Showing papers in "Journal of the Korean Society of Radiology in 1994"

Sonourethrography in the Evaluation of Anterior Urethral Strictures

Abstract: Purpose: To determine the reliability of sonourethrography (SUG) in the evaluation of male anterior urethral strictures. Materials and Methods: Both SUG with retrograde saline infusion and retrograde urethrography (RUG) were performed in 5young normal volunteers and 20 patients with symptoms of impaired urine flow. Those findings were compared with u rethroscopic and operative fi nd ings in a 11 patients. Results: SUG was more accurate in the evaluation of the stricture length and degree than R UG in 7 patients with anterior urethral strictures, when compared with their subsequent open urethroplasty findings. Only SUG could classify the degree of spongiofibrosis surrounding the strictures in 15 patients. So, SUG was diagnostically as efficacious as or, superior to, RUG in all 20 patients. Conclusion: SUG can be used as one of complementary and reliable tools for diagnosis, evaluation and follow-up of anterior urethral strictures.

Imaging Diagnosis of Breast Tuberculosis

Abstract: Purpose: To evaluate the radiologic findings of breast tuberculosis. Materials and Methods: The authors evaluated the radiologic findings of five cases of surgically confirmed tuberculosis of the breast. Patients were examined with mammography (n=5), ultrasonography (n=3), and MRI (n=2). AII patients were female. Four patients had unilateral lesion and the remaining one patient had bilateral breasttuberculosis. Results: Mammographic findings were mainly radioopaque mass density without secondary signs. Two patients showed secondary signs such as skin thickening, parenchymal distortion, and nipple retraction. Ultrasonographic findings were variable but helpful in differentiating benign from malignant breast lesions. MRI findings were more helpful in differentiating abscess from malignant lesions. Conclusion: Radiologic findings were usef비 to diagnose tuberculosis of the breast, but fine needle aspiration biopsy and culture were needed for suspicious radiologic findings.

Bronchiectasis in diffuse panbronchiolitis: High resolution CT assessment

Abstract: Purpose: To evaluate the characteristics of the bronchiectasis in diffuse panbronchiolitis using HRCT. Materials and Methods: We retrospectively studied 12 H RCT scans and two bronchography of 12 patients with diffuse panbronchiolitis(DPB). According t。 Akira et a l., DPB was classified into four types: small nodules around the end of bronchovascular branchings(CT type 1), small nodules in the centrilobular area connected with small branching linear opacities(CT type 11). nodules accompanied by ring -shaped or small ductal opacities connected to proximal bronchovascular bundles(CT type 111). large cystic opacities accompanied by dilated proximal bronch i( CT type IV). We compared the type and the extent of bronchiectasis, CTtypes of DPB , and pulmonary function test. Results: Bronchiectasis was defined in 12 cases with the tubular type predominantly involving small and medium -sized bronchi. These bronchiectasis involved the proximal bronchi of the centrilobular lesions of DPB. Among eight cases of advanced DPB(CT type 111 & IV) which extended to both upper lobes, seven showed tu bu lar bronchiectasis at the same area. Cystic bronchiectasis was shown in eight cases predominantly involving right middle lobe(n=7) . There was no linear correlation between the values of p비 mona ry function test and CT types of DPB . Conclusion: Characteristic feature of the bronchiectasis in DPB is the tubular ectasis predominantly involving the small and medium -sized bronchi.DPB with associated tubular bronchiectasis can involve whole lung field in advanced cases. HRCT is useful not only to depictthe findings of DPB but also to demonstrate the extent of lesion.

CT and MR Findings of Cavernous Sinus Lesionst

Abstract: PURPOSE : To classify the cavernous sinus lesions, to describe their radiologlcal findings, and to assess the usefulness of MR compared to CT.MATERIALS AND METHODS : Foully-five patients with lesions involving the cavernous sinus proved by histological and/or clinical and imaging methods were studied retrospectively and classified into neoplastic, vascular, and inflammatory lesions. CT and MR findings were compared in 21 patients evaluated by both modalities simultaneously according to these 4categories.RESULTS : Pitiutary macroadenoma was the most common cavernous sinus lesion(42%) . Diffuse convex bulging of the lateral wall of cavernous sinus was the most frequent radiological finding (84%), and the others were encasement of the cavernous carotid artery(49%), remodelling of the surrounding bones(44%), and complete obliteration of Meckel's cave(38%), in descending order of frequency. Bulging of the lateral wall of cavernous sinus was equally well demonstrated on both modalities, but encasement or displacement of the cavernous carotid artery and complete or partial obliteration of Meckel's cave were much better delineated on MR than on CT with the ratio of 3.8: 1 and 4.6: 1, respectively. Only bone changes were much better demonstrated on CT than on MR with the ratio of 3.8 : 1.CONCLUSION : MR is superior to CT in demonstrating the cavernous carotid artery encasement and obliteration of Meckel's cave, but CT is much better than MR in demonstrating bone changes.

Magnetic Resonence Imaging of Anomalous Pulmonary Venous Connections

Abstract: Purpose: We evaluated the capability of MR in the diagnosis of anomalous pulmona ry venous connection (APVC). Materials and Methods : The patient groupconsisted of11 total APVC and 8 partial APVC diagnosed with MR. Echocardiography was performed in all cases , cardiac angiography in 12 cases and operation in 12 cases. We compared MR findings with those of operation , echocardiography and cardiac angiography. Results: In surgically proven 12 cases, diagnostic accuracy of preoperative MR, echocardiography and cardiac angiography was 100%, 67% and 63%, respectively. In the remaining cases, MR findings well correlated with those of echocardiography or cardiac angiography. Stenosis of common p비monary vein or superior vena cava was identified in 4 cases. In one patient, MR deplcted associated cor triatriatum clearly. Conclusion: MR is an effective modallty in depicting anomalous pulmonaryvenous connections.

An Intrapulmonary Cystic Teratoma: As a Cavitary Lung Lesion

Abstract: We report a rare cause of lung cavities, occurring in a patient with intrapulmonary cystic teratoma. Computed tomography (CT) provided us more detailed informations about the tumor characteristics containing fat and calcification, which could not be distinguished on the plain radiographs.ln addition, CTscans clearly demonstrated the dilated anterior segmental bronchus of the left upper lobe entering the posterior aspect ofthe cavity.

Ultrasonographic Evaluation of Fibroadenoma in the Breast: Primary Signs of Mass

Abstract: PURPOSE : To evaluate the ultrasonomammographic findings of breast fibroadenoma .METHODS AND MATERIALS : We evaluated the ultrasonographic findings of histopathologically proved 135 fibroadenomas in 103 patients from January 1980 to September 1990, retrospectively. The ultrasonographic examinations were performed with a hand held linear array 5MHz transducer(Acuson 128(USA). Aloka 650, 280(Japan)), A sonopad was also used during the examinations.RESULTS : The common ultrasonographic findings of fibroadenomas usually showed smooth contour in 120 lesions(88.9%), oval or round shape in 114 lesions(84.4%). uniform homogeneous echogenecity in 106 lesions(78.5%), intermediate hypoechoic internal echo pattern in 105 lesions(77.8%), thin boundary echo in 117 lesions(86.7% ), lateral shadowings in 97 lesions(72%) , and posterior acoustic enhancement in 56 lesions(41%) . The longitudinal/transverse ratio of fibroadenoma was revealed between 0.2 and 1.14 (mean0.58) and usually under 1.0 (68.9%).CONCLUSION : Finally, most of fibroadenomas are easily diagnosed by ultrasonography but if differential diagnosis from malignant breast mass is difficult due to atypical appearance, other combined modalities such as filmmammography, fine needle aspiration biopsy and MRI are necessary.