IA 004 A Comparison of Automated and Manual Measurements of Intima-media Thickness in Clinical Practice

Freire, C. Sanz; Ribeiro, Alp; Barbosa, Fbl; Nogueira, AI; Almeida, Mcc; Mm, Barbosa; Silva, Acs; Oliveira, A. S.

doi:10.1016/s1567-5688(09)71742-8

Cited by 4 publications

(5 citation statements)

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“…Although manual and semi-automated techniques correlate well in adults, 17,37,38 our results are in keeping with Mac Ananey et al 17 who found variability between the 2 techniques. In their study of 126 healthy adults, with a Pearson correlation of 0.8 but an ICC of 0.74 between the 2 techniques, manual IMT overestimated the measurements with respect to the semi-automated technique, while the latter was more reproducible.…”

Section: Discussionsupporting

confidence: 90%

Measuring Carotid Intima-Media Thickness in Young Adults Born Preterm: Comparison of Manual Versus Semi-automated B-Mode Ultrasound

Jalbout

Flahault

Shahi

et al. 2023

Journal for Vascular Ultrasound

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Introduction: Young adults born very preterm have increased cardiovascular risks. While intima-media thickness of the common carotid artery is an early marker of atherosclerosis in adults, the most reliable method of its measurement is not established in this population. The purpose of this study is to compare manual and semi-automated B-mode ultrasound intima-media thickness measurement techniques in adults born very preterm and full-term. Methods: Intima-media thickness was measured in adults 18 to 29 years born very preterm (<30 weeks’ gestation) or full-term (≥37 weeks’ gestation) using B-mode ultrasound. Analyses included intraclass correlation coefficient (ICC) and relationships with prematurity status, age, body mass index, and metabolic and respiratory comorbidities. Results: There were 86 preterm-born participants (58% women) and 85 full-term (56% women), mean age 23 ± 2 years. Intra-observer agreement was better using semi-automated (ICC = 0.89; 95% confidence interval (CI) = [0.86-0.91]) than manual measurement (ICC = 0.73; 95% CI = [0.65-0.79]). Measures obtained using both techniques did not detect any differences according to prematurity status, did not correlate with age, and moderately correlated with body mass index. The semi-automated technique showed higher intima-media thickness values in men vs women and overall gave higher values. Results obtained through both techniques moderately correlated with each other when looking at subgroups: preterm group ICC of 0.53, full-term group ICC of 0.62. Conclusion: Manual and semi-automated intima-media thickness measurements moderately correlate in young adults. The semi-automated technique is more reproducible. Both techniques are useful in discriminating intima-media thickness according to weight. This study identifies variance of results according to different techniques of measurements. Adherence to a single technique is recommended in young adults born prematurely. Clinical implication includes adherence to the same technique for risk stratification and for follow-up of these patients.

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Section: Discussionsupporting

confidence: 90%

Measuring Carotid Intima-Media Thickness in Young Adults Born Preterm: Comparison of Manual Versus Semi-automated B-Mode Ultrasound

Jalbout

Flahault

Shahi

et al. 2023

Journal for Vascular Ultrasound

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“…Manual measurement of cIMT could be the source of variability between the two imaging modes and the use of an automated computerized analysis reduces the variability in measuring cIMT and is a preferable method for cIMT assessment [3,14]. However, it is worth mentioning that in clinical practice a manual measurement of cIMT is usually performed for being faster and more feasible in practice and might be available in centers due to lack of funding.…”

Section: Discussionmentioning

confidence: 99%

Variability of Common Carotid Intima-media Thickness Measured using B-mode and M-mode Ultrasound Imaging

Alghamdi¹,

Zabani²,

Alahmari³

et al. 2023

SaudiRad

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Background: Common carotid artery intima-media thickness (cIMT) has been associated with cardiovascular diseases, including stroke and coronary heart disease. There is a limited number of studies that specifically address the variability of ultrasound imaging modes in measuring cIMT. Therefore, this study aimed to assess the agreement-level and inter-observer reproducibility of cIMT measurements using B-mode and M-mode. Materials and Methods: B-mode and M-mode ultrasound imaging were used in measuring cIMT of healthy subjects using linear-array transducer. Inter-imaging mode agreement and inter-observer reproducibility of B-mode and M-mode were assessed using Intraclass correlation coefficient (ICC). Differences in cIMT measurements between imaging modes and observers were determined using paired t-test Results: There was significant difference between B-mode and M-mode in measuring cIMT (mean difference (MD), 0.03 mm, 95% CI 0.02 - 0.05, p<0.001). Intra-imaging mode agreement was poor with ICC of 0.39. Inter-observer reproducibility of cIMT measured using B-mode and M-mode were good and moderate, respectively, (B-mode ICC of 0.76, 95% CI 0.64 - 0.84, p<0.01; M-mode ICC of 0.68, 95% CI 0.52 - 0.78, p<0.01). No significant difference between the two observers in measuring cIMT measured using B-mode or M-mode (B-mode p=0.3; M-mode p=0.4). Conclusion: There was a significant difference and poor intra-imaging mode agreement between B-mode and M-mode in measuring cIMT. B-mode showed higher inter-observer reproducibility of cIMT measurement than M-mode. Further studies investigating the variability and agreement between ultrasound imaging modes of patients with thickened cIMT are required.

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“…In adults, multiple studies have shown that automatic measurements usually have better reproducibility and lower variability compared to manual measurements, as it is illustrated in our study with a low coefficient of variation (3.93%) for the semi-automatic B-mode technique. 28,29 Dogan et al 30 found a poor correlation between manual and automated techniques. In fact, the precision of a manual system on a radiological screen for one pixel is of .2 mm, therefore, for a 10 mm segment, accuracy is of 9%.…”

Section: Discussionmentioning

confidence: 99%

Non-Invasive Vascular Elastography as a One-Step Imaging Technique to Evaluate Early Vascular Changes in Children Compared to B-Mode-Based Intima-Media Thickness Technique : A Validation Study Using Inter- and Intra-Rater Reliability

et al. 2022

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Background: Childhood obesity is linked to higher adult mortality and morbidity from atherosclerosis. It is primordial to detect at-risk children earlier-on to prevent disease progression. Carotid intima-media thickness (IMT) is a subclinical radiological marker for early atherosclerosis. B-mode ultrasound is a known technique to assess IMT, but no gold standard technique exists in children. Non-invasive vascular elastography (NIVE) using speckle statistics is an innovative alternative to evaluate IMT and adds by providing translation, strain and shear strain measurements. Validation studies for both techniques lack in children. Purpose: Validate the reproducibility of the 2 techniques in Canadian children. Methods: We conducted a prospective study where anthropometry, blood pressure, IMT and elastography were measured. Six operators obtained 2 measurements for both carotid arteries using both techniques, for a total of 720 measurements. Inter- and intra-class correlation coefficients (ICC) were calculated for each measurement technique and elastography parameters. Results: 30 participants (13.0 ± 1.26 years, 17 girls) were recruited. Twelve were overweight. No significant difference was found in mean IMT between weight groups for either technique ( P = .15 and P = .60). We found excellent inter- (ICC = .98 [95% Confidence Interval (CI): .97; .99]) and intra- (ICC = .90-.93) operator reliability for the B-mode technique, and good inter (ICC = .70 [95% CI: .47; .85]) and intra- (ICC = .71-.91) operator reliability for the NIVE-based technique. Poor reliability was found between techniques (ICC = .30 [95% CI: −.31; .65). For elastography parameters, translation was the most reliable (ICC = .94-.95). Conclusion: IMT measurement is reproducible in children but not between techniques. NIVE gives the advantage of evaluating elastography.

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IA 004 A Comparison of Automated and Manual Measurements of Intima-media Thickness in Clinical Practice

Cited by 4 publications

References 0 publications

Measuring Carotid Intima-Media Thickness in Young Adults Born Preterm: Comparison of Manual Versus Semi-automated B-Mode Ultrasound

Measuring Carotid Intima-Media Thickness in Young Adults Born Preterm: Comparison of Manual Versus Semi-automated B-Mode Ultrasound

Variability of Common Carotid Intima-media Thickness Measured using B-mode and M-mode Ultrasound Imaging

Non-Invasive Vascular Elastography as a One-Step Imaging Technique to Evaluate Early Vascular Changes in Children Compared to B-Mode-Based Intima-Media Thickness Technique : A Validation Study Using Inter- and Intra-Rater Reliability

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