RESUMEN
BACKGROUND: Posterior circulation of brain is important because of vital organs' blood supply provided by them. In this study, we evaluate the relationship of posterior circulation measurements with age, gender and side by using computed tomography angiography (CTA) images. MATERIALS AND METHODS: A total 199 brain CTA examinations were retrospectively analysed for all posterior circulation arteries (vertebral artery, basilar artery, posterior cerebral artery [PCA], superior cerebellar artery [SCA], anterior inferior cerebellar artery, and posterior inferior cerebellar artery [PICA]) to compare the difference based on age, gender and side. RESULTS: There is no correlation between age and the mean diameters of all vessels (p > 0.05). The mean diameter of left vertebral artery was higher than right vertebral artery in all genders (p = 0.004 for males and p < 0.001 for females). The mean diameter of left SCA and PICA were higher than right SCA and PICA in females (p = 0.032 and p = 0.027, respectively). The mean diameters of basilar, left PCA, left SCA, left vertebral, right PCA, right SCA, right PICA and right vertebral artery were higher in males and that differences were statistically significant (p < 0.001, p = 0.002, p = 0.006, p = 0.004, p = 0.001, p = 0.003, p = 0.002, and p = 0.006, respectively). CONCLUSIONS: The posterior circulation vessel diameter is not affected by aging. The mean diameters of basilar artery, both PCAs, both SCAs, right PICA, both vertebral arteries were higher in males. The mean diameter of left vertebral artery is higher than that of right vertebral artery in all genders.
Asunto(s)
Angiografía por Tomografía Computarizada , Arteria Vertebral , Arteria Basilar/diagnóstico por imagen , Angiografía Cerebral , Femenino , Humanos , Masculino , Estudios Retrospectivos , Arteria Vertebral/diagnóstico por imagenRESUMEN
AIM: To assess the efficiency of a novel quiescent-interval single-shot (QISS) technique for non-contrast-enhanced magnetic resonance angiography (MRA) of haemodialysis fistulas. MATERIALS AND METHODS: QISS MRA and colour Doppler ultrasound (CDU) images were obtained from 22 haemodialysis patients with end-stage renal disease (ESRD). A radiologist with extensive experience in vascular imaging initially assessed the fistulas using CDU. Two observers analysed each QISS MRA data set in terms of image quality, using a five-point scale ranging from 0 (non-diagnostic) to 4 (excellent), and lumen diameters of all segments were measured. RESULTS: One hundred vascular segments were analysed for QISS MRA. Two anastomosis segments were considered non-diagnostic. None of the arterial or venous segments were evaluated as non-diagnostic. The image quality was poorer for the anastomosis level compared to the other segments (p<0.001 for arterial segments, and p<0.05 for venous segments), while no significant difference was determined for other vascular segments. CONCLUSION: QISS MRA has the potential to provide valuable complementary information to CDU regarding the imaging of haemodialysis fistulas. In addition, QISS non-enhanced MRA represents an alternative for assessment of haemodialysis fistulas, in which the administration of iodinated or gadolinium-based contrast agents is contraindicated.
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Derivación Arteriovenosa Quirúrgica , Fallo Renal Crónico/terapia , Angiografía por Resonancia Magnética/métodos , Diálisis Renal , Adulto , Estudios de Factibilidad , Femenino , Humanos , Masculino , Ultrasonografía Doppler en ColorRESUMEN
BACKGROUND: Vascular complications are a primary diagnostic consideration in liver transplant recipients, with an overall incidence of 9%. Cross-sectional imaging techniques provide information regarding vascular structure and luminal patency but can not quantitatively assess hepatocyte damage in the liver graft parenchyma. Perfusion computerized tomography (CT) is a recently developed method that allows for quantitative evaluation of hemodynamic changes in tissue. Our objective was to evaluate the clinical utility of perfusion CT in assessing vascular complications during living-donor liver transplantation (LDLT). METHODS: The 33 recipients were divided into 3 groups according to Doppler ultrasonographic findings: hepatic arterial complication group, portal venous complication group, and hepatic venous complication group. Blood volume (BV), blood flow (BF), arterial liver perfusion (ALP), portal venous perfusion (PVP), and hepatic perfusion index (HPI) were calculated for the affected vascular territory regions. RESULTS: Compared with normal liver parenchyma, BV, BF, ALP, and HPI were significantly lower in the hepatic arterial complication group. Although PVP and BV were significantly lower, ALP, HPI, and BF were higher in the affected vascular territory region than in normal liver parenchyma for the portal venous complication group. In the hepatic venous complication group, PVP was significantly higher and BF, ALP, and HPI significantly lower in the affected vascular territory regions than in normal liver parenchyma. CONCLUSIONS: Perfusion CT imaging is a noninvasive technique that enables the quantitative evaluation of vascular complications in the graft parenchyma after LDLT and permits a quantitative evaluation of the treatment response.
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Neoplasias Hepáticas/cirugía , Trasplante de Hígado , Donadores Vivos , Imagen de Perfusión/métodos , Tomografía Computarizada por Rayos X/estadística & datos numéricos , Adulto , Anciano , Femenino , Humanos , Neoplasias Hepáticas/diagnóstico por imagen , Masculino , Persona de Mediana Edad , Estudios Prospectivos , Tomografía Computarizada por Rayos X/métodosRESUMEN
One of the rare indications for liver transplantation is hepatic alveolar echinococcosis (AE). We present a case of hepatic AE with portal vein involvement.
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Equinococosis Hepática/patología , Equinococosis Hepática/terapia , Trasplante de Hígado , Femenino , Humanos , Adulto JovenAsunto(s)
Calcinosis/diagnóstico , Calcinosis/patología , Neoplasias Hepáticas/diagnóstico , Neoplasias Hepáticas/secundario , Neoplasias del Recto/patología , Tomografía Computarizada por Rayos X , Adulto , Biomarcadores de Tumor/sangre , Humanos , Pruebas de Función Hepática , Neoplasias Hepáticas/patología , Ganglios Linfáticos/diagnóstico por imagen , Ganglios Linfáticos/patología , Masculino , Cavidad Peritoneal/diagnóstico por imagen , Cavidad Peritoneal/patología , Neoplasias del Recto/terapiaRESUMEN
AIM: To evaluate the role of gadolinium ethoxybenzyl diethylenetriamine pentaacetic acid (Gd-EOB-DTPA)-enhanced magnetic resonance cholangiography (MRC) in the evaluation of biliary-cyst communication (BCC) before treatment for hepatic hydatid disease (HHD). MATERIAL AND METHODS: Thirty-one patients with clinical and laboratory follow-up for HHD with suspected diagnosis of BCC underwent three-dimensional (3D) T2-weighted MRC and T1-weighted contrast-enhanced MRC, dynamic 3D gradient echo (GRE) sequences, using Gd-EOB-DTPA to identify the presence or absence of BCC. A total of 45 hepatic hydatid cysts in the 31 patients were evaluated for cyst diameter, BCC, and the time to contrast-enhancement of the hydatid cyst after Gd-EOB-DTPA injection. The surgical and interventional radiological procedures and imaging findings were compared. The sensitivity, specificity, and accuracy of both techniques in identification of BCC were calculated. RESULTS: The accuracy of contrast-enhanced MRC for identifying BCC was superior with a sensitivity of 87.4% and accuracy of 90.5% (p < 0.05). A diameter of ≥10 cm was associated with significantly increased risk of BCC on contrast-enhanced MRC images (p < 0.05). CONCLUSION: The use of Gd-EOB-DTPA-enhanced MRC yields information that complements T2-weighted MRC findings and improves identification of BCC. The use of T2-weighted MRC, in addition to contrast-enhanced MRC, is recommended to increase preoperative accuracy of identifying BCC.
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Pancreatocolangiografía por Resonancia Magnética , Medios de Contraste , Equinococosis Hepática/diagnóstico , Gadolinio DTPA , Adulto , Femenino , Humanos , Imagenología Tridimensional , Masculino , Persona de Mediana Edad , Valor Predictivo de las Pruebas , Estudios Prospectivos , Sensibilidad y EspecificidadRESUMEN
Supernumerary testis or polyorchidism is a rare congenital anomaly with about 200 reported cases in the literature. It may be associated with cryptorchidism, testicular torsion and neoplasms. Ultrasonography and magnetic resonance imaging are effective noninvasive methods of accurately detecting polyorchidism. In most cases, ultrasonography is diagnostic and magnetic resonance imaging plays confirmatory role by providing additional information if complicated with neoplasia. We report a case of 16-year-old man with right supernumerary testis associated with adenomatous hyperplasia of the rete testis, its sonographic and magnetic resonance imaging findings and management.
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Red Testicular/anomalías , Testículo/anomalías , Humanos , Hiperplasia , Imagen por Resonancia Magnética , Masculino , Red Testicular/patología , Enfermedades Testiculares/diagnóstico por imagen , Testículo/diagnóstico por imagen , Ultrasonografía Doppler en ColorRESUMEN
BACKGROUND: Congenital heart diseases (CHD) are the leading cause of birth defect-related deaths. Multi detector computed tomography (MDCT) plays an important role for imaging CHD in addition to echocardiography and provides a comprehensive evaluation of complex heart malformations for the referring cardiologist. The aim of the study was to evaluate the utility of MDCT in the assessment of CHD. MATERIALS AND METHODS: A 102 patients with CHD were investigated after initial assessment by echocardiography. The information obtained by MDCT and findings of echocardiography were reviewed together by paediatric cardiologists and cardiac radiologists. Perioperative anatomic descriptions, wherever available(n = 34) formed the gold standard for the comparison. RESULTS: The clinical consensus diagnosis defined 154 cardiovascular lesions in the patients. The results were classified in groups. We present the appearance of various congenital cardiac lesions seen in clinical practice. CONCLUSIONS: MDCT provides important information about anatomic details of CHD for the referring cardiologist. The evaluation of different anatomic structures such as heart, great vessels, lungs and abdomen is possible in one acquisition with this technique.
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Deformidades Congénitas de la Mano/diagnóstico por imagen , Tomografía Computarizada Multidetector/métodos , Tomografía Computarizada Multidetector/normas , Preescolar , Femenino , Humanos , Lactante , Recién Nacido , Masculino , Estándares de Referencia , Reproducibilidad de los ResultadosRESUMEN
Partial anomalous pulmonary venous return (PAPVR) is a congenital anomaly that involves drainage of one to three pulmonary veins directly into the right heart or systemic venous system, creating a partial left-to-right shunt. This drainage is associated with cardiac abnormalities such as mitral stenosis and pulmonary stenosis, patent ductus arteriosus, and atrial septal defects. We report a case of PAPVR associated with vascular anomalies of the aorta by multidetector computed tomography in an adult female patient.