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Related Concept Videos

Tooth Anatomy01:21

Tooth Anatomy

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The human tooth enables us to eat a variety of foods, speak clearly, and even aid in shaping our faces. Teeth are composed of various elements that work together. Here's a detailed look at the anatomy of a human tooth.
The Crown, Neck, and Root
The visible part of the tooth is referred to as the crown. It's covered by enamel, the hardest substance in the human body. The crown is uniquely shaped for each type of tooth, allowing for different functions such as cutting, tearing, or...
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Imaging Studies VII: Vascular Imaging01:19

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DefinitionRenal angiography, also known as renal arteriography, is an imaging technique used to obtain a comprehensive view of blood flow and the vascular structure of blood vessels in the kidneys and surrounding areas.PurposeRenal angiography detects blood vessel abnormalities in the kidneys, such as aneurysms, stenosis, thrombosis, vascular tumors, and renal artery stenosis. It evaluates kidney function and guides interventional treatments like angioplasty or stent placement.Pre-Procedure...
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Imaging Studies II: Ultrasonography01:24

Imaging Studies II: Ultrasonography

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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 I: Kidney, Ureter, and Bladder Studies01:28

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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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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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Imaging Studies for Cardiovascular System V: CT01:28

Imaging Studies for Cardiovascular System V: CT

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Cardiac computed tomography (CT) scanning is an advanced cardiac imaging technique that utilizes CT technology, with or without intravenous (IV) contrast, to produce accurate cross-sectional virtual slices of specific areas of the heart, coronary circulation, and major blood vessels such as the aorta, pulmonary veins, and arteries. The computer processes these slices to generate three-dimensional images. Multidetector CT (MDCT) is a rapid form of CT scanning that captures multiple slices...
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Related Experiment Video

Updated: Jan 21, 2026

Sampling and Pretreatment of Tooth Enamel Carbonate for Stable Carbon and Oxygen Isotope Analysis
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Improving 3D photogrammetry models through spectral imaging: Tooth enamel as a case study.

Aurore Mathys1,2, Patrick Semal2, Jonathan Brecko1,2

  • 1Biological Collection and Data Management, Royal Museum for Central Africa, Tervuren, Belgium.

Plos One
|August 14, 2019
PubMed
Summary
This summary is machine-generated.

Spectral photogrammetry using ultraviolet wavelengths significantly improves 3D model accuracy for challenging materials like tooth enamel. This technique offers a non-destructive solution for digitizing delicate museum objects.

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Area of Science:

  • * Digital imaging and 3D modeling
  • * Materials science and optical properties

Background:

  • * Digitizing reflective or translucent materials in 3D presents significant challenges.
  • * Museum objects are often too fragile or valuable for surface treatments like matt coating.
  • * Alternative non-destructive 3D digitization methods are essential.

Purpose of the Study:

  • * To evaluate spectral photogrammetry as a viable solution for 3D digitization of challenging materials.
  • * To assess the impact of different wavelengths on the accuracy of 3D models of tooth enamel.

Main Methods:

  • * Six sets of teeth were photographed using spectral photogrammetry at various wavelengths.
  • * Analysis focused on the quality and accuracy of the resulting 3D models.

Main Results:

  • * 3D model quality for tooth enamel improved significantly when using ultraviolet wavelengths.
  • * Photogrammetry performed with red and infrared spectrum resulted in less accurate models.
  • * Observed differences correlate with the known optical properties of enamel.

Conclusions:

  • * Spectral photogrammetry, particularly with ultraviolet light, enhances 3D digitization of challenging materials.
  • * Understanding a material's optical properties is crucial for selecting optimal wavelengths for accurate 3D reconstruction.
  • * This method provides a promising non-invasive approach for digitizing delicate and valuable artifacts.