AJR. American journal of roentgenology
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AJR Am J Roentgenol · Oct 1994
Comparative StudyFat-suppressed spoiled GRASS imaging of knee hyaline cartilage: technique optimization and comparison with conventional MR imaging.
We studied healthy volunteers with fat-suppressed three-dimensional (3D) spoiled gradient-recalled acquisition in the steady state (SPGR) to determine parameters that maximize positive contrast between knee articular cartilage and fluid, marrow fat, and muscle; and we compared the technique with conventional MR imaging sequences. The purpose was to determine if fat-suppressed 3D SPGR imaging is useful for detecting abnormalities of the articular cartilages. ⋯ When a fat-suppressed 3D SPGR sequence of 60/5/40 degrees (TR/TE/flip angle) is used, MR images can show high positive contrast between articular hyaline cartilage and adjacent structures. This convenient technique is different from standard MR imaging sequences because it demonstrates greater signal intensity in cartilage than in fluid, marrow fat, and muscle, and because it consistently shows an organized internal architecture of hyaline cartilage. Fat-suppressed 3D SPGR imaging therefore has promise for detecting abnormalities of the articular cartilage.
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AJR Am J Roentgenol · Oct 1994
Financial support for research in radiology: a survey of original investigations published in the AJR and Radiology.
This study was done to determine how often the original research published in AJR and Radiology is formally funded by external sources of explicit intramural institutional research grants and to explore the association of financial support with the subspecialty field; type of research (clinical vs basic); number of coauthors; number of departments, nonradiology departments, and institutions participating per paper; country of origin; and citation impact of investigations. ⋯ Only a small percentage of radiology research attracts formal, especially extramural, financial support. This should be a cause for concern. As the informal funding of investigations from redirected clinical revenues is diminishing, action will be required to procure funds to support the radiology research necessary for the vitality of the specialty.