digital radiography (DR) affect the radiation dose and image quality. Introduction: To investigate the impact of different photography positions on radiation dose for and image quality of chest DR for 3-4-year-old children. Method: One-hundred twenty 3-4-year-old patients who required chest DR were included. The patients were divided into 3 groups, with 40 patients in each group: supine anterior-posterior projection (APP), standing APP and posterior-anterior projection (PAP). The dose area product (DAP) and entrance surface dose (ESD) values for every patient were recorded after each exposure. The visual grading analysis score (VGAS) was used to evaluate image quality. Result: The DAP and ESD values for the standing PAP and APP groups were significantly lower than those for the supine APP group (0.19 ± 0.04 dGy cm2 and 0.05 ± 0.01 mGy vs 0.25 ± 0.05 dGy cm2 and 0.08 ± 0.01 mGy, P<0.05, respectively). Additionally, the VGAS for the standing APP group was significantly lower than those for the standing PAP and supine APP groups (28.58 ± 0.96 vs 29.08 ± 0.94 and 29.03 ± 0.80, P<0.05, respectively), whereas the pulmonary field area for the standing PAP group was significantly higher than those for the standing and supine APP groups (118.95 ± 16.81 cm2 vs 105.65 ± 14.76 cm2 and 105.24 ± 16.32 cm2, P<0.05, respectively). However, there were no statistically significant differences in DAP, ESD, VGAS, pulmonary field area and body mass index between the male and female patients in the three groups (P>0.05, respectively). Conclusion: The standing PAP should be the first projection choice for chest DR for 3-4-year-old children; compared with the supine and standing APP, the standing PAP may improve image quality and decrease the required radiation dose.

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Slot-Scan Digital Radiography of the Lower Extremities: a Comparison to Computed Radiography with Respect to Image Quality and Radiation Dose

Korean Journal of Radiology ◽

10.3348/kjr.2009.10.1.51 ◽

2009 ◽

Vol 10 (1) ◽

pp. 51 ◽

Cited By ~ 5

Author(s):

Kwang Hwi Lee ◽

Jong Won Kwon ◽

Young Cheol Yoon ◽

Sang-Hee Choi ◽

Jee Young Jung ◽

...

Keyword(s):

Image Quality ◽

Radiation Dose ◽

Digital Radiography ◽

Computed Radiography ◽

Lower Extremities

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Assessment of image quality and radiation dose in some models of digital radiography systems – A Pehamed FLUORAD A + D phantom study

Radioprotection ◽

10.1051/radiopro/2018012 ◽

2018 ◽

Vol 53 (2) ◽

pp. 139-144

Author(s):

H. Kaheni ◽

A. Chaparian ◽

R. Nafisi-Moghadam ◽

N. Hamzian

Keyword(s):

Image Quality ◽

Radiation Dose ◽

Digital Radiography ◽

Quality Parameters ◽

Digital Systems ◽

Quality Performance ◽

Dose Area Product ◽

Ideal Situation ◽

Conventional Film ◽

Area Product

Digital radiography (DR) systems have been recently introduced as a developed technology that is replacing conventional film–screen systems in many countries around the world. Ideal situation in radiography is to maximize the image quality while minimizing the patient dose. The purpose of this study was to compare image quality and radiation dose in different digital radiography systems. Four different digital systems are compared in terms of their image quality performance and dose area product (DAP). Images of Pehamed FLUORAD A + D phantom were obtained for each DR system. Image quality parameters (contrast resolution (CR), spatial resolution (SR), and contrast-to-noise ratio (CNR)) and DAP were significantly different between different digital systems. It was shown that all four quantities increased with increasing exposure parameters in all systems. Image quality parameters of the SEDECAL system were higher than that in other systems (p ≤ 0.05). At the stable DAP (100 mGy.cm2), means of CR, CNR, and SR in the SEDECAL system were 6.38 ± 0.797, 29.70 ± 0.85 and 3.10 ± 0.38 lp/mm, respectively. The results of this investigation can be taken into consideration in the selection and purchasing of new systems in order to preserve patients as well as radiographers from unnecessary radiation dose.

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Influence of the use of various imaging units and projections on the radiation dose received by children during chest digital radiography

PLoS ONE ◽

10.1371/journal.pone.0255749 ◽

2021 ◽

Vol 16 (8) ◽

pp. e0255749

Author(s):

Hongrong Xu ◽

Kaiping Huang ◽

Bo Liu ◽

Jinhua Cai ◽

Huan Zheng ◽

...

Keyword(s):

Image Quality ◽

Radiation Dose ◽

Digital Radiography ◽

Visual Grading ◽

Dose Area Product ◽

Visual Grading Analysis ◽

Area Product ◽

The Right ◽

The Impact ◽

Field Area

Objective To investigate the impact of the use of different imaging units and projections on radiation dose and image quality during chest digital radiography (DR) in 3- and 4-year-old children. Methods Two hundred forty 3- and 4-year-old participants requiring chest DR were included; they were divided into three groups: supine anterior-posterior projection (APP), standing APP and standing posterior-anterior projection (PAP). Each group included 40 participants who were evaluated using the same imaging unit. The dose area product (DAP) and the entrance surface dose (ESD) were recorded after each exposure. The visual grading analysis score (VGAS) was used to evaluate image quality, and the longitudinal distance (LD) from the apex of the right lung to the apex of the right diaphragm was used to evaluate the inspiration extent. Results DAP and ESD were significantly lower in the standing PAP and APP groups than in the supine APP group (P<0.05), but LD was significantly higher in the standing PAP and APP groups than in the supine APP group (P<0.05). Additionally, the pulmonary field area was significantly higher for the standing PAP group than for the standing and supine APP groups (P<0.05). The correlations between ESD, DAP, and VGAS were positive (P<0.001), showing that larger ESD and DAP correspond to higher VGAS. The correlations between ESD, DAP, and body mass index (BMI) were also positive (P<0.05), indicating that higher BMI corresponds to larger ESD and DAP. Finally, no differences in DAP, ESD, VGAS, LD, pulmonary field area, or BMI were noted between males and females (P>0.05). Conclusion The radiation dose to superficial organs may be lower with standing PAP than with standing APP during chest DR. Standing PAP should be selected for chest DR in 3- and 4-year-old children, as it may decrease the required radiation dose.

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