Optimal beam quality for chest flat panel detector system: realistic phantom study

Kuwahara, Chie; Aoki, Takatoshi; Oda, Nobuhiro; Kawabata, Jun; Sugimoto, Katsuhisa; Kobayashi, Michiko; Fujii, Masami; Korogi, Yukunori

doi:10.1007/s00330-019-5998-1

Cited by 10 publications

(7 citation statements)

References 17 publications

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“…These results support the findings of de Vries, whose contrast detail phantom imaging also saw slightly higher image quality scores when higher kVp values were used 4 . Although these results disagree with findings from a number of other studies, 9,14,20‐24 the clinical nature of this study design and the specific projections used may help explain the differences. Both Fauber 9 and Andria 20 imaged phantoms (a pelvis phantom and a Leeds Test Object phantom, respectively) in their research in strict laboratory settings, meaning all conditions of image acquisition were kept constant and identical tissue thickness and tissue type was used for all acquisitions.…”

Section: Discussioncontrasting

confidence: 99%

“…Geijer 5 found improved image quality and lowered effective patient doses when lumbar spine kVp values were reduced from 77 to 60 kVp for the AP projection and from 90 to 77 kVp for the lateral. Kuwahara 24 assessed image quality and lung lesion visibility on phantom chest radiographs varying from 90 to 140 kVp. Images acquired at 90 kVp were deemed to have superior image quality, with no significant difference seen between lesion visibility.…”

Section: Discussionmentioning

confidence: 99%

“…Images acquired at 90 kVp were deemed to have superior image quality, with no significant difference seen between lesion visibility. These two low‐kVp studies, however, utilised the more modern concept of variable detector exposure and also adjusted other radiographic factors to achieve these results, with Geijer 5 increasing the system speed from 400 to 800 and Kuwahara 24 adding copper filtration.…”

Section: Discussionmentioning

confidence: 99%

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An evaluation of the effect of tube potential on clinical image quality using direct digital detectors for pelvis and lumbar spine radiographs

Peacock

Steward

Riley

2020

J of Medical Radiation Sci

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Introduction: High kVp techniques, 15% or 10-kVp rules, are well-known dose reduction methods. Traditionally, the use of high tube potential (i.e. increased kVp) is associated with decreased radiographic contrast and overall image quality. Recent studies suggest contrast and image quality are not heavily reliant on kVp with digital systems. This study aims to assess the effects of the high tube potential technique on clinical radiographic image quality when using digital systems, to validate high kVp as a dose saving technique. Methods: A selection of comparable pelvis and lumbar spine radiographs were collected from the hospital's picture archiving and communication system (PACS), with technical factors recorded. All clinical radiographs were assessed by 5 senior radiographers using a 15-point visual grading analysis (VGA) rubric. Results: For 40 AP pelvis radiographs and 40 lateral lumbar spine radiographs, reduction in the dose area product (DAP) with higher kVp is seen. Average pelvis DAP at 75 kVp = 14.06 mGy.cm 2 ; 85 kVp = 7.47 mGy.cm 2. Average lumbar spine DAP at 80 kVp = 15.76 mGy.cm 2 ; 90 kVp = 14.83 mGy.cm 2. Image quality and contrast scores showed no statistically significant difference between the high and low kVp groups (z = 0.06 and 0.12, respectively). Average pelvis VGA score at 75 kVp = 11.26; 85 kVp = 12.55. Average lumbar spine VGA score at 80 kVp = 9.23; 90 kVp = 10.64. Conclusions: The high tube potential techniques allowed for reduced patient radiation doses whilst showing no degradation of diagnostic image quality in a clinical setting. This study successfully validates the high kVp technique as a useful tool for reducing patient radiation doses whilst maintaining high diagnostic image quality for digital pelvis and lumbar spine radiography.

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Section: Discussioncontrasting

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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An evaluation of the effect of tube potential on clinical image quality using direct digital detectors for pelvis and lumbar spine radiographs

Peacock

Steward

Riley

2020

J of Medical Radiation Sci

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“…In addition, 3- and 4-year-old children are susceptible to numerous respiratory tract diseases because of their physiological characteristics and because their immune systems are still developing. Chest DR is used in the radiologic diagnosis of respiratory illness in this population and can meet clinical needs [ 5 ]. Nonetheless, children are inclined to be uncooperative during chest DR, and the choice of a comfortable position for DR can therefore help guarantee a successful inspection and adequate image quality [ 4 ].…”

Section: Introductionmentioning

confidence: 99%

“…Previous studies [ 7 – 10 ] principally employed various combinations of tube voltage and current (milliampere seconds, mAs) to optimize exposure parameters for chest DR. The dose area product (DAP) and the entrance surface dose (ESD) were used to evaluate the radiation dose received, and the visual grading analysis score (VGAS) was applied to evaluate image quality [ 4 , 5 , 7 , 9 , 10 ]. However, these methods have some restrictions.…”

Section: Introductionmentioning

confidence: 99%

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

Huang

Liu

et al. 2021

PLoS ONE

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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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Dose reduction and image quality improvement of chest radiography by using bone-suppression technique and low tube voltage: a phantom study

2019

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Optimal beam quality for chest flat panel detector system: realistic phantom study

Cited by 10 publications

References 17 publications

An evaluation of the effect of tube potential on clinical image quality using direct digital detectors for pelvis and lumbar spine radiographs

An evaluation of the effect of tube potential on clinical image quality using direct digital detectors for pelvis and lumbar spine radiographs

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

Dose reduction and image quality improvement of chest radiography by using bone-suppression technique and low tube voltage: a phantom study

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