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Related Concept Videos

Computed Tomography01:10

Computed Tomography

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Tomography refers to imaging by sections. Computed tomography (CT) is a non-invasive imaging technique that uses computers to analyze several cross-sectional X-rays to reveal minute details about structures in the body.
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...
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Imaging Studies III: Computed Tomography01:27

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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...
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Design Example: Traverse Angle Computations01:25

Design Example: Traverse Angle Computations

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Traverse angle computations are a critical component of surveying, used to compute the internal angles within a closed traverse. A traverse consists of a series of connected lines forming a closed loop, often used for land boundary delineation or mapping. Calculating the internal angles ensures accuracy in the traverse geometry and is essential for checking survey data integrity.The process begins with known azimuths and bearings of the traverse sides. Internal angles at each vertex are...
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Area Computation by the Alternative Coordinate Method01:24

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The alternative coordinate method, also known as the Shoelace Formula, is a technique for determining the area of a traverse using Cartesian coordinates. This method relies on the sequential arrangement of x and y coordinates for each point of the shape, ensuring accuracy and ease of application.In this approach, each corner's x and y coordinates are listed as fractions, with the x-coordinate as the numerator and the y-coordinate as the denominator. These coordinates are arranged sequentially...
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Positron Emission Tomography01:29

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Positron emission tomography (PET) is a medical imaging technique involving radiopharmaceuticals — substances that emit short-lived radiation. Although the first PET scanner was introduced in 1961, it took 15 more years before radiopharmaceuticals were combined with the technique and revolutionized its potential.
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The Role of Ion Channels in Neuronal Computation01:19

The Role of Ion Channels in Neuronal Computation

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A postsynaptic neuron usually receives numerous impulses from several other presynaptic neurons. The axon hillock of the postsynaptic neuron integrates all these signals and determines the likelihood of firing an action potential.
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Computed Tomography Colonography: Pearls and Pitfalls.

David H Kim1, Courtney C Moreno2, Perry J Pickhardt1

  • 1Department of Radiology, University of Wisconsin School of Medicine and Public Health, E3/311 Clinical Science Center, 600 Highland Avenue, Madison, WI 53792-3252, USA.

Radiologic Clinics of North America
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This guide optimizes computed tomography colonography (CTC) for detecting colorectal neoplasia. It details specific protocols and interpretation strategies to improve diagnostic accuracy and avoid common pitfalls.

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Area of Science:

  • Medical imaging
  • Gastroenterology
  • Oncology

Background:

  • Colorectal cancer is a significant health concern.
  • Early detection of colorectal neoplasia improves patient outcomes.
  • Computed tomography colonography (CTC) is an effective screening tool.

Purpose of the Study:

  • To provide a practical reference for optimizing CTC performance.
  • To detail specific protocols and interpretation strategies for CTC.
  • To highlight clinical pearls and potential pitfalls in CTC for colorectal neoplasia detection.

Main Methods:

  • Description of a specific CTC protocol used at two US university programs.
  • Outline of defined interpretation strategies for CTC.
  • Focus on practical aspects and clinical experience.

Main Results:

  • The article provides a framework for enhancing CTC performance.
  • It identifies key strategies for accurate interpretation.
  • It addresses common challenges and offers solutions.

Conclusions:

  • Optimized CTC protocols and interpretation strategies can improve the detection of colorectal neoplasia.
  • Awareness of clinical pearls and pitfalls is crucial for successful CTC implementation.
  • This reference aims to enhance the diagnostic utility of CTC in clinical practice.