摘要:

The lumbosacral spine of six normal dogs weighing 4.5 to 24.5kg was imaged by computed tomography in 5.0 mm&10.0 mm transverse planes. The vertebral canal and thecal sac (including emerging nerve roots not distinguished as separate structures from the spinal cord) were measured along dorsoventral and transverse dimensions at cranial, middle and caudal levels within each vertebra from transverse tomographic images. Linear measurements were standardized to the dorsoventral dimension of the L6vertebral midbody to permit comparison and averaging of the vertebral and thecal sac dimensions among different sized dogs. The dorsoventral and transverse vertebral canal size progressively increased from cranial to caudal within each vertebra from L1−L6(p ≤ 0.05). The transverse dimension of the thecal sac image increased caudally within each vertebra from L1−L4(p ≤ 0.05). The vertebral canal dorsoventral and transverse dimensions were largest in the midlumbar area (p ≤ 0.05). The transverse, but not the dorsoventral, imaged dimension of the thecal sac peaked in the L4vertebra (p ≤ 0.05). The dorsoventral thecal sac image was observed to fill the vertebral canal in the cranial and middle vertebral levels in vertebrae L1through L5in over 60% of these normal dogs. However, epidural fat could almost always be seen lateral to the thecal sac regardless of what lumbar vertebra or vertebral level was imaged. Cranial to the lumbosacral junction, the dorsal intervertebral disk margin was almost always concave relative to the thecal sac. However, at the L7‐S1junction, some dogs had flat or even slightly convex dorsal intervertebral disk margins. The dorsal and ventral longitudinal ligaments and the ligamentum flavum could not be identified as distinct structures on the 5.0 mm transverse tomog

ISSN:1058-8183    

DOI:10.1111/j.1740-8261.1996.tb01250.x

出版商:Blackwell Publishing Ltd    

年代:1996

数据来源: WILEY

摘要:

A technique for intraoral radiography of the maxillary cheek teeth in large animals using strips of nonscreen and commercial dental x‐ray film is described. The method was initially tested using horse cadaver heads and subsequently on three large animal patients with signs of dental disease. Limitations of the described technique include necessity for general anesthesia, special x‐ray film and manual developing. Additionally, the need for very accurate adjustment of incident beam angle, beam centering point and depth in the oral cavity provide a major technical challenge. After becoming famillar with the technique, the major limitation was increased time for manual film developing. The images provided by nonscreen technique were subjectively superior. The anatomic detail of the apical and periodontal regions of the teeth was better than on survey radiographs. Nonscreen intraoral technique should be considered for anesthetized large animal patients with signs of dental dise

ISSN:1058-8183    

DOI:10.1111/j.1740-8261.1996.tb01251.x

出版商:Blackwell Publishing Ltd    

年代:1996

数据来源: WILEY

ISSN:1058-8183    

DOI:10.1111/j.1740-8261.1996.tb01252.x

出版商:Blackwell Publishing Ltd    

年代:1996

数据来源: WILEY

摘要:

In radiographs of a domestic short haired cat of unknown age, mineralization was identified in the pulmonary parenchyma, peripheral pulmonary vessels, the aortic outflow tract, aortic valve, celiac artery, cranial mesenteric artery, and the internal and external iliac arteries. The diffuse arterial mineralization was characterized histopathologically as arteriosclerosis. This is the first report of mineralized arteriosclerosis in a cat with corresponding radiographic signs. The arteriosclerosis is thought to be due to systemic hypertension but a definitive cause for the profound mineralization was not found. Causes of soft tissue mineralization are reviewed.

ISSN:1058-8183    

DOI:10.1111/j.1740-8261.1996.tb01253.x

出版商:Blackwell Publishing Ltd    

年代:1996

数据来源: WILEY

摘要:

Two dogs with neurologic signs were evaluated by magnetic resonance imaging of the brain. Focal space‐occupying lesions were present in both dogs. In the first, the lesion was in the brain stem and in the second, in the cerebellum. In one dog the lesion was only evident after administration of gadolinium‐DTPA‐dimeglumine. Based on the magnetic resonance images, neoplasia was suspected in both dogs but histopathologically, granulomatous meningoencephalomyelitis was diag

ISSN:1058-8183    

DOI:10.1111/j.1740-8261.1996.tb01254.x

出版商:Blackwell Publishing Ltd    

年代:1996

数据来源: WILEY

ISSN:1058-8183    

DOI:10.1111/j.1740-8261.1996.tb01255.x

出版商:Blackwell Publishing Ltd    

年代:1996

数据来源: WILEY

摘要:

The technical feasibility of performing magnetic resonance imaging (MRI) in domestic pigeons was investigated. Imaging was performed with a 1.5 Tesla magnet using a human knee surface coil. The head and coelomic cavity of isoflurane‐anesthetized birds were imaged in the dorsal, sagittal, and transverse planes to produce T1‐weighted, T2‐weighted, and contrast‐enhanced T1‐weighted images. The birds were then euthanatized, formalin perfused, frozen, and sectioned in the corresponding anatomic planes. The anatomy defined by MRI was correlated with gross anatomic sections made from the same birds. The following CNS structures were identified: cerebral hemispheres, cerebellum, optic chiasm, optic lobes, brain stem, and cranial spinal cord. The cornea, lens, and vitreous were also well differentiated in dorsal section MRI's. The abdominal organs identified included proventriculus, ventriculus, intestines, cloaca, liver, kidneys, spleen, testes, and ovary. The hepatic and renal vasculature were wel

ISSN:1058-8183    

DOI:10.1111/j.1740-8261.1996.tb01256.x

出版商:Blackwell Publishing Ltd    

年代:1996

数据来源: WILEY

ISSN:1058-8183    

DOI:10.1111/j.1740-8261.1996.tb01257.x

出版商:Blackwell Publishing Ltd    

年代:1996

数据来源: WILEY

摘要:

The adrenal glands of 20 normal ferrets were imaged with ultrasound. Of the forty glands, only 4 (three right and one left) could not be clearly identified. Mean (±standard deviation) dimensions of the right (7.6 ± 1.8 mm length by 2.6 ± 0.4 mm width) and left (7.2 ± 1.8 mm length by 2.8 ± 0.5 mm width) glands were similar. Both adrenal glands were wider (p<0.05) sonographically in males than females. Measured length and width of the right gland positively correlated (p<0.05) with body weight. The glands had a hypoechoic outer zone and hyperechoic central region, were elongate to avoid in shape and located medial and, variably, at the level of the cranial pole of the ipsilateral kidney. This study demonstrates that normal adrenal glands can be imaged in fer

ISSN:1058-8183    

DOI:10.1111/j.1740-8261.1996.tb01258.x

出版商:Blackwell Publishing Ltd    

年代:1996

数据来源: WILEY

ISSN:1058-8183    

DOI:10.1111/j.1740-8261.1996.tb01259.x

出版商:Blackwell Publishing Ltd    

年代:1996

数据来源: WILEY