Magnetic resonance imaging, computed tomography, and cross-sectional views of the anatomy of normal nasal cavities and paranasal sinuses in mesaticephalic dogs

Rycke, Lieve M. De; Saunders, Jimmy; Gielen, Ingrid; Bree, H. van; Simoens, Paul

doi:10.2460/ajvr.2003.64.1093

Cited by 46 publications

(71 citation statements)

References 22 publications

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“…2,11,12 Comparative anatomical studies using gross, CT, or MR images (or a combination) have been conducted in dogs, cats, rabbits, and horses. 1,4,6,14,17,18,26 Similar studies do not appear to have been published in ferrets although, as in the koala, cryptococcal granulomas and rhinitis have also been reported in this species. 16,28 There are no studies where MR images have been correlated to normal macroscopic anatomy or CT images in koalas.…”

Section: Introductionmentioning

confidence: 49%

“…The ventral conchal scrolls of dogs and cats are overdeveloped when compared to the simple ventral conchae of koalas, and there are no conchal sinuses in dogs. 6,8,14 Koalas are more similar to horses and rabbits; all three share the presence of conchal sinuses. In horses and rabbits, this structure is divided into a dorsal conchal sinus and a ventral conchal sinus, while in koalas it remains a single structure.…”

Section: Discussionmentioning

confidence: 92%

“…The dorsal conchae are almost parallel to the nasal septum and remain in the uppermost region of the nasal cavity, and there is a thin dorsal meatus between the septum and the dorsal conchae (Figs. [6][7][8][9]. The ventral conchae originate from the lateral aspect of the nasal cavity, and their attachment to the maxillary bones runs dorsally from rostral to caudal (Figs.…”

Section: Nasal Cavitymentioning

confidence: 99%

“…CT was deemed superior to MRI for detection of cortical bone lesions surrounding the nasal cavity and the frontal bone in the dog with nasal aspergillosis as well as being less expensive and having a faster examination time. 6,10,19,20 On the other hand, MRI was deemed superior to CT, where soft tissue involvement was suspected, due to its inherent superior contrast resolution. 4,5,10 Both modalities provide important tools to investigate disease of the nasal cavities and paranasal sinuses because bony and soft tissues are equally important components of these structures.…”

Section: Introductionmentioning

confidence: 98%

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COMPUTED TOMOGRAPHY AND MAGNETIC RESONANCE FOR THE ADVANCED IMAGING OF THE NORMAL NASAL CAVITY AND PARANASAL SINUSES OF THE KOALA (PHASCOLARCTOS CINEREUS)

Bercier¹,

Alexander²,

Gorow³

et al. 2014

Journal of Zoo and Wildlife Medicine

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The objective of this study is to describe computed tomography (CT) and magnetic resonance (MR) for the cross-sectional imaging of the normal anatomy of the nasal cavity and paranasal sinuses of the koala (Phascolarctos cinereus), to provide reference figures for gross anatomy with corresponding CT and MR images and to compare the features of the nasal cavity and paranasal sinuses of the normal koala with that reported in other domestic species. Advanced imaging can be used to aid in diagnosis, to plan surgical intervention, and to monitor therapeutic responses to diseases of the nasal passages in koalas. One clinically normal koala was anesthetized twice for the separate acquisition of dorsal CT scan images and transverse, dorsal, and sagittal MR images of its nasal cavity and paranasal sinuses. Sagittal and transverse CT planes were reformatted. Three fresh koala skulls were also transected in one of each transverse, sagittal, and dorsal planes and photographed. The CT and MR images obtained were matched with corresponding gross anatomic images and the normal bone, tissues and airway passages were identified. All anatomic structures were readily identifiable on CT, magnetic resonance imaging (MRI), and gross images. CT and MRI are both valuable diagnostic tools for imaging the nasal cavities and paranasal sinuses of koalas. Images obtained from this project can be used as baseline references for future comparison with diseased koalas to help with diagnosis, surgical intervention, and response to therapy.

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Section: Introductionmentioning

confidence: 49%

Section: Discussionmentioning

confidence: 92%

Section: Nasal Cavitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

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COMPUTED TOMOGRAPHY AND MAGNETIC RESONANCE FOR THE ADVANCED IMAGING OF THE NORMAL NASAL CAVITY AND PARANASAL SINUSES OF THE KOALA (PHASCOLARCTOS CINEREUS)

Bercier¹,

Alexander²,

Gorow³

et al. 2014

Journal of Zoo and Wildlife Medicine

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“…1989, Assheuer & Sager 1997), do olho e da órbita (Morgan et al 1994), dos linfonodos da cabeça e pescoço (Kneissl & Probst, 2006), das cavidades nasais e seios paranasais (De Rycke et al 2003), e da laringe (Vázquez et al 1998), entre outros. Foram também estudados o cérebro de gatos (Hudson et al 1995) e de cavalos (Arencibia et al 2001, Chaffin et al 1997.…”

Section: Introductionunclassified

Imagem por ressonância magnética na investigação da cabeça de cães

et al. 2010

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ABSTRACT.-Hage M.C.F.N.S., Iwasaki M., Rabbani S.R., Kamikawa L., Cervantes H.J.R., Bombonato P.P., Sterman F. Magnetic resonance imaging (MRI) is the most sensitive method of diagnostic imaging to evaluate soft tissues, specially the brain, however it is expensive. The method is based on the nuclear magnetic resonance phenomenon that occurs when atomic nucleus with magnetic proprieties in the body are submitted to a strong magnetic field, and excited with radio frequency generating a radio frequency signal captured by a receptive antenna. The signal is processed by Fourier Transform for the image formation. This study had the objective to obtain 10 complete exams of heads in cadavers of normal dogs to MRI and to make an Atlas of head structures. The images were obtained with a magnetic resonance unit Gyroscan S15/HP Philips using a magnetic field of 1,5Tesla. The cadavers were positioned with the head into a human head coil and submitted to sagittal slices used to plan transverse and dorsal slices in T1, T2 and DP spin-echo sequences. In T1 we adjusted TR=400ms and TE=30ms, in T2 TR=2000ms and TE=80ms and in DP TR=2000ms and TE=30ms. The slice thickness was 4mm, the number of averages 2, the matrix 256x256, the factor 1,0 and the field of view 14cm. The duration of the complete exam of the head was 74,5minutes. The images obtained with the described sequences and with the human head coil was of good quality. In T1 fat was hyperintense and fluid was hypointense. In T2 fat was less hyperintense and fluid was hyperintense. The cortical bone and the air were hypointense in all sequences used because of the low proton density. The DP sequence showed the best contrast between white and gray matter when compared with T2 and T1 sequences. Distinction of cerebral sulcus and gyrus was possible because T2 showed the cerebrospinal fluid. The identification of bone structures that compound the region, muscles, main venous and arterial vessels and structures of the central nervous system, besides elements of the digestory and respiratory systems and structures of the eyes among others was possible through contrast obtained with MRI. In this study the MRI acquired in T1, DP and T2 were complementary for the anatomic study of the head and been able to demonstrate the structures of the canine head with rich anatomic details. The time used to 1 Recebido em 29 de novembro de 2009. Aceito para publicação em 24 de fevereiro de 2010.

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Head—Non‐CNS

Gavin¹,

Holmes²

2009

Practical Small Animal MRI

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Magnetic resonance imaging, computed tomography, and cross-sectional views of the anatomy of normal nasal cavities and paranasal sinuses in mesaticephalic dogs

Abstract: CT and MRI provide a means for consistent evaluation of all structures of the nasal cavities and frontal sinuses. Both techniques could be useful for evaluation of diseases that affect the nasal region.

Cited by 46 publications

References 22 publications

COMPUTED TOMOGRAPHY AND MAGNETIC RESONANCE FOR THE ADVANCED IMAGING OF THE NORMAL NASAL CAVITY AND PARANASAL SINUSES OF THE KOALA (PHASCOLARCTOS CINEREUS)

COMPUTED TOMOGRAPHY AND MAGNETIC RESONANCE FOR THE ADVANCED IMAGING OF THE NORMAL NASAL CAVITY AND PARANASAL SINUSES OF THE KOALA (PHASCOLARCTOS CINEREUS)

Imagem por ressonância magnética na investigação da cabeça de cães

Head—Non‐CNS

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