Evaluation of Total Lung Volume and Density using Multi-Detector Computed Tomography in Normal Dogs

최호정,이기자,최수영,이정우,한우석,이인,권영항,이영원 한국임상수의학회 2011 한국임상수의학회지 Vol.28 No.5

This study was performed to quantitatively assess the normal lung volume and density according to the position by multi-detector computed tomography (MDCT) in dogs. Helical CT of the thorax was performed on 4 different positions with dorsal, left lateral, right lateral and ventral recumbency in 6 Pekingese and 6 Maltese dogs. During CT scanning, dogs were kept hyperventilated. Through the 3-dimensional reconstruction of CT images, the lung parameters were measured as the volume and density of the left, right including accessory lobe, and total lung. 3D images represented the different lung shape between Pekingese and Maltese dogs. Their difference of total lung volume and total lung density was not significant on the each position in both breeds. Right lung volume was significantly higher than left. The difference of left and right volume was 66.91 ± 25.1 ml. Linear relationship was shown between body weight and lung volume of ventral recumbency position. The dependent lung had higher density and lower volume than nondependent lung in both breed dogs. The volume of nondependent lung was not changed compared with the volume on ventral or dorsal recumbency. The total lung volume measured with MDCT is correlated with the lung density, and the lung density is useful to predict the normal total lung volume.

Evaluation of Inflammatory Disease in the Nasal Cavity and Paranasal Sinuses using CT in Dogs and Cats

최호정,이기자,박성준,정성목,송근호,이영원 한국임상수의학회 2010 한국임상수의학회지 Vol.27 No.1

Inflammatory sinonasal disease was diagnosed in five dogs and two cats with clinical signs of nasal discharge and epistaxis. Survey radiography and CT were performed in all of patients. CT scan of the rostral cranium was performed with a thickness of 2 or 5 mm. Nasal cytology and culture from nasal smear were performed immediately after CT examination. Remarkable increase of opacity in the nasal cavities and frontal sinuses was observed in only 3 cases. On CT images, the cavitating lesions were isodense in nasal cavity (7 cases), frontal sinuses (3 cases), and nasopharynx (2 cases) with destruction of the nasal septum (4 cases), maxillary turbinates (5 cases), maxilla (3 cases),and hard palate (3 cases). The lesions were enhanced after intravenous contrast administration in 5 cases and were not enhanced in 2 cases. Inflammatory cells were observed in nasal cytology. Most of the cultures from nasal smear were bacteria. CT is useful to diagnose sinonasal disease and is more accurate in demonstrating the extent and character of lesions of nasal cavity than radiography.

개에서 발생한 연부조직 섬유종 2례

최호정,이정우,안지영,오이세,안세준,정성목,박성준,조성환,이영원 한국임상수의학회 2008 한국임상수의학회지 Vol.25 No.5

A 10-year-old castrated male Schnauzer (case 1) and a 13-year-old intact male Schnauzer (case 2) was referred with mass of left hind limb. We performed hemogram, serum chemistry, radiography, ultrasonography, computed tomography, fine needle aspiration and histopathology. The complete blood counts and serum biochemistry results were within the reference range. Radiography showed cutaneous mass with soft tissue density. The lesions of two dogs were revealed a definite marginated hyperechoic mass with vascularization in ultrasonography. Computed tomography showed an isodense mass in the left hind limb region with minimal contrast enhancing in case 1 and heterogenous enhancement in case 2. Cytology from ultrasonographic guided aspiration of the mass was suspected fibrous tissue-derived benign cell in two dogs. A surgical excision was performed in two dogs. In histological examination of the resected mass, cutaneous fibroma was revealed. The two patients were successfully treated by surgery and postoperative care. This report decribes and compares radiographic, ultrasonographic, computed tomographic, cytologic and histopathologic features of the cutaneous fibroma of two schnauzer dogs.

개에서 농흉증의 영상의학적 접근

최호정,이영원,박기태,왕지환,김영기,연성찬,이효종,이희천 한국임상수의학회 2010 한국임상수의학회지 Vol.27 No.1

A 3-years-old female Pointer was evaluated for anorexia, dyspnea and exercise intolerance for 10 days. Auscultation revealed muffling of heart sound. There were leukocytosis, anemia, hypoalbuminaemia and hyperglobulinaemia on the blood profiles. Radiography showed severe pleural effusion. Thorax ultrasonographs described traped pleural effusion, pericardial effusion and collapsed right lung lobe(s). On CT images, thoracic neoplasia and lung torsion were ruled-out. Thoracocentesis with thoracoscopy and bacterial culture revealed pyothorax and pleuritis. The diagnosis of pyothorax in dogs and cats is based on clinical signs, radiography, thoracocentesis and cytology and culture of the exudate. In this case, various diagnostic medical imaging techniques (radiography, ultrasonography, CT and thoracoscopy) were used for diagnosis of pyothorax.

Urethroperineal Fistula Associated with a Severe Ulcerative Dermatosis in a Puppy

최호정,이영원,연성찬,이효종,이희천 한국임상수의학회 2009 한국임상수의학회지 Vol.26 No.1

40-day-old mixed male puppy was presented with a 10-day history of tenesmus and extensive ulcerative lesion of perineum. At physical examination, the dog was voiding mainly from an orifice in the perineal fistula. On fistulogram, a urethroperineal fistula was diagnosed. The dog was treated by wet dressing for wound management and antibiotics for 4weeks. Subsequently, the patient improved and no complication or recurrence was presented.

개에서 정상 비장크기의 방사선학적 계측

최호정,이영원,이경우,왕지환,·정인조,연성찬,이효종,이희천 한국임상수의학회 2007 한국임상수의학회지 Vol.24 No.4

개에서 발생한 비전형적 부신피질선종 1례

최호정,주보나,안지영,오이세,정성목,박성준,조성환,이영원 한국임상수의학회 2009 한국임상수의학회지 Vol.26 No.1

A 15-year-old, spayed female maltese dog was presented with polydipsia, polyuria, polyphagia, abdominal distention, alopecia and hyperpigmentation. The complete blood counts were in normal range, and the serum biochemistry revealed elevated level of glucose and globulin. Mild hepatomegaly was seen on radiography of abdomen. Abdominal ultrasonography revealed the uniformly enlarged left adrenal gland measured 2.4 cm in diameter. ACTH stimulation test and LDDST revealed hyperadrenocorticism. HDDST revealed pituitary dependent hyperadrenocorticism. On CT images, isodense mass with contrast enhancing was seen in left adrenal gland. Cytologic result is consistent with benign tumor. Adrenal mass was surgically removed and evaluated. Histopathologic examination revealed adenocortical adenoma.

개에서 심실중격결손의 영상의학적 진단 2례

최호정,이영원,왕지환,박기태,연성찬,이효종,이희천 한국임상수의학회 2008 한국임상수의학회지 Vol.25 No.5

Ventricular septal defects (VSDs) is an opening in the ventricular septum that allows blood to flow between the ventricles. Most ventricular septal defects are located in the upper ventricular septum and can be identified by auscultation. In this report, 2 dogs with heart murmur were diagnosed as VSD using radiography and echocardiography. In radiographs, bulging sign of the main pulmonary artery or the enlargement of the left ventricle was observed. The color Doppler examination showed the left-to-right shunting of blood via interventricular septal defect.

Intra-abdominal Retained Surgical Gauze in Two Dogs

최호정,이기자,오이세,이재연,지현철,박성준,정성목,이영원 한국임상수의학회 2007 한국임상수의학회지 Vol.24 No.2

This report describes the retained surgical gauze in two dogs that had ovariohysterectomy previously. Theical gauze in two dogs was 30 and 16 months, respectively.Radiographic signs included localized abdominal mas (case 1, 2) and soft tisue swelling (case 2). Retained surgicalgauze was imaged by survey radiography, ultrasonography and computed tomography (CT). Ultrasonography revealeda hypoechoic mass with irregular hyperechoic center in case 1, and hypoechoic mass with oval hyperechoic centerand acoustic shadowing in case 2. In CT examination of case 2, hyperdense mas with a thick peripheral rim enhancingin contrast study was shown. Cytologic examination of both cases revealed abscess and granuloma respectively. Thesurgical gauze should be considered in animals with ahistory of previous surgery with abnormal mas.

Radiographic Evaluation of Small Intestinal Diameter in Small Breed Dogs

최호정,김수찬,이영원 한국임상수의학회 2012 한국임상수의학회지 Vol.29 No.5

The purpose of the present study was to prove our empirical tendency of relatively high small intestinal diameter (SI) to fifth lumbar vertebral height (L5) ratio, which has been used in dogs. In this study, the ratio of SI/L5 was determined in small breed dogs weighing less than 5 kg. In addition, the effect of large volume of contrast media on the intestinal dilation was determined by performing upper gastrointestinal contrast study. Abdominal radiography and upper gastrointestinal series were performed in twelve healthy dogs weighing less than 5 kg. Small intestinal diameter (SI), fifth lumbar vertebral height (L5), and twelveth rib diameter were measured on abdominal radiographs. The range of values of SI/L5 is from 1.03 to 2.26 in plain radiography, and from 1.55 to 2.5 in contrast studies. Contrast agent significantly increased small intestinal diameter, and could be considered as mildly dilated intestinal model. Therefore, a value of 2.1 for SI/L5 is recommended as the upper limit of the normal range suggesting nonobstructive intestinal dilation.