MR imaging of osteoid osteoma Glass, R B; Poznanski, A K; Fisher, M R ...
Journal of computer assisted tomography,
11/1986, Letnik:
10, Številka:
6
Journal Article
Recenzirano
An osteoid osteoma was detected in a young boy with a classic history for this lesion. Plain radiography was not helpful but ultrasound and magnetic resonance imaging demonstrated the tumor nidus.
Some colleges of education and urban school districts have established collaborative Professional Development Schools (PDSs) to prepare teachers across the learning-to-teach continuum to address the ...particular needs of low-income, culturally and linguistically diverse students. Wong and Glass examine the findings from preliminary assessments developed for a large-scale PDS experiment undertaken by a California state university and its partner urban schools. They also consider the links between assessment and program development and innovation.
Some colleges of education and urban school districts have established collaborative Professional Development Schools (PDSs) to prepare teachers across the learning-to-teach continuum (pre-service to ...in-service to instructional leaders) to address the particular needs of low-income, culturally and linguistically diverse (LI/CLD) students. Outcomes, either in regard to K-12 pupils or to pre-service and in-service teachers, have been infrequently examined despite the proliferation of these reforms. Urban PDS experiments encounter many challenges that obstruct efforts to create learning environments that embody the "engaged pedagogy" necessary for LI/CLD students to succeed. This article examines the findings from preliminary assessments developed for a large-scale PDS experiment undertaken by a California state university and its partner urban schools. Despite the limitations, these have provided important information that has sustained the innovative work unfolding in the PDSs. In addition to reviewing the approaches to assessment undertaken by this PDS project, this article considers the links between assessment and program development and innovation. (Contains 2 tables and 2 notes.)
Book reviewed in this article:
Reading Poverty. By Patrick Shannon. 1998.
Text, Lies, and Videotape: Stories About Life, Literacy, and Learning. By Patrick Shannon. 1995.
The Struggle to Continue: ...Progressive Reading Instruction in the United States. By Patrick Shannon. 1990.
Broken Promises: Reading Instruction in Twentieth‐Century America. By Patrick Shannon. 1989.
The purpose of this paper is to provide a detailed radiologic description of the postnatal developmental anatomy of the sacrum and coccyx as revealed by MR imaging, helical CT, and conventional ...radiography.
One hundred ten imaging examinations of the sacrococcygeal spine were performed in patients who were newborn to 30 years old. Imaging included conventional radiography (n = 63), three-dimensional gradient-recalled echo MR imaging (n = 10), and helical CT with sagittal and angled coronal reformations (n = 37). A detailed analysis was performed of the ossification and fusion of the primary and secondary ossification centers.
The sacrum and coccyx were noted to develop from 58 to 60 sacral ossification centers and eight coccygeal centers, respectively. These centers were noted to ossify and fuse in an organized temporal pattern from the fetal period to the age of 30.
The sacrum and coccyx are formed by a complex process that fuses primary and secondary ossification centers. Because the maturation process can be asymmetric, an understanding of this process may prove useful for distinguishing physeal plates from fracture lines.
Development and implementation of furbearer management programs are becoming increasingly complex in the United States. Due to a variety of sociocultural, ecological, demographic, and economic ...factors, trapping participation is on the decline in many areas of the United States. Knowledge about the values and motivations of trappers is important in designing trapping programs for effective furbearer management that also provide benefits and satisfaction to participants. Our purpose was to gain information about the sociocultural dimensions of fur trapping in the northeastern United States. In 1994 we sent a 14-page mailback questionnaire to a sample of licensed trappers in Maine, Massachusetts, New York, Pennsylvania, Vermont, and West Virginia. We had an overall response rate of 65%, with 2,279 usable questionnaires. Factor analysis identified 5 major underlying dimensions, or factors, characterizing trappers in the Northeast: Lifestyle Orientation, Nature Appreciation, Animal Control, Self Sufficiency, and Affiliation with Other People. A greater understanding of the human dimensions associated with trapping of furbearers will assist managers and policy makers in developing effective resource management programs.
Our objective was to describe the MR cholangiography findings for young patients with suspected biliary disease who underwent half-Fourier acquisition fast spin-echo technique with respiratory ...triggering.
Twenty-eight MR cholangiography studies were performed in 22 patients on a 1.5-T MR unit. Ten of these 22 patients had undergone liver transplantation.
MR cholangiography revealed abnormalities of both the extrahepatic and the intrahepatic major and minor bile duct systems, despite the small diameter of the duct system in this group of patients. Four patterns of biliary disease were shown: global dilatation of extrahepatic or intrahepatic ducts (n = 7); segmental, uniform dilatation of central or peripheral intrahepatic ducts (n = 9); segmental, nonuniform dilatation of central or peripheral intrahepatic ducts (n = 2); and fusiform ectasia with segmental, irregular intrahepatic dilatation and bile lakes (n = 2). The findings of eight studies were interpreted as normal. The four patterns of abnormalities were correlated with the results from percutaneous transhepatic cholangiography, T-tube cholangiography, and liver biopsy and with clinical and surgical information, as available.
MR cholangiography is a noninvasive technique for evaluation of biliary disease. The improved resolution afforded by respiratory triggering permits evaluation of both major and minor bile ducts, even in young, uncooperative subjects. Four patterns of abnormalities were prospectively identified, correlated with other information, and used to direct clinical treatment.
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