RESUMO
In the emergency setting, dual imaging was performed in 42 examinations using conventional and computed radiography imaging (CRI) systems. Six specialists considered computed images to be preferable to conventional radiographs in 28% of observations, of equal quality in 50% of observations, and of lesser quality in 22% of observations, even though incorrect processing algorithms were used in 62% of the digital exams. Correct processing improved CRI image characteristics and increased its desirability over conventional studies, suggesting that digital imaging will have greater application in the emergency setting as processing features are simplified.
Assuntos
Serviço Hospitalar de Emergência , Interpretação de Imagem Assistida por Computador/normas , Intensificação de Imagem Radiográfica/tendências , Interpretação de Imagem Radiográfica Assistida por Computador/normas , Avaliação da Tecnologia Biomédica , Estudos de Avaliação como Assunto , Los Angeles , Controle de Qualidade , Estados UnidosRESUMO
Mediolateral and craniocaudal film-screen mammograms and a mediolateral noncontact xeromammogram obtained for 53 women with breast cancer were randomly evaluated, alone and in combination, by four mammographers in a blind, randomized fashion. Cancer detection was improved the greater the number of views evaluated. Certain cancers, by virtue of their position in the breast, can be obscured by superimposed dysplastic tissue on one view while being detectable on another which images the breast in a different projection. Some cancers posterolaterally located within the breast may be obscured by the rib cage on the mediolateral noncontact xeromammogram, but may be easily identified on the mediolateral or craniocaudal film-screen mammograms. Other posteriorly situated carcinomas may be projected off the film edge on the mediolateral and craniocaudal film-screen mammograms performed with compression, but may be imaged on the mediolateral noncontact xeromammogram. Xeromammography better images fine detail and microcalcifications, while film-screen mammography permits greater broad-area contrast. A combined film-screen/xeromammographic examination optimizes complementary projections and imaging techniques.
Assuntos
Neoplasias da Mama/diagnóstico , Carcinoma/diagnóstico , Mamografia/métodos , Xeromamografia/métodos , Adulto , Ensaios Clínicos como Assunto , Método Duplo-Cego , Feminino , Humanos , Pessoa de Meia-IdadeRESUMO
A technique for internal auditory cisternography is described. A small volume of Iophendylate is used and coronal hypocycloid tomographic sections of the dependent internal auditory canal and adjacent cerebellopontine angle cistern performed.
