Voiding Imaging
Voiding Imaging - Related Videos
01:22
Imaging Studies VI: Voiding Cystourethrography and Cystography
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2025
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...
01:12
Total Voids in Concrete
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2024
Total voids in concrete encompass gel water volume, capillary pores, and entrapped air. Gel water (retained within the cement hydration products) and physically entrapped or adsorbed water are significant for the hydration process. For complete hydration, it's estimated that the space needed for the products of a cubic centimeter of cement doubles. Capillary pores constitute the unoccupied space within the hydrated cement paste, with their size largely influenced by the water-to-cement ratio...
06:39
Real-Time Void Spot Assay
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Cited by 14 •
2023
This article describes a new method to study mouse voiding behavior by incorporating video monitoring in the conventional void spot assay. This approach provides temporal, spatial, and volumetric information on the voiding events and details of mouse behavior during the light and dark phases of the day.
07:46
Optical Materialography Part 2: Image Analysis
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2023
Source: Faisal Alamgir, School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA The imaging of microscopic structures of solid materials, and the analysis of the structural components imaged, is known as materialography. Often, we would like to quantify the internal three-dimensional microstructure of a material using only the structural features evidenced by an exposed two-dimensional surface. While X-ray based tomographical methods can reveal buried...
06:57
Theoretical Calculation and Experimental Verification for Dislocation Reduction in Germanium Epitaxial Layers with Semicylindrical Voids on Silicon
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2020
Theoretical calculation and experimental verification are proposed for a reduction of threading dislocation (TD) density in germanium epitaxial layers with semicylindrical voids on silicon. Calculations based on the interaction of TDs and surface via image force, TD measurements, and transmission electron microscope observations of TDs are presented.
FAQs
Its value comes from recording the urinary tract during changing conditions rather than examining anatomy at rest. As the bladder fills and empties, fluoroscopic images show how contrast moves through the bladder and urethra. This dynamic view can connect an observed structural finding with impaired emptying, reflux toward the kidneys, or obstruction during urination.
Contrast moving backward from the bladder toward the kidneys demonstrates urinary reflux. This finding provides information about abnormal flow direction that may not be apparent from symptoms or a static anatomical assessment alone. In clinical evaluation, documenting reflux helps explain certain urinary tract concerns and supports decisions about diagnosis, treatment planning, or follow-up.
The study follows contrast while the bladder empties, allowing clinicians to assess the performance of urination as well as the tract's structure. Difficulty emptying may indicate a functional problem, whereas a narrowed or blocked urethral passage may suggest obstruction. Observing these events together helps relate symptoms or clinical concerns to a specific anatomical or functional abnormality.
A typical examination introduces contrast material into the bladder, obtains fluoroscopic images as the bladder fills, and continues imaging while the patient urinates. The resulting sequence is reviewed for contrast reflux toward the kidneys, incomplete emptying, or urethral obstruction. Because the images capture several phases, the examination evaluates both urinary tract anatomy and changing function.
Clinicians may consider this approach when recurrent urinary tract infections, urinary difficulties, congenital abnormalities, or postoperative concerns require assessment of the lower urinary tract during urination. It is especially relevant in pediatric and urologic care, where identifying reflux, obstruction, or impaired emptying can help determine the next diagnostic or management step.
Findings can help clinicians determine whether a patient's concern relates to reflux, impaired bladder emptying, urethral obstruction, or another structural or functional abnormality visible during the study. That information supports diagnosis and treatment planning, while comparison during follow-up can help assess ongoing postoperative or urologic concerns and reduce reliance on unnecessary invasive testing.