摘要:

High resolution computed tomography (CT) is a noninvasive imaging modality that has been used extensively in evaluating diseases of the human lumbosacral spine. Excellent spatial and contrast resolution, combined with multiplanar reformatting capability make high resolution CT scanners well‐suited for similar applications in dogs. Consistently good quality images can be obtained when careful attention is given to factors affecting resolution. This paper reviews and illustrates some principles of high resolution CT, and proposes a technique for regional CT examination of the canine lumbosacral spin

ISSN:1058-8183    

DOI:10.1111/j.1740-8261.1994.tb02051.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

A thirteen year old neutered female Domestic Shorthair cat with oral squamous cell carcinoma was noted to have a cranial mediastinal mass on survey thoracic radiographs. Fluoroscopic aspiration was performed and cystic fluid was obtained which was clear colorless, and devoid of cells, with a specific gravity of 1.005 and protein<2.5 mg/dl. On postmortem examination, a unilocular cyst was identified originating from the external lateral surface of the cranial mediastinum. Histologically, the cyst lining was nonciliated and resembled mesothelium. These findings differentiate this cyst from previously reported branchial cysts in cats where the cysts were multiloculated, the cyst fluid was mucinous and cellular, and the cysts were lined by ciliated columnar epithelial cells.

ISSN:1058-8183    

DOI:10.1111/j.1740-8261.1994.tb02052.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

An 8‐year‐old cat was evaluated for recurrent bouts of stranguria, hematuria and pollakiuria. Routine urinalysis, CBC and serum chemistries were unremarkable. Intravenous excretory urography was performed while the cat was sedated. The nephrogram was initially well opacified and increased in opacity during the 40 minutes that the study was performed. Ureterogram and pyelogram failed to develop. Oliguria with little excretion of the contrast medium was documented. These findings are consistent with either contrast medium associated hypotension or acute renal failure. Treatment with aggressive fluid therapy and a continuous dobutamine infusion reestablished urine output after 2 ho

ISSN:1058-8183    

DOI:10.1111/j.1740-8261.1994.tb02053.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

The radiographic and pathologic findings of two Peruvian Paso foals with osteopetrosis are described. Both foals, one male and one female, presented with respiratory difficulty, brachygnathia and failure to rise after birth. Both foals were mildly anemic, hypogammaglobulinemic and had elevations in serum alkaline phosphatase. Increased medullary bone opacity was noted on radiographs of the extremities, spine and skull in both foals. A lack of normal cortical:medullary bone distinction was evident radiographically. The medullary primary spongiosa appeared to run in parallel columns away from the physes of all long bones and the vertebrae. This created a distinctive hour glass appearance to the osteopetrotic bones. One foal developed a bacterial pneumonia. Both foals were euthanized due to failure to thrive. Histopathology and electron microscopy documented these foals to have normal osteoclastic numbers but lack normal ruffled borders, lack of a clear zone and normal lysosomal numbers indicative of cellular dysfunction. These clinical, radiographic and pathologic findings are similar to the juvenile, lethal autosomal recessive form of osteopetrosis described in humans. Osteopetrosis has not been previously described in a female foal.

ISSN:1058-8183    

DOI:10.1111/j.1740-8261.1994.tb02054.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

Magnetic resonance images of a screech owl (Otus asio) were acquired to identify the normal anatomic components of the eye‘and orbit. T1‐weighted, proton‐density, and T2‐weighted images were obtained in the straight sagittal, oblique dorsal, and oblique sagittal planes. Signal intensity for the various orbital structures differed between the three resonance techniques. T1‐weighted images provided the best anatomic detail of ocular and orbital structures. The oblique dorsal and oblique sagittal planes were superior for evaluating the optic nerve in its

ISSN:1058-8183    

DOI:10.1111/j.1740-8261.1994.tb02055.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

Twelve foals with unusual sesamoid development were found in a population of 107 Thoroughbred foals (60 males, 47 females) over a three year period. Radiographic examination was done at 14 days of age and at 42 day intervals thereafter. The routine administration was of a dorsopalmar view of the proximal sesamoid bones in the left forelimb. Changes of the proximal sesamoid bones were found in 11% of the foals between 14 and 56 days of age. The change was a radiolucent line at the junction of the middle and proximal third of the sesamoid bone. Of those which were observed with sesamoid bone changes, 8 had a normal radiographic appearance at 60 days. In most foals at least 2 or 3 sesamoid bones of the forelegs were affected. In some only 1 sesamoid bone was affected. The changes did not correlate with a clinical joint disorder. However, females seemed to be affected more than males. This condition may be similar to bipartite sesamoid bones described by others and probably a manifestation of secondary ossification centers.

ISSN:1058-8183    

DOI:10.1111/j.1740-8261.1994.tb02056.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

Radiography and magnetic resonance imaging were used to evaluate osteoarthritis at 2, 6, and 12 weeks following transection of the cranial cruciate ligament of the stifle (femorotibial) joint of 6 dogs. A quantitative radiographic scoring system was used to assess the progression of hard and soft tissue changes of osteoarthritis. Mediolateral (flexed joint) and oblique (extended joint) radiographic projections enabled identification of small osteophytes on the femoral trochlear ridges, which were detected at an earlier stage of development than was previously reported. Magnetic resonance imaging was useful in detecting changes in cartilage thickness, osteophytosis and intraarticular loose bodies. Radiography and magnetic resonance imaging were complementary in the assessment of pathologic changes of osteoarthritis.

ISSN:1058-8183    

DOI:10.1111/j.1740-8261.1994.tb02057.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

The purpose of this study was to provide an anatomic reference for the channel catfish (Ictalurus punctatus) using xeroradiography*and conventional radiography. The entire body of three adult fish was radiographed using standard xeroradiographic and conventional radiographic techniques. Two xeroradiographs and their corresponding conventional radiographs were selected, and the xeroradiographs labeled to illustrate the normal skeletal and soft‐tissue anatomy of the channel catfis

ISSN:1058-8183    

DOI:10.1111/j.1740-8261.1994.tb02058.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

Historical, physical examination, clinicopathologic, radiographic and ultrasonographic findings of 13 dogs with gastrointestinal (GI) smooth muscle tumors (11 leiomyosarcomas, 2 leiomyomas) were reviewed. History, including signalment and chief complaint, physical examination and bloodwork were neither sensitive nor specific for GI neoplasia. Imaging procedures, radiology and ultrasonography, detected the presence of abdominal masses in 12 patients, including 9 animals lacking a palpable mass on initial examination. Survey radiographs of 10 of the 13 dogs revealed a mass effect in 5/10 dogs, evidence of peritoneal effusion or free abdominal gas in 3/10 dogs, and an obstructive pattern with gas and fluid distension of the intestinal tract in 1/10 dogs. Ultrasonography identified an abdominal mass in 12/13 dogs, and peritoneal effusion in 5 animals. Ultrasonography correctly recognized an association of the mass with bowel segments by the presence of intraluminal gas, within or adjacent to the mass effect, in 10 dogs, and strongly suggested an intestinal origin in one additional animal. GI smooth muscle tumors often appeared as large masses, eccentrically projecting from the bowel wall, frequently containing single or multiple hypo/anechoic regions. Based on this study we conclude that ultrasonography is more sensitive than survey radiography in the detection of GI smooth muscle tumors, and may present specific features to distinguish smooth muscle tumors from other types of GI tumors. Ultrasonography is recommended as a screening procedure for cases where GI neoplasia is suspected.

ISSN:1058-8183    

DOI:10.1111/j.1740-8261.1994.tb02059.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

ISSN:1058-8183    

DOI:10.1111/j.1740-8261.1994.tb02060.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY