Optimisation of the AP abdomen projection for larger patient body thicknesses

Gatt, Suzanne; Portelli, J.L.; Zarb, Francis

doi:10.1016/j.radi.2021.08.009

Cited by 7 publications

(8 citation statements)

References 13 publications

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“…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.…”

Section: Discussionsupporting

confidence: 91%

“…Lower tube potential values (70 kVp) were found to have the highest IQ and the lowest IQ was found at 110 kVp, still delivering acceptable images for diagnosis. These findings were concurred in studies by Gatt et al 25 and Kawashima and colleagues. 26 Gatt et al 25 compared the IQ and radiation dose (DAP values) for different body part thicknesses when undertaking a posteroanterior (PA) abdomen X-ray examination, IQ was assessed both visually (VGA method) and physically (SNR and CNR).…”

Section: Discussionsupporting

confidence: 91%

“…These findings were concurred in studies by Gatt et al 25 and Kawashima and colleagues. 26 Gatt et al 25 compared the IQ and radiation dose (DAP values) for different body part thicknesses when undertaking a posteroanterior (PA) abdomen X-ray examination, IQ was assessed both visually (VGA method) and physically (SNR and CNR). They found that with increasing part thicknesses, radiation doses increased whereas IQ decreased; again the highest IQ values were observed at lower kVp values (80 kVp), while 110 and 120 kVp were considered the optimal protocol that produced acceptable IQ with the lowest radiation dose.…”

Section: Discussionsupporting

confidence: 91%

Section: Discussionsupporting

confidence: 89%

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

Al‐Murshedi,

Alzyoud,

Benhalim

et al. 2023

J of Medical Radiation Sci

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IntroductionDifferences in patient size often provide challenges for radiographers, particularly when choosing the optimum acquisition parameters to obtain radiographs with acceptable image quality (IQ) for diagnosis. This study aimed to assess the effect of body part thickness on IQ in terms of low‐contrast detail (LCD) detection and radiation dose when undertaking adult chest radiography (CXR).MethodsThis investigation made use of a contrast detail (CD) phantom. Polymethyl methacrylate (PMMA) was utilised to approximate varied body part thicknesses (9, 11, 15 and 17 cm) simulating underweight, standard, overweight and obese patients, respectively. Different tube potentials were tested against a fixed 180 cm source to image distance (SID) and automatic exposure control (AEC). IQ was analysed using bespoke software thus providing an image quality figure inverse (IQFinv) value which represents LCD detectability. Dose area product (DAP) was utilised to represent the radiation dose.ResultsIQFinv values decreased statistically (P = 0.0001) with increasing phantom size across all tube potentials studied. The highest IQFinv values were obtained at 80 kVp for all phantom thicknesses (2.29, 2.02, 1.8 and 1.65, respectively). Radiation dose increased statistically (P = 0.0001) again with increasing phantom thicknesses.ConclusionOur findings demonstrate that lower tube potentials provide the highest IQFinv scores for various body part thicknesses. This is not consistent with professional practice because radiographers frequently raise the tube potential with increased part thickness. Higher tube potentials did result in radiation dose reductions. Establishing a balance between dose and IQ, which must be acceptable for diagnosis, can prevent the patient from receiving unnecessary additional radiation dose.

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Section: Discussionsupporting

confidence: 91%

Section: Discussionsupporting

confidence: 91%

Section: Discussionsupporting

confidence: 91%

Section: Discussionsupporting

confidence: 89%

See 2 more Smart Citations

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

Al‐Murshedi,

Alzyoud,

Benhalim

et al. 2023

J of Medical Radiation Sci

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“…For noise measurements, the noise (standard deviation “ σ ”) was calculated using ImageJ software. SNR and CNR were calculated using the following [ 23 ]:

…”

Section: Methodsmentioning

confidence: 99%

Optimization of Image Quality and Organ Absorbed Dose for Pediatric Chest X-Ray Examination: In-House Developed Chest Phantom Study

Pengpan

Rattanarungruangchai²,

Dechjaithat

et al. 2022

Radiology Research and Practice

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Purpose. This study aimed to identify proper exposure techniques to maintain optimal diagnostic image quality with minimum radiation dose for anteroposterior chest X-ray projection in pediatric patients. Methods. Briefly, an in-house developed pediatric chest phantom was constructed. Next, nanodot OSLDs were used for organ absorbed dose measurement and placed in the lung area, and the phantom was exposed to various exposure techniques (ranging from 50 to 70 kVp with 1.6, 2, and 2.5 mAs). After that, the phantom was used to assess image quality parameters, including SNR and CNR. Two radiologists assessed the subjective image quality using a visual grading analysis (VGA) technique. Finally, the figure of merit (FOM) was analyzed. Results. The developed phantom was constructed successfully and could be useful for dose measurement and image quality assessment. The absorbed dose varied from 0.009 to 0.031 mGy for the range of exposure techniques used. SNR and CNR showed a gradually increasing trend, while kVp and mAs values were increased. The highest kVp (70 kVp) produced the highest SNR and CNR, exhibiting a significant difference compared with 50 and 60 kVp ( P < 0.05 ). The overall VGA score was 3.2 ± 0.3, and the low kVp technique demonstrated better image quality compared with the reference image. Conclusion. The optimized exposure technique was identified as 60 kV and 2.5 mAs, indicating the highest FOM score. This work revealed practicable techniques that could be implemented into clinical practice for performing pediatric chest radiography.

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Perception of patient habitus and the influence on exposure factor selection and resultant imparted dose

Patterson,

Campbell–Adams,

Johnson

2024

Radiography

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Optimisation of the AP abdomen projection for larger patient body thicknesses

Cited by 7 publications

References 13 publications

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

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

Optimization of Image Quality and Organ Absorbed Dose for Pediatric Chest X-Ray Examination: In-House Developed Chest Phantom Study

Perception of patient habitus and the influence on exposure factor selection and resultant imparted dose

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