摘要:

Conventional water‐soluble iodine‐containing contrast media such as salts of diatrizoic and iothalamic acids dissociate in solution resulting in preparations which are very high in osmolality. Intravascular or intrathecal injections of these compounds therefore represent severe physicochemical insult to the body, with many associated side effects. Contrast media with lower osmolalities have been produced in two ways: first by producing compounds which do not dissociate in solution (metrizamide, and more recently iopamidol and iohexol), and second by creating dimers (ioxaglate). These media provide significant clinical advantages over the conventional, hyperosmolar media. A new class of nonionizing dimers with even lower osmolalities are currently being investigated. This paper reviews the development of the low osmolar media, their advantages, and their use in medical and veterinary radiol

ISSN:0196-3627    

DOI:10.1111/j.1740-8261.1989.tb00746.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY

摘要:

Midline or lateral craniotomies were made in the skull of six normal dogs to allow ultrasound examination of the brain. The purposes of the study were (1) to describe the normal sonographic anatomy of the canine brain and (2) to develop the use of burr hole as research tool to allow sonographic examination of the canine brain. The sonographic appearance of the falx cerebri, splenial sulci, cingulate gyrus, callosal sulci, lateral ventricles, third ventricle, caudate nuclei, thalamus, hippocampus, cerebellum, and osseous tento‐rium were described. Results of this study suggest that the surgical creation of cranial defect is safe, reliable, and effective in providing window for ultrasound observation. The anatomic description should also allow recognition of sonographic abnormalities in the brain of dogs with persistent fontanelle

ISSN:0196-3627    

DOI:10.1111/j.1740-8261.1989.tb00747.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY

摘要:

This study was undertaken to design protocol for use of radioaerosol of technetium‐99m‐labeled diethylenetriaminepentacetic acid (99mTc‐DTPA) for ventilation imaging as clinical tool in the dog and to evaluate imaging characteristics in both normal dogs and dogs with simulated pulmonary embolism. Clearance of the 99mTc‐DTPA radioaerosol from the lung was also evaluated. Six normal dogs were used in two phases: (1) as their own controls and (2) during pulmonary artery occlusion using Swan‐Ganz catheter. Radioaerosol ventilation images were obtained and rate of clearance from normal and occluded lungs determined. Perfusion studies using technetium‐99m‐macroaggregated albumin (99mTc‐MAA) immediately followed. Clearance half‐times (T1/2) were found to be significantly increased (p<0.05) in acutely occluded lungs; however, the small magnitude of this change was visually difficult to detect on the ventilation images. Good quality initial ventilation and perfusion images were obtained and provided ready evaluation of ventilation (V), perfusion (Q), and induced V/Q mismatches. A clinical case of pulmonary thromboembolic disease was also evaluated with diagnostic result, indicating that this method of V/Q scintigraphy can provide useful information in those clinical cases in which pulmonary thromboembo

ISSN:0196-3627    

DOI:10.1111/j.1740-8261.1989.tb00748.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY

摘要:

A method of negative contrast peritoneography using CO2peritoneal insufflation technique was investigated in adult horses. Radiographic visualization of anatomic structures in the dorsal abdomen, including the kidneys, portions of the spleen and liver, dorsal stomach and mesenteric root region, was enhanced. Visualization of ventral abdominal structures was not enhanced. Negative contrast peritoneography allowed reduction in the radiographic technique from 140 kVp and 40 mAs before insufflation to 100 kVp and 5–10 mAs following insufflation. The technique was easily and safely performed with minimal patient discomfort and ris

ISSN:0196-3627    

DOI:10.1111/j.1740-8261.1989.tb00749.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY

摘要:

Urograms were performed on 16 adult koalas to evaluate this procedure for use in the koala. Because there is only small amount of intraabdominal fat, radiographs of the abdomen of koalas lack detail. Contrast medium was excreted more slowly in the koala than in the dog and there was considerable variation in the rate of excretion between koalas. The results of this study indicated that urography was valuable technique for assessing renal anatomy, but there was considerable variation in the time for excretion of the contrast medium.

ISSN:0196-3627    

DOI:10.1111/j.1740-8261.1989.tb00750.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY

摘要:

The clinical, radiographic, and sonographic signs in three dogs with splenic torsion are presented. AH dogs exhibited weight loss, anorexia, and lethargy. Splenomegaly was consistent radiographic finding in two dogs and large ill‐defined midabdominal mass was seen in one dog. The spleen was easily imaged sonographically in all dogs. Splenic sonography in two dogs showed diffuse, hypoechoic pattern consistent with splenic congestion. Hilar splenic vessels were enlarged on the sonograms of two dog

ISSN:0196-3627    

DOI:10.1111/j.1740-8261.1989.tb00751.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY

ISSN:0196-3627    

DOI:10.1111/j.1740-8261.1989.tb00752.x

出版商:Blackwell Publishing Ltd    

年代:1989

数据来源: WILEY