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1.
BMC Med Imaging ; 22(1): 180, 2022 10 17.
Artigo em Inglês | MEDLINE | ID: mdl-36253718

RESUMO

BACKGROUND: Recent advances in rapid imaging techniques necessitate the reconsideration of the optimal imaging delay time for contrast-enhanced T1-weighted imaging. The aim of our study was to determine the optimal contrast-enhanced T1-weighted imaging delay time from the obtained time-signal intensity curve (TIC) using gadobutrol in patients with brain metastases, primary brain tumors, and meningiomas. METHODS: This prospective study enrolled 78 patients with brain metastases (n = 39), primary brain tumors (n = 22), or meningiomas (n = 17) who underwent 7-min dynamic contrast-enhanced imaging with single-dose gadobutrol. Based on the time-to-peak (TTP) derived from the TIC, we selected four different time points for analysis. Lesion conspicuity, enhanced rate (ER) and contrast rate (CR) of 116 index lesions were evaluated. Statistical comparisons were made for the four different time points using the Friedman test. RESULTS: Maximum TTP (305.20 ± 63.47 s) was similar across all three groups (p = 0.342). Lesion conspicuity, CR and ER increased over time in all index lesions; however, no significant difference between the 5- and 7-min images was observed. The longest diameter in all groups differed significantly among time points (p < 0.001); the perpendicular diameter did not differ between the 5- and 7-min images. CONCLUSIONS: Maximum contrast enhancement and lesion conspicuity was achieved 5-7 min after a single gadobutrol injection for brain metastases detection and for primary brain tumor/meningioma evaluation. Acquiring images 5 min after gadobutrol injection is the optimal timing for brain tumor detection during MRI work-up.


Assuntos
Neoplasias Encefálicas , Neoplasias Meníngeas , Meningioma , Compostos Organometálicos , Encéfalo , Neoplasias Encefálicas/diagnóstico por imagem , Neoplasias Encefálicas/secundário , Meios de Contraste , Humanos , Imageamento por Ressonância Magnética/métodos , Estudos Prospectivos
2.
J Vet Sci ; 8(4): 427-9, 2007 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-17993759

RESUMO

A 5 year-old, intact female Yorkshire terrier was referred for dysuria and dyschezia. The radiographic and ultrasound examination showed a round shaped mass caudal to the urinary bladder that contained anechoic fluid within the thin walls. During surgery, the cyst was noted to be attached to the outer wall of the vagina, not connected to the vaginal lumen. Cystic fluid was removed and the cystic wall was resected. Then the remaining cystic wall was omentalized to prevent a recurrence. Histological examination confirmed that the cyst was of Wolffian duct origin. In this case, a large Gartner duct cyst causing urological problems was diagnosed and removed by surgical resection.


Assuntos
Cistos/veterinária , Doenças do Cão/patologia , Doenças Vaginais/veterinária , Ductos Mesonéfricos/patologia , Animais , Constipação Intestinal/etiologia , Constipação Intestinal/veterinária , Cistos/diagnóstico por imagem , Cistos/cirurgia , Doenças do Cão/diagnóstico por imagem , Doenças do Cão/cirurgia , Cães , Disuria/etiologia , Disuria/veterinária , Feminino , Resultado do Tratamento , Ultrassonografia , Doenças Vaginais/complicações , Doenças Vaginais/patologia , Doenças Vaginais/cirurgia , Ductos Mesonéfricos/cirurgia
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