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Acta veterinaria Scandinavica2019; 61(1); 62; doi: 10.1186/s13028-019-0495-8

Magnetic resonance imaging and computed tomography of equine cheek teeth and adjacent structures: comparative study of image quality in horses in vivo, post-mortem and frozen-thawed.

Abstract: The use of cadavers for radiology research methodologies involving subjective image quality evaluation of anatomical criteria is well-documented. The purpose of this method comparison study was to evaluate the image quality of dental and adjacent structures in computed tomography (CT) and high-field (3 T) magnetic resonance (MR) images in cadaveric heads, based on an objective four-point rating scale. Whilst CT is a well-established technique, MR imaging (MRI) is rarely used for equine dental diagnostics. The use of a grading system in this study allowed an objective assessment of CT and MRI advantages in portraying equine cheek teeth. As imaging is commonly performed with cadaveric or frozen and thawed heads for dental research investigations, the second objective was to quantify the impact of the specimens' conditions (in vivo, post-mortem, frozen-thawed) on the image quality in CT and MRI. Results: The CT and MR images of nine horses, focused on the maxillary premolar 08s and molar 09s, were acquired post-mortem (Group A). Three observers scored the dental and adjacent tissues. Results showed that MR sequences gave an excellent depiction of endo- and periodontal structures, whereas CT produced high-quality images of the hard tooth and bony tissues. Additional CT and MRI was performed in vivo (Group B) and frozen-thawed (Group C) in three of these nine horses to specify the condition of the best specimens for further research. Assessing the impact of the specimens' conditions on image quality, specific soft tissues of the maxillary 08s and 09s including adjacent structures (pulps, mucosa of the maxillary sinuses, periodontal ligament, soft tissue inside the infraorbital canal) were graded in group B and C and analysed for significant differences within CT and MR modalities in comparison to group A. Results showed that MRI scores in vivo were superior to the post-mortem and frozen-thawed condition. Conclusions: On comparing the imaging performance of CT and MRI, both techniques show a huge potential for application in equine dentistry. Further studies are needed to assess the clinical suitability of MRI. For further research investigations it must be considered, that the best MR image quality is provided in live horses.
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Publication Date: 2019-12-10 PubMed ID: 31823831PubMed Central: PMC6905104DOI: 10.1186/s13028-019-0495-8Google Scholar: Lookup
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  • Comparative Study
  • Journal Article

Summary

This research summary has been generated with artificial intelligence and may contain errors and omissions. Refer to the original study to confirm details provided. Submit correction.

This study compared the image quality of computed tomography (CT) and magnetic resonance (MR) imaging on equine teeth and adjacent structures under three conditions: live horses (in vivo), in post-mortem, and in frozen-thawed conditions. While MR imaging proved better for soft tissue structures, CT showed high-quality images of hard tooth and bony tissues, highlighting the potential of both techniques in equine dentistry.

Study Objective and Design

  • The primary objective of this research was to evaluate and compare the image quality deriving from CT scans and 3T MR imaging of equine teeth in various settings: in vivo (on live horses), post-mortem, and in a frozen-thawed state. The use of an objective four-point rating scale was used to evaluate and grade the quality of these images.
  • Specific focus was given to assessing the imaging of the maxillary premolar 08s and molar 09s, as well as their surrounding tissues.
  • The research also sought to ascertain the impact of the specimen’s condition (whether live, dead, or frozen-thawed) on the overall image quality.

Results

  • The study reveals that MR imaging provided excellent depiction of endodontic (inside the tooth) and periodontal (around the tooth) structures. CT scans meanwhile were particularly effective at producing high-quality images of the hard teeth and bony tissues.
  • In assessing the effects of the specimens’ conditions on image quality, live horses provided the best MR image quality compared to post-mortem and frozen-thawed conditions.
  • Three observers used an objective grading system to assess the quality of the images. This system provided a quantifiable and consistent assessment across all images and all states of the specimens.

Conclusions and Implications for Future Research

  • The comparisons made between CT scanning and MRI outcomes show that both techniques have tremendous potential in equine dentistry. However, the claim highlights the need for further studies to assess the clinical suitability of MR imaging in this area.
  • Additionally, the research stresses that for any future investigations, the optimal MR image quality is likely to be attained when the imaging is conducted on live horses.

Cite This Article

APA
Röttiger C, Hellige M, Ohnesorge B, Bienert-Zeit A. (2019). Magnetic resonance imaging and computed tomography of equine cheek teeth and adjacent structures: comparative study of image quality in horses in vivo, post-mortem and frozen-thawed. Acta Vet Scand, 61(1), 62. https://doi.org/10.1186/s13028-019-0495-8

Publication

Acta veterinaria Scandinavica
ISSN: 1751-0147
NlmUniqueID: 0370400
Country: England
Language: English
Volume: 61
Issue: 1
Pages: 62
PII: 62

Researcher Affiliations

Röttiger, Christin
  • Clinic for Horses, University of Veterinary Medicine Hannover, Foundation, Bünteweg 9, 30559, Hannover, Germany. Christin.Roettiger@tiho-hannover.de.
Hellige, Maren
  • Clinic for Horses, University of Veterinary Medicine Hannover, Foundation, Bünteweg 9, 30559, Hannover, Germany.
Ohnesorge, Bernhard
  • Clinic for Horses, University of Veterinary Medicine Hannover, Foundation, Bünteweg 9, 30559, Hannover, Germany.
Bienert-Zeit, Astrid
  • Clinic for Horses, University of Veterinary Medicine Hannover, Foundation, Bünteweg 9, 30559, Hannover, Germany.

MeSH Terms

  • Animals
  • Bicuspid / anatomy & histology
  • Cadaver
  • Female
  • Freezing
  • Horses / anatomy & histology
  • Magnetic Resonance Imaging / methods
  • Magnetic Resonance Imaging / veterinary
  • Male
  • Maxilla
  • Molar / anatomy & histology
  • Tomography, X-Ray Computed / methods
  • Tomography, X-Ray Computed / veterinary

Conflict of Interest Statement

The authors declare that they have no competing interests.

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Citations

This article has been cited 3 times.
  1. Erasha AM, Nazih M, Ali S, Alsafy M, El-Gendy S, Sayed RKA. Morphological and radiological mapping of dental cusps in relation to spatial constraints on tooth shape of one humped camel (Camelus dromedarius). Zoological Lett 2023 Jun 19;9(1):14.
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  2. Kutara K, Kadekaru S, Sugisawa R, Une Y. Pyogenic meningitis and trigeminal neuritis secondary to periodontogenic paranasal sinusitis in a red deer (Cervus elaphus). J Vet Med Sci 2021 Jun 9;83(6):947-951.
    doi: 10.1292/jvms.21-0029pubmed: 33840720google scholar: lookup
  3. Jabbary Aslany F, McBain K, Chen L, O'Brien J, Noel GPJC. Comparison between pre-mortem and post-mortem cadaveric images for use with augmented reality headsets during dissection. Surg Radiol Anat 2023 Oct;45(10):1311-1319.
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