Comparative Evaluation of the Ventricles in the Yorkshire Terrier and the German Shepherd Dog Using Low‐field Mri

Esteve-Ratsch, Barbara; Kneissl, Sibylle; Gabler, Cornelia

doi:10.1111/j.1740-8261.2001.tb00960.x

Cited by 36 publications

(56 citation statements)

References 9 publications

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“…Inducing a brain adaptation to the vault architecture required compression in the dorsoventral axis, thus increasing the difficulty of identifying different brain regional structures. According to Schroeder et al, [36] brachycephalic breeds have larger LVVs than dolichocephalic and mesocephalic breeds [36][37][38][39][40][41]. Based on our results, age appears to influence the LVV in a statistically significant way, which Sue et al also found [42].…”

Section: Discussionsupporting

confidence: 65%

Comparison between ultrasonography and computed tomography images for planning and neuronavigation in brain surgeries in dogs as an animal model

Carreira

Universitário²,

Ajuda³

2015

Glob Anesth Perioper Med

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Objectives: The brain's inner cavities containing cerebrospinal fluid are referred to as ventricles, which are easily identified in an ultrasonographic (US) image as hypoecogenic and in computed tomography (CT) as hypodense. Imaging has become essential to planning and neuronavigation in brain surgeries, serving to guide the surgeon through the organ. The study aimed to 1) compare ultrasonography (US) and computed tomography (CT) measurements of lateral ventricle volumes (LVV) in dogs to determine their level of agreement and 2) understand their influence on surgical planning and neuronavigation. Materials and methods:Measurements were taken from a sample of 24 LVVs from 12 brachycephalic dog cadavers. First, 2 mm slices of the dogs' brains were scanned with the CT machine. The US brain scan technique was performed using a transducer of 7.5 MHz over the brain after craniotomy placement. This procedure was useful in simulating the brain neuronavigation technique in a two-dimensional scenario. A P value less than 0.05 was defined as statistically significant. Results:A comparison of the US and CT images showing measurements of the right and left LVVs showed no statistically significant differences between the LVVs, allowing us to conclude that US is a reliable technique to planning and neuronavigation in brain surgeries. Conclusion:As a result US is of great value in the everyday practice and areas working with limited resources such as in veterinary medicine, or even in a zooubitquity context, since in some human's hospitals of developing countries or in some rural and remote areas, access to CT, magnetic resonance MR techniques, and neuronavigation systems are limited to point high-technology centers, unlike the sonography (US). Therefore, US it is a reliable technique to planning and neuronavigation in brain surgeries, thus promoting patient safety and surgeon success.

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Section: Discussionsupporting

confidence: 65%

Comparison between ultrasonography and computed tomography images for planning and neuronavigation in brain surgeries in dogs as an animal model

Carreira

Universitário²,

Ajuda³

2015

Glob Anesth Perioper Med

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“…A sagittal view (T1-weighted image: spin echo, TR: 650 ms, TE: 35 ms) of a Yorkshire terrier brain. Transverse images with no gap and 6-8 slices were scanned in this indicated range adult beagles (Vullo et al, 1997;Esteve-Ratsch et al, 2001). Depending on the shape of the canine head, the main anatomical differences affect brain shape, weight and size, including the size of the ventricles.…”

mentioning

confidence: 99%

“…Murata et al (1981) and Vullo et al (1997) have described variations in brain shape, weight, and size but these parameters were not the subject of previous studies. However, enlargement of ventricles and asymmetry have been frequently observed in toy-breed dogs, independent of the head shape (Kii et al, 1997, Esteve-Ratsch et al, 2001.…”

mentioning

confidence: 99%

Quantitative analysis of hydrocephalic ventricular alterations in Yorkshire terriers using magnetic resonance imaging

Woo¹,

Choi²,

Nam³

et al. 2010

Vet. Med. - Czech

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ABSTRACT:The purpose of this work was to evaluate hydrocephalic ventricular changes using three quantitative analysis methods. The height, area and volume of the ventricles and brain were measured in 20 Yorkshire terriers (10 normal and 10 hydrocephalic dogs) using low-field MR imaging (at 0.2 Tesla). All measurements were averaged and the relative ventricle size was defined as a percentage (percent size of the ventricle/size of the brain). The difference between normal and hydrocephalic dogs was statistically significant for the average of each ventricle as well as for the percentage value. Five hydrocephalic symptoms were identified: circling, head tilting, seizures, ataxia, and strabismus. With respect to height, area and volume of the brain/ventricle, the difference between normal and hydrocephalic dogs was not significant. The ventricle/brain with height (1D) was related to the area (2D) and volume (3D). The correlations with area and volume were as good as the ventricle/brain height ratio in the case of hydrocephalic dogs. Therefore, one-, two-and three-dimensional quantitative methods may be complementary. We expect that the stage of hydrocephalic symptoms can be classified if statistical significance for ventricular size among symptoms is determined with the analysis of a large number of hydrocephalic cases.

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“…In several studies of dogs, ventricular dilations were measured based on ventricular height, area and volume (De Hann et al 1994;Kii et al 1997;Vite et al 1997;Vullo et al 1997;Esteve-Ratsch et al 2001;Woo et al 2010;Pivetta et al 2013). All three measurement methods have statistical significance.…”

Section: Discussionmentioning

confidence: 99%

“…The results of MRI examinations evaluating ventriculomegaly or hydrocephalus in animals have been discussed in several studies (Kii et al 1997;Vite et al 1997;Vullo et al 1997;Kii et al 1998;Esteve-Ratsch et al 2001;Nykamp et al 2001;Woo et al 2010;Pivetta et al 2013). Most studies were performed on dog breeds predisposed to ventriculomegaly, whereas cats have never been subjected to MRI exams.…”

mentioning

confidence: 99%

Diagnosis of cerebral ventriculomegaly in felines using 0.25 Tesla and 3 Tesla magnetic resonance imaging

Przyborowska¹,

Adamiak²,

Holak³

et al. 2018

Vet. Med. - Czech

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Twenty European shorthair cats with neurological disorders, aged 1-3 years and with body weights of 2.6-4.05 kg, were studied in low-field and high-field magnetic resonance imaging systems. Aims of the study were to evaluate the dilation of lateral ventricles in the examined population of cats with the use of quantitative analysis methods and to identify any differences in the results of low-and high-field magnetic resonance imaging. The average brain height was determined to 27.3 mm, and the average volume of the brain was 10 699.7 mm 3 . Moderately enlarged ventricles were observed in 16 symptomatic cats. Moderate unilateral enlargement was observed in one cat. Mild ventricular asymmetry was described in four animals. The average difference in ventricular height between measurements obtained in low-and high-field magnetic resonance imaging was 0.37 ± 0.16% and for ventricular volume it was 0.62 ± 0.29%. The magnetic resonance imaging scan did not reveal statistically significant differences in brain height or volume between healthy and cats with ventriculomegaly. The differences in the results of low-and high-field magnetic resonance imaging were not statistically significant. Described findings could facilitate the interpretation of magnetic resonance images in cats with ventriculomegaly or hydrocephalus.

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Comparative Evaluation of the Ventricles in the Yorkshire Terrier and the German Shepherd Dog Using Low‐field Mri

Cited by 36 publications

References 9 publications

Comparison between ultrasonography and computed tomography images for planning and neuronavigation in brain surgeries in dogs as an animal model

Comparison between ultrasonography and computed tomography images for planning and neuronavigation in brain surgeries in dogs as an animal model

Quantitative analysis of hydrocephalic ventricular alterations in Yorkshire terriers using magnetic resonance imaging

Diagnosis of cerebral ventriculomegaly in felines using 0.25 Tesla and 3 Tesla magnetic resonance imaging

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