An automatic method for measuring the fetal mean abdominal diameter (MAD) or abdominal circumference (AC) with ultrasound is proposed. From a correctly presented abdominal section suitable for MAD or AC measurement, t...An automatic method for measuring the fetal mean abdominal diameter (MAD) or abdominal circumference (AC) with ultrasound is proposed. From a correctly presented abdominal section suitable for MAD or AC measurement, the location of fetal abdomen is detected by image processing. Thereafter, an active contour model is converged along the abdominal boundary for measurement purposes. The validation data set contained 310 images of fetuses with gestational age (GA) from 14 to 41 weeks. The measurement success rate was 88.1%. By manually indicating the location of the abdomen, the success rate was further improved to 95.8% for the failed cases. The correlation between manual and automatic measurements was 0.95 and the intraclass correlation coefficient (ICC) was 0.976 (95% confidence interval (CI);0.969 - 0.981). The average method execution time was 0.3 s. The mean error was lower in young fetuses (0.4%) than in older fetuses (-2.1%). The proposed cross-platform method was implemented on a portable, low-cost ultrasound machine prototype targeted for low- and middle-income countries (LMIC);the results achieved were comparable to those of other state-of-the-art automatic methods.展开更多
<strong>Introduction:</strong> In our practice, renal measurements in patients with normal renal function usually appear to be lower compared to standards reported in reference literature. The standards ar...<strong>Introduction:</strong> In our practice, renal measurements in patients with normal renal function usually appear to be lower compared to standards reported in reference literature. The standards are probably different in our context. Given the importance of renal biometrics in nephrological practice, we felt it necessary to carry out this preliminary study in order to identify an order of reference measurements appropriate to our context. <strong>Methods:</strong> This was a cross-sectional study that took place from 18 August to 04 November 2018 at the Yalgado Ouedrarogo University Hospital Center. The first 100 subjects aged between 18 and 30 years who met the following inclusion criteria were selected: to be black african Burkinabe and to have normal renal function. The height, width and thickness of each kidney were measured using ultra-sound scanners. For statistical tests, a value of p < 0.05 was considered statistically significant. <strong>Results:</strong> The average age was 23.9 ± 6.1 years and the sex ratio was 2.2. Mean heights, widths and renal thicknesses were 94.5 ± 14.5, 38.7 ± 10.7 and 36.3 ± 10.3 mm, and 96.7 ± 16.7, 42.7 ± 16.7 and 36.8 ± 10.8 mm respectively for right and left kidneys. The distribution of the different renal dimensions in our sample followed a normal distribution. In the particular case of the right kidney, the probability that its height was between 79.2 and 109.7 mm was 0.95 and the probability that it was less than 79.2 mm or greater than 109.7 mm was 0.05. Renal height was significantly higher in subjects with height greater than 1.70 m (p ≤ 0.02). The left kidneys were on average significantly larger than the right kidneys (p = 0.0001). <strong>Conclusions:</strong> Our study is not extrapolable to the general population of Burkina Faso. It suggests, however, that the kidneys of the apparently healthy Burkinabe subject are smaller than what is reported in anatomy reference books. Our work, which is preliminary, should be deepened through a national survey. In the meantime, we should consider, in the nephrological assessment of the Burkinabe patient, the results of the renal biometrics we report.展开更多
目的探讨分析自动乳腺容积成像系统联合普通手持超声在乳腺肿物良恶性鉴别诊断中的价值。方法选取2022年4月—2023年3月在齐齐哈尔市第二医院超声科检查的符合纳入标准的乳腺肿物患者60名,均行自动乳腺容积成像系统(automated breast vo...目的探讨分析自动乳腺容积成像系统联合普通手持超声在乳腺肿物良恶性鉴别诊断中的价值。方法选取2022年4月—2023年3月在齐齐哈尔市第二医院超声科检查的符合纳入标准的乳腺肿物患者60名,均行自动乳腺容积成像系统(automated breast volume scanner,ABVS)检查和普通二维超声(handheld ultrasound,HHUS)检查,对声像图特点进行数据统计分析、随访观察图像和相应专业指数变化,以组织病理学诊断为金标准。结果HHUS准确率为76.4%,ABVS准确率为77.4%,二者联合准确率为87.7%;ABVS与HHUS敏感度比较,差异无统计学意义(χ^(2)=0.405,P>0.05),二者联合与HHUS、ABVS的敏感度和特异度分别比较,差异有统计学意义(P<0.05)。结论二者联合应用于乳腺癌的筛查及诊断,具有重要临床指导意义。展开更多
文摘An automatic method for measuring the fetal mean abdominal diameter (MAD) or abdominal circumference (AC) with ultrasound is proposed. From a correctly presented abdominal section suitable for MAD or AC measurement, the location of fetal abdomen is detected by image processing. Thereafter, an active contour model is converged along the abdominal boundary for measurement purposes. The validation data set contained 310 images of fetuses with gestational age (GA) from 14 to 41 weeks. The measurement success rate was 88.1%. By manually indicating the location of the abdomen, the success rate was further improved to 95.8% for the failed cases. The correlation between manual and automatic measurements was 0.95 and the intraclass correlation coefficient (ICC) was 0.976 (95% confidence interval (CI);0.969 - 0.981). The average method execution time was 0.3 s. The mean error was lower in young fetuses (0.4%) than in older fetuses (-2.1%). The proposed cross-platform method was implemented on a portable, low-cost ultrasound machine prototype targeted for low- and middle-income countries (LMIC);the results achieved were comparable to those of other state-of-the-art automatic methods.
文摘<strong>Introduction:</strong> In our practice, renal measurements in patients with normal renal function usually appear to be lower compared to standards reported in reference literature. The standards are probably different in our context. Given the importance of renal biometrics in nephrological practice, we felt it necessary to carry out this preliminary study in order to identify an order of reference measurements appropriate to our context. <strong>Methods:</strong> This was a cross-sectional study that took place from 18 August to 04 November 2018 at the Yalgado Ouedrarogo University Hospital Center. The first 100 subjects aged between 18 and 30 years who met the following inclusion criteria were selected: to be black african Burkinabe and to have normal renal function. The height, width and thickness of each kidney were measured using ultra-sound scanners. For statistical tests, a value of p < 0.05 was considered statistically significant. <strong>Results:</strong> The average age was 23.9 ± 6.1 years and the sex ratio was 2.2. Mean heights, widths and renal thicknesses were 94.5 ± 14.5, 38.7 ± 10.7 and 36.3 ± 10.3 mm, and 96.7 ± 16.7, 42.7 ± 16.7 and 36.8 ± 10.8 mm respectively for right and left kidneys. The distribution of the different renal dimensions in our sample followed a normal distribution. In the particular case of the right kidney, the probability that its height was between 79.2 and 109.7 mm was 0.95 and the probability that it was less than 79.2 mm or greater than 109.7 mm was 0.05. Renal height was significantly higher in subjects with height greater than 1.70 m (p ≤ 0.02). The left kidneys were on average significantly larger than the right kidneys (p = 0.0001). <strong>Conclusions:</strong> Our study is not extrapolable to the general population of Burkina Faso. It suggests, however, that the kidneys of the apparently healthy Burkinabe subject are smaller than what is reported in anatomy reference books. Our work, which is preliminary, should be deepened through a national survey. In the meantime, we should consider, in the nephrological assessment of the Burkinabe patient, the results of the renal biometrics we report.
文摘目的探讨分析自动乳腺容积成像系统联合普通手持超声在乳腺肿物良恶性鉴别诊断中的价值。方法选取2022年4月—2023年3月在齐齐哈尔市第二医院超声科检查的符合纳入标准的乳腺肿物患者60名,均行自动乳腺容积成像系统(automated breast volume scanner,ABVS)检查和普通二维超声(handheld ultrasound,HHUS)检查,对声像图特点进行数据统计分析、随访观察图像和相应专业指数变化,以组织病理学诊断为金标准。结果HHUS准确率为76.4%,ABVS准确率为77.4%,二者联合准确率为87.7%;ABVS与HHUS敏感度比较,差异无统计学意义(χ^(2)=0.405,P>0.05),二者联合与HHUS、ABVS的敏感度和特异度分别比较,差异有统计学意义(P<0.05)。结论二者联合应用于乳腺癌的筛查及诊断,具有重要临床指导意义。
