多图谱图像分割方法在处理医学器官分割中体现了更高的分割效率,但目前已有的多图谱分割方法主要存在两个问题:一是分割多个感兴趣区域(regions of interest,ROI)时,会出现错误分割和错误间隙等问题;二是在分割多目标ROI时,会大大增加...多图谱图像分割方法在处理医学器官分割中体现了更高的分割效率,但目前已有的多图谱分割方法主要存在两个问题:一是分割多个感兴趣区域(regions of interest,ROI)时,会出现错误分割和错误间隙等问题;二是在分割多目标ROI时,会大大增加分割时间。针对上述问题,改进图像融合算法,提出加权联合表决算法(weighted combine voting,WCV)。算法将所有的待分割目标作为参与共同表决的对象,将图谱图像与目标图像之间的相似系数(dice)作为“投票”权重,通过一次“投票”过程就可以分割出所有的待分割目标。方法在实验数据集上得到的整体分割结构相似性、单个器官ROI相似性系数分别为:整体97.11%,肺部78.57%,血池76.03%,心肌80.10%,相比现有多图谱分割方法取得了更高的准确性。实验结果表明该方法可以使器官分割具有较高的鲁棒性,对临床应用具有现实意义。展开更多
IR36 has been used as an indica tester in screeningWCVs.However,artificial emasculation is not on-ly a time consuming work,but also may producefalse hybrids due to incomplete emasculation,andmay injure stigmata and ov...IR36 has been used as an indica tester in screeningWCVs.However,artificial emasculation is not on-ly a time consuming work,but also may producefalse hybrids due to incomplete emasculation,andmay injure stigmata and ovary which will result ina decrease of spikelet fertility.We studied the possi-展开更多
Background Well child visits(WCV)are fundamental to preventive primary care.We examined trends in WCV attendance during the COVID-19 pandemic and characterised variation by patient and provider characteristics.Methods...Background Well child visits(WCV)are fundamental to preventive primary care.We examined trends in WCV attendance during the COVID-19 pandemic and characterised variation by patient and provider characteristics.Methods Deidentified electronic medical records from two academic practice-based research networks in Ontario were used to create age-specific cohorts of children under age six attending WCVs from 2015 to 2022.Patients’residential postal codes were linked to neighbourhood-level measures to estimate socioeconomic status.Monthly visit rates were modelled using segmented linear regression with autoregressive residuals.Changes associated with COVID-19 were assessed using level change and trend change of monthly visit rates.Findings For the 53256 included children,WCV attendance increased from 2015 to 2020 for cohorts aged 15 months and younger and was stable for 18-month,2–3-year and 4–6-year visits.The COVID-19 pandemic was associated with decreased WCV attendance in all ages except ages 1–2 weeks,1 month,12 months,15 months and 18 months,in whom attendance was unchanged.The rate of change in WCV attendance rates pre-COVID-19 compared with post-COVID-19 was unchanged,with the exception of increased rate of change for the 1–2 weeks and 2–3 years old cohorts.Lower attendance rates were observed in children residing in neighbourhoods with the highest material deprivation,rural regions and those whose family physicians were men or older than 65 years.Interpretation Prepandemic gains in WCV attendance were stable or improved after the initial reductions observed at the pandemic onset,suggesting that WCVs were prioritised by family physicians and families.Targeted strategies are needed to improve WCV attendance for vulnerable groups.展开更多
文摘多图谱图像分割方法在处理医学器官分割中体现了更高的分割效率,但目前已有的多图谱分割方法主要存在两个问题:一是分割多个感兴趣区域(regions of interest,ROI)时,会出现错误分割和错误间隙等问题;二是在分割多目标ROI时,会大大增加分割时间。针对上述问题,改进图像融合算法,提出加权联合表决算法(weighted combine voting,WCV)。算法将所有的待分割目标作为参与共同表决的对象,将图谱图像与目标图像之间的相似系数(dice)作为“投票”权重,通过一次“投票”过程就可以分割出所有的待分割目标。方法在实验数据集上得到的整体分割结构相似性、单个器官ROI相似性系数分别为:整体97.11%,肺部78.57%,血池76.03%,心肌80.10%,相比现有多图谱分割方法取得了更高的准确性。实验结果表明该方法可以使器官分割具有较高的鲁棒性,对临床应用具有现实意义。
文摘IR36 has been used as an indica tester in screeningWCVs.However,artificial emasculation is not on-ly a time consuming work,but also may producefalse hybrids due to incomplete emasculation,andmay injure stigmata and ovary which will result ina decrease of spikelet fertility.We studied the possi-
文摘Background Well child visits(WCV)are fundamental to preventive primary care.We examined trends in WCV attendance during the COVID-19 pandemic and characterised variation by patient and provider characteristics.Methods Deidentified electronic medical records from two academic practice-based research networks in Ontario were used to create age-specific cohorts of children under age six attending WCVs from 2015 to 2022.Patients’residential postal codes were linked to neighbourhood-level measures to estimate socioeconomic status.Monthly visit rates were modelled using segmented linear regression with autoregressive residuals.Changes associated with COVID-19 were assessed using level change and trend change of monthly visit rates.Findings For the 53256 included children,WCV attendance increased from 2015 to 2020 for cohorts aged 15 months and younger and was stable for 18-month,2–3-year and 4–6-year visits.The COVID-19 pandemic was associated with decreased WCV attendance in all ages except ages 1–2 weeks,1 month,12 months,15 months and 18 months,in whom attendance was unchanged.The rate of change in WCV attendance rates pre-COVID-19 compared with post-COVID-19 was unchanged,with the exception of increased rate of change for the 1–2 weeks and 2–3 years old cohorts.Lower attendance rates were observed in children residing in neighbourhoods with the highest material deprivation,rural regions and those whose family physicians were men or older than 65 years.Interpretation Prepandemic gains in WCV attendance were stable or improved after the initial reductions observed at the pandemic onset,suggesting that WCVs were prioritised by family physicians and families.Targeted strategies are needed to improve WCV attendance for vulnerable groups.
