计算扩散权重成像在膀成像报告和膀癌数据系统评估中的应用
Minglei Zhang1, Chen Chen1, Xinyi Zeng1
1Department of Radiology, Jiangsu Province Hospital, Nanjing, China.
Abdominal radiology (New York)
|December 27, 2025
概括
计算机扩散权重成像 (cDWI) 提供了可比的诊断准确度,以获得DWI (aDWI) 膀癌分期使用VI-RADS系统. 这种节省时间的MRI技术提高了病变的清晰度,尽管信号噪声比较低,但它仍然是一个可行的替代方案.
科学领域:
- 放射学 放射学是一门学科.
- 在瘤学瘤学.
- 医疗成像医学成像
背景情况:
- 膀癌的诊断依赖于MRI,而VI-RADS得分对于分期至关重要.
- 传统的高b值DWI面临着诸如低SNR和运动文物等挑战.
- 计算DWI (cDWI) 为提高效率和图像质量提供了一个潜在的解决方案.
研究的目的:
- 验证cDWI作为aDWI的时间效率高的替代品,用于膀癌中的VI-RADS评估.
- 为了比较cDWI和aDWI的诊断准确度和图像质量.
- 解决传统DWI中SNR和运动工件的局限性.
主要方法:
- 对110名患有尿路细胞癌的患者进行了回顾性研究,这些患者接受了3.0T的MRI.
- 从较低的b值获取 (b=0/700 s/mm2) 计算生成的cDWI图像.
- 两个放射科医生对aDWI和cDWI进行VI-RADS评分的独立评估,与组织病理学进行比较.
主要成果:
- cDWI在b=2000s/mm2显著改善了对比率和主观损伤清晰度.
- 与aDWI相比,cDWI在所有b值和读数上显示较低的SNR和CNR.
- 在cDWI和aDWI之间检测肌肉侵入的AUC没有显著差异.
结论:
- 在VI-RADS评估中,cDWI的诊断准确度与aDWI相比相当.
- cDWI在高b值时提高了病变清晰度,支持其在膀癌MRI中的作用.
- 尽管目标SNR/CNR较低,但cDWI是膀癌分期的有希望的时间效率替代方案.
相关概念视频
Imaging Studies VI: Voiding Cystourethrography and Cystography
1.1K
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...
1.1K
Imaging Studies III: Computed Tomography
251
DefinitionComputed Tomography (CT) of the genitourinary (GU) tract is a non-invasive imaging modality that utilizes X-rays and computer processing to generate detailed cross-sectional images of the urinary system, encompassing the kidneys, ureters, bladder, and adjacent structures such as the adrenal glands.PurposeCT scans of the GU tract serve several diagnostic and therapeutic purposes, including:Diagnosis of Urinary Tract Diseases: Detects kidney stones, tumors, cysts, and congenital...
251
Imaging Studies I: Kidney, Ureter, and Bladder Studies
234
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...
234
Imaging Studies V: Intravenous Urography and Retrograde Pyelography
965
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...
965
Imaging Studies IV: Magnetic Resonance Imaging
212
Introduction:Magnetic Resonance Imaging, or MRI, can include a specialized imaging technique of the urinary system known as Magnetic Resonance Urography (MRU). This radiation-free technique uses strong magnetic fields and radio waves to produce detailed images with the help of a computer. MRU is particularly effective for visualizing fluid-filled structures like the kidneys, ureters, and bladder.Applications of MRI in the Genitourinary SystemKidneys and Ureters: MRI detects tumors, cysts,...
212
Imaging Studies II: Ultrasonography
314
IntroductionUltrasonography, or renal ultrasound, is a noninvasive medical imaging technique that uses high-frequency sound waves to visualize the kidneys, ureters, bladder, and surrounding tissues.Indications for Urinary System UltrasonographyUrinary system ultrasonography is indicated in various clinical scenarios, such as:Kidney Stones (Urolithiasis): To detect and monitor the size and presence of kidney or urinary tract stones.Hydronephrosis: To assess the dilation of the renal pelvis and...
314


