Comparison of A-mode and B-mode Ultrasound for Measurement of Subcutaneous Fat

Wagner, Dale R.; Teramoto, Masaru; Judd, Trenton; Gordon, Joshua P.; McPherson, Casey; Robison, Adrianna

doi:10.1016/j.ultrasmedbio.2019.11.018

Cited by 20 publications

(17 citation statements)

References 25 publications

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“…A relatively inexpensive (< $2,500) and user-friendly A-mode US designed specifically for the measurement of subcutaneous fat is a more practical option for fitness professionals who want to conduct body composition assessments on clients. Subcutaneous fat thicknesses from this A-mode device were comparable to observed thicknesses in dissected cadavers [13] and in-vivo B-mode US measurements [14]. The US method for measuring subcutaneous fat, including the technical principles and differences between A-mode and B-mode, was previously reviewed [15].…”

Section: Open Accesssupporting

confidence: 54%

Interrater reliability of novice examiners using A-mode ultrasound and skinfolds to measure subcutaneous body fat

Wagner

Teramoto

2020

PLoS ONE

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Examiners with minimal training and skill are often called upon to make body composition assessments using field methods. This study compared the interrater reliability of novice examiners for the skinfold (SKF) and A-mode ultrasound (US) methods of body composition assessment. Undergraduate Kinesiology majors (48 males, 32 females) with minimal training took both SKF and US measurements at three sites (males: chest, abdomen, thigh; females: triceps, suprailiac, thigh). Interrater reliability was significantly better for US compared to SKF at the thigh (ICCUS = 0.975, ICCSKF = 0.912) and abdomen (ICCUS = 0.984, ICCSKF = 0.693) for men and suprailiac (ICCUS = 0.978, ICCSKF = 0.883) for women. Additionally, interrater reliability of the US method was superior to the SKF method for the estimate of male body fat percentage (ICCUS = 0.990, ICCSKF = 0.862). The 95% CI was generally narrower for the US method than the SKF method at each site. The interrater reliability of the US method was superior to or equal to the SKF method for measuring subcutaneous body fat when novice examiners took the measurements.

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Section: Open Accesssupporting

confidence: 54%

Interrater reliability of novice examiners using A-mode ultrasound and skinfolds to measure subcutaneous body fat

Wagner

Teramoto

2020

PLoS ONE

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“…Compared with B-mode ultrasound devices, which map soft tissues in a two-dimensional image, A-mode devices are generally more costeffective and have less reliance on a technician's skill, training, and time. 20 However, we should be aware that the accuracy of the BV measurement using the Lilium was more affected by the patient's characteristics than that using the B-mode device. Yamaguchi et al reported that flattened bladder shape and large prostates could be factors in measurement error in the BV measurement using the Lilium.…”

Section: Discussionmentioning

confidence: 99%

Improvement in bladder volume reproducibility using A‐mode portable ultrasound bladder scanner in moderate‐hypofractionated volumetric modulated arc therapy for prostate cancer patients

Ohira

Komiyama

Kanayama

et al. 2022

J Applied Clin Med Phys

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Purpose This study introduced an A‐mode portable ultrasound bladder scanner, the Lilium® α‐200 (here after Lilium; Lilium Otsuka, Kanagawa, Japan), for the treatment of prostate cancer patients with hypofractionated volumetric modulated arc therapy to improve the reproducibility of bladder volume (BV). Materials and methods Thirty patients were advised to maintain full BV prior to computed tomography (CT) simulation and daily treatment. Among these, the BV of 15 patients was measured using Lilium until a BV of 80% in the simulation was achieved (with the Lilium group). Daily cone‐beam CT (CBCT) was performed for treatment. The correlation between BV measured by CBCT and Lilium was assessed. The differences in the BV and dosimetric parameters of the bladder in the CBCT versus planning CT were compared between the groups with and without Lilium. Results There was a significantly strong relationship (r = 0.796, p < 0.05) between the BVs measured using CBCT and Lilium. The relative BV ratios to simulation CT < 0.5 and > 2 were observed in 10.3% and 12.7%, respectively, of treatment sessions without Lilium group, while these ratios were 1% and 2.8%, respectively, in the Lilium group. The mean absolute difference in the range of V30Gy to V40Gy without Lilium sessions was significantly larger (p < 0.05) than that in the Lilium group. Conclusion The use of the A‐mode portable ultrasound bladder scanner significantly improved the reproducibility of the BV, resulting in few variations in the dosimetric parameters for the bladder.

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“…The infiltration of fat and fibrous tissues increases the number of echoes or reflections from the ultrasound within the muscle, which is directly correlated with increases in EI and, consequently, worsening muscle quality (WATANABE et al 2018). Another possibility for US is the measure of fat thickness (FT), which presents high reliability (ISHIDA et al 1992;WAGNER et al 2020).…”

Section: Teste Allium Cepa Lmentioning

confidence: 99%