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相关概念视频

Imaging Studies VI: Voiding Cystourethrography and Cystography01:22

Imaging Studies VI: Voiding Cystourethrography and Cystography

9
Voiding Cystourethrography (VCUG) and Cystography are specialized radiographic procedures used to examine the structure and function of the bladder and urethra.Voiding Cystourethrography (VCUG)A Voiding Cystourethrogram (VCUG) is a diagnostic imaging procedure that assesses the anatomy and function of the lower urinary tract. It focuses on the bladder, bladder neck, and urethra, helping detect abnormalities such as vesicoureteral reflux (VUR)—the backward or reverse flow of urine into the...
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Imaging Studies V: Intravenous Urography and Retrograde Pyelography01:22

Imaging Studies V: Intravenous Urography and Retrograde Pyelography

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IntroductionIntravenous Urography (IVU) and Retrograde Pyelography (RP) are important diagnostic imaging techniques used to evaluate the urinary system. These methods help identify structural abnormalities, obstructions, and functional issues in the kidneys, ureters, and bladder. Both procedures use iodine-based contrast media to enhance the visibility of urinary tract structures on X-ray images, though they differ in their methods and indications.1. Intravenous Urography (IVU)Intravenous...
36
Urodynamic Studies: Uroflowmetry01:19

Urodynamic Studies: Uroflowmetry

45
Uroflowmetry is a non-invasive urodynamic test designed to measure various aspects of urination, including volume, flow rate, and the time to void. This test is crucial for diagnosing and assessing conditions such as bladder outlet obstruction, bladder dysfunction, incomplete bladder emptying, incontinence, and urinary tract blockages caused by benign prostatic hyperplasia (BPH) and urethral strictures.Pre-Test Instructions:Before a uroflowmetry test, patients are typically advised to drink...
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Urinary Tract Calculi I: Introduction01:28

Urinary Tract Calculi I: Introduction

16
Renal calculi, or kidney stones, are solid deposits of minerals and salts formed inside the kidneys. In medical terminology, "calculus" refers to the stone itself, while "lithiasis" describes the process of stone formation. Depending on their location within the urinary system, these stones may be classified as either urolithiasis, when situated within the urinary tract, or nephrolithiasis, when located within the kidneys. Each term signifies the specific impact of the stone.Predisposition...
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Imaging Studies I: Kidney, Ureter, and Bladder Studies01:28

Imaging Studies I: Kidney, Ureter, and Bladder Studies

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Kidney, Ureter, and Bladder (KUB) StudiesKidney, Ureter, and Bladder (KUB) studies are standard diagnostic imaging procedures used to assess the anatomy of the urinary system. They are commonly utilized for patients experiencing abdominal pain or urinary symptoms. By using a simple X-ray of the abdomen, KUB studies can reveal structural and pathological abnormalities within the kidneys, ureters, and bladder. These studies are particularly valuable in diagnosing kidney stones, urinary...
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Urinary Tract Calculi III: Medical Management01:30

Urinary Tract Calculi III: Medical Management

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The diagnosis of renal calculi involves several imaging techniques, including non-contrast CT scans and ultrasound. These methods help visualize kidney stones, assess their size and location, and detect possible obstructions. Additionally, Measuring urine pH is useful for diagnosing specific stone types, such as struvite (alkaline pH) and uric acid stones (acidic pH). Cystine stones are primarily linked to cystinuria, a genetic condition. A urinalysis helps detect blood in the urine (hematuria)...
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相关实验视频

Updated: Jul 10, 2025

Supervised Machine Learning for Semi-Quantification of Extracellular DNA in Glomerulonephritis
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使用机器学习量化膀外逆流.

Saidul Kabir1, J L Pippi Salle2, Muhammad E H Chowdhury3

  • 1Department of Electrical and Electronic Engineering, University of Dhaka, Dhaka, 1000, Bangladesh.

Journal of pediatric urology
|November 18, 2023
PubMed
概括

一个机器学习模型准确地评分了尿管回流 (VCUG) 图像的尿管回流 (VUR). 这种客观的方法有助于确定VUR患者的临床过程和治疗.

关键词:
功能提取 功能提取机器学习是机器学习.膀外反流 (VUR) 是一种疾病.排空性囊回形图 (VCUG) 是一种

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科学领域:

  • 放射学 放射学是指放射学
  • 医疗成像医学成像
  • 机器学习 机器学习

背景情况:

  • 排空囊回形图 (VCUG) 的分级对于管理囊回流 (VUR) 至关重要.
  • 目前的VCUG图像评估是主观的,导致VUR评估中的潜在不一致性.
  • 需要对VUR进行客观分级,以规范患者护理.

研究的目的:

  • 开发和验证用于客观VCUG图像分级的监督机器学习模型.
  • 通过放射图像自动评估VUR严重程度.
  • 为了提高VUR诊断的准确性和一致性.

主要方法:

  • 一组113张VCUG图像的数据集进行了策划.
  • 专家儿科放射科医生和泌尿科医生对VUR的严重程度进行了分级,以确定基本事实.
  • 提取了九个图像特征,并用于训练六个具有交叉验证的机器学习模型.

主要成果:

  • 机器学习模型,特别是支持矢量机 (SVM) 和多层感知器 (MLP),实现了高精度.
  • 使用排名最高的功能,MLP的F1分数达到91.14%,SVM的90.27%.
  • 一个扭曲的囊模式被确定为高度VUR的关键预测因素.

结论:

  • 机器学习为从VCUG图像中客观VUR分级提供了一个有希望的途径.
  • 开发的模型在评估VUR严重程度方面表现出很高的准确性.
  • 未来对机器学习协议的改进可以进一步完善客观VUR分级.