Magnetic resonance imaging and computed tomography as tools for the investigation of sperm whale (Physeter macrocephalus) teeth and eye
Abstract Background Scanning techniques such as magnetic resonance imaging (MRI) and computed tomography (CT) are useful tools in veterinary and human medicine. Here we demonstrate the usefulness of these techniques in the study of the anatomy of wild marine mammals as part of a necropsy. MRI and CT...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
BMC
2017-06-01
|
| Series: | Acta Veterinaria Scandinavica |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1186/s13028-017-0307-y |
| _version_ | 1811280886183755776 |
|---|---|
| author | Aage Kristian Olsen Alstrup Ole Lajord Munk Trine Hammer Jensen Lasse Fast Jensen Abdi Hedayat Brian Hansen |
| author_facet | Aage Kristian Olsen Alstrup Ole Lajord Munk Trine Hammer Jensen Lasse Fast Jensen Abdi Hedayat Brian Hansen |
| author_sort | Aage Kristian Olsen Alstrup |
| collection | DOAJ |
| description | Abstract Background Scanning techniques such as magnetic resonance imaging (MRI) and computed tomography (CT) are useful tools in veterinary and human medicine. Here we demonstrate the usefulness of these techniques in the study of the anatomy of wild marine mammals as part of a necropsy. MRI and CT scans of sperm whale teeth (n = 4) were performed. The methods were compared and further compared to current standard methods for evaluation of tooth layering. For MRI a zero echo time sequence was used, as previously done for imaging of intact human teeth. For CT two different clinical scanners were used. Results The three scanners did not provide sufficient information to allow age estimation, but both MRI and CT provided anatomical information about the tooth cortex and medulla without the need for sectioning the teeth. MRI scanning was also employed for visualizing the vascularization of an intact eye from one of the stranded sperm whale. Conclusions Clearly, MRI was useful for investigation of the retinal vasculation, but optimum results would require well-preserved tissue. It was not possible to estimate age based on CT scans of tooth growth lines. Further research is needed to clarify the usability of MRI and CT as tools for marine mammal research when samples need to remain intact or when a spatial (three dimensional) arrangement of features needs to be determined. |
| first_indexed | 2024-04-13T01:22:45Z |
| format | Article |
| id | doaj.art-f79eacb9c0684e2895c40e7a82ead777 |
| institution | Directory Open Access Journal |
| issn | 1751-0147 |
| language | English |
| last_indexed | 2024-04-13T01:22:45Z |
| publishDate | 2017-06-01 |
| publisher | BMC |
| record_format | Article |
| series | Acta Veterinaria Scandinavica |
| spelling | doaj.art-f79eacb9c0684e2895c40e7a82ead7772022-12-22T03:08:43ZengBMCActa Veterinaria Scandinavica1751-01472017-06-015911810.1186/s13028-017-0307-yMagnetic resonance imaging and computed tomography as tools for the investigation of sperm whale (Physeter macrocephalus) teeth and eyeAage Kristian Olsen Alstrup0Ole Lajord Munk1Trine Hammer Jensen2Lasse Fast Jensen3Abdi Hedayat4Brian Hansen5Department of Nuclear Medicine and PET Center, Institute of Clinical Medicine, Aarhus University HospitalDepartment of Nuclear Medicine and PET Center, Institute of Clinical Medicine, Aarhus University HospitalDepartment of Chemistry and Bioscience, Aalborg University/Aalborg ZooFisheries and Maritime MuseumNatural History Museum of Denmark, University of CopenhagenCenter of Functionally Integrative Neuroscience, Aarhus University HospitalAbstract Background Scanning techniques such as magnetic resonance imaging (MRI) and computed tomography (CT) are useful tools in veterinary and human medicine. Here we demonstrate the usefulness of these techniques in the study of the anatomy of wild marine mammals as part of a necropsy. MRI and CT scans of sperm whale teeth (n = 4) were performed. The methods were compared and further compared to current standard methods for evaluation of tooth layering. For MRI a zero echo time sequence was used, as previously done for imaging of intact human teeth. For CT two different clinical scanners were used. Results The three scanners did not provide sufficient information to allow age estimation, but both MRI and CT provided anatomical information about the tooth cortex and medulla without the need for sectioning the teeth. MRI scanning was also employed for visualizing the vascularization of an intact eye from one of the stranded sperm whale. Conclusions Clearly, MRI was useful for investigation of the retinal vasculation, but optimum results would require well-preserved tissue. It was not possible to estimate age based on CT scans of tooth growth lines. Further research is needed to clarify the usability of MRI and CT as tools for marine mammal research when samples need to remain intact or when a spatial (three dimensional) arrangement of features needs to be determined.http://link.springer.com/article/10.1186/s13028-017-0307-yImaging techniquesComputer tomographyMagnetic resonanceSperm whalesEyesTeeth |
| spellingShingle | Aage Kristian Olsen Alstrup Ole Lajord Munk Trine Hammer Jensen Lasse Fast Jensen Abdi Hedayat Brian Hansen Magnetic resonance imaging and computed tomography as tools for the investigation of sperm whale (Physeter macrocephalus) teeth and eye Acta Veterinaria Scandinavica Imaging techniques Computer tomography Magnetic resonance Sperm whales Eyes Teeth |
| title | Magnetic resonance imaging and computed tomography as tools for the investigation of sperm whale (Physeter macrocephalus) teeth and eye |
| title_full | Magnetic resonance imaging and computed tomography as tools for the investigation of sperm whale (Physeter macrocephalus) teeth and eye |
| title_fullStr | Magnetic resonance imaging and computed tomography as tools for the investigation of sperm whale (Physeter macrocephalus) teeth and eye |
| title_full_unstemmed | Magnetic resonance imaging and computed tomography as tools for the investigation of sperm whale (Physeter macrocephalus) teeth and eye |
| title_short | Magnetic resonance imaging and computed tomography as tools for the investigation of sperm whale (Physeter macrocephalus) teeth and eye |
| title_sort | magnetic resonance imaging and computed tomography as tools for the investigation of sperm whale physeter macrocephalus teeth and eye |
| topic | Imaging techniques Computer tomography Magnetic resonance Sperm whales Eyes Teeth |
| url | http://link.springer.com/article/10.1186/s13028-017-0307-y |
| work_keys_str_mv | AT aagekristianolsenalstrup magneticresonanceimagingandcomputedtomographyastoolsfortheinvestigationofspermwhalephysetermacrocephalusteethandeye AT olelajordmunk magneticresonanceimagingandcomputedtomographyastoolsfortheinvestigationofspermwhalephysetermacrocephalusteethandeye AT trinehammerjensen magneticresonanceimagingandcomputedtomographyastoolsfortheinvestigationofspermwhalephysetermacrocephalusteethandeye AT lassefastjensen magneticresonanceimagingandcomputedtomographyastoolsfortheinvestigationofspermwhalephysetermacrocephalusteethandeye AT abdihedayat magneticresonanceimagingandcomputedtomographyastoolsfortheinvestigationofspermwhalephysetermacrocephalusteethandeye AT brianhansen magneticresonanceimagingandcomputedtomographyastoolsfortheinvestigationofspermwhalephysetermacrocephalusteethandeye |