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Related Concept Videos

Imaging Studies II: Ultrasonography01:24

Imaging Studies II: Ultrasonography

565
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...
565
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...
437

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Quantification of Kidney Inflammation Using Nanobubble-mediated Contrast Enhanced Ultrasound.

Niloufar Rostam Shirazi1,2,3, Xiaolin He3, Dana Dranka4

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This study introduces a novel contrast-enhanced ultrasound (CEUS) method using nanobubbles to non-invasively quantify kidney inflammation. This technique shows promise for monitoring kidney disease progression and reducing the need for biopsies.

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Area of Science:

  • Nephrology
  • Biomedical Imaging
  • Nanotechnology

Background:

  • Kidney inflammation drives acute kidney injury (AKI) and chronic kidney disease (CKD).
  • Non-invasive methods to quantify renal inflammation are limited, hindering clinical management.
  • Current diagnostics often rely on invasive procedures like renal biopsies.

Purpose of the Study:

  • To develop and validate a novel non-invasive imaging technique for quantifying kidney inflammation.
  • To utilize contrast-enhanced ultrasound (CEUS) with targeted nanobubbles (NBs) for real-time inflammation assessment.
  • To correlate imaging findings with established histological markers of kidney injury.

Main Methods:

  • A murine ischemia-reperfusion injury (IRI) model was used to induce kidney inflammation.
  • CEUS with Cy5-labeled nanobubbles (NBs) was employed for real-time imaging.
  • Parametric analyses (TTP, AUfC, DT) and histological/immunofluorescent assessments were performed.

Main Results:

  • CEUS imaging visualized inflammation-induced changes in kidney perfusion and vascular integrity.
  • Delayed time-to-peak (TTP) and increased area under the falling curve (AUfC) indicated impaired perfusion.
  • Prolonged decorrelation time (DT) suggested increased capillary permeability and NB extravasation.
  • Imaging metrics strongly correlated with histological evidence of tubular injury and neutrophil infiltration.

Conclusions:

  • CEUS with NBs offers a non-invasive, quantitative method for assessing kidney inflammation.
  • This technology provides an accessible tool for monitoring renal inflammation and disease progression.
  • The findings support a potential reduction in the reliance on invasive renal biopsies for diagnosis and monitoring.