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Related Concept Videos

Imaging Studies IV: Magnetic Resonance Imaging01:27

Imaging Studies IV: Magnetic Resonance Imaging

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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,...
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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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The kidneys are two large bean-shaped organs located in the upper abdomen. They filter the blood several times a day to remove toxins and rebalance water and electrolytes of the circulatory system via the renal veins. The kidneys receive blood directly from the heart via the renal arteries. These arteries enter the kidney at the hilum, the concave surface of the bean, where they branch and divide into smaller vessels and capillaries.
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The kidneys are a pair of bean-shaped organs in the human body that play a critical role in maintaining overall health. They filter out waste products from the blood, regulate blood pressure, maintain electrolyte balance, and stimulate the production of red blood cells.
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Imaging Studies II: Ultrasonography01:24

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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...
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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...
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Kidney morphology in pregnancy using T2-weighted MRI.

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Maternal kidney size and volume during pregnancy fall within typical non-pregnant ranges, as shown by fetal MRI. However, renal pelvis diameter measurements are larger than previously reported with ultrasound.

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Area of Science:

  • Radiology
  • Obstetrics
  • Nephrology

Background:

  • Maternal kidney morphology changes during pregnancy.
  • Fetal magnetic resonance imaging (MRI) incidentally captures maternal kidneys.
  • Understanding these changes is crucial for accurate interpretation.

Purpose of the Study:

  • To characterize maternal kidney morphology using fetal MRI.
  • To establish reference ranges for kidney length, volume, and renal pelvis diameter.
  • To assess corticomedullary differentiation in pregnant women.

Main Methods:

  • Retrospective analysis of fetal MRI scans from 42 women.
  • Exclusion of women with chronic kidney disease or multiple gestations.
  • Independent duplicate measurements of kidney dimensions and corticomedullary differentiation.

Main Results:

  • Mean kidney lengths were 10.9 cm (left) and 10.4 cm (right), varying with height.
  • Mean maximal renal pelvis diameters were 9 mm (left) and 12 mm (right).
  • Renal volume was within non-pregnant ranges, influenced by height and gestational age.

Conclusions:

  • Maternal kidney length and volume are comparable to non-pregnant norms.
  • MRI reveals larger renal pelvis diameters than previously reported by ultrasound.
  • Findings have implications for standardized reporting of maternal kidney measurements.