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Related Concept Videos

Computed Tomography01:10

Computed Tomography

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...
Imaging Studies III: Computed Tomography01:27

Imaging Studies III: Computed Tomography

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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Ocular biometry in rabbits using computed tomography.

Nicholas Goody1, Nicolas Israeliantz1, Azzurra Massidda2

  • 1Royal (Dick) School of Veterinary Studies, Hospital for Small Animals, The University of Edinburgh, Midlothian, UK.

Veterinary Ophthalmology
|March 12, 2024
PubMed
Summary
This summary is machine-generated.

This study established reference ranges for ocular biometry in domestic rabbits using computed tomography (CT). These measurements aid in detecting eye diseases affecting ocular structures in rabbits.

Keywords:
attenuationdimensionsexoticlensreference rangevitreous chamber

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Area of Science:

  • Veterinary Ophthalmology
  • Comparative Anatomy
  • Medical Imaging

Background:

  • Ocular biometry is crucial for diagnosing ophthalmic conditions in animals.
  • Establishing reference ranges for domestic rabbits (Oryctolagus cuniculus) is essential for accurate diagnosis.
  • Computed tomography (CT) offers a non-invasive method for detailed anatomical assessment.

Purpose of the Study:

  • To develop a repeatable method for measuring ocular structures in rabbits.
  • To establish normative ocular biometry reference ranges in adult domestic rabbits.
  • To utilize a 64-slice multidetector computed tomography (CT) scanner for precise measurements.

Main Methods:

  • A retrospective and observational anatomic study was conducted on 100 eyes from 50 healthy adult rabbits.
  • Three-dimensional multiplanar reconstruction from CT scans was used to measure globe dimensions (length, width, height).
  • Measurements included lens and chamber dimensions, as well as lens and vitreous chamber attenuation, compared against demographic data.

Main Results:

  • Reference ranges were established: globe width (18.03 ± 0.81 mm), height (17.18 ± 0.69 mm), and length (16.64 ± 0.66 mm).
  • Increased rabbit weight correlated with larger globe dimensions (height, length, width).
  • Advanced age was associated with increased lens attenuation and transverse lens width, with excellent inter- and intra-observer agreement.

Conclusions:

  • CT is a reliable modality for measuring ocular biometry dimensions in rabbits.
  • The established reference values are valuable for identifying diseases impacting ocular structures in rabbits over 18 months of age.
  • This study provides a foundation for future research in rabbit ophthalmology.