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In a retrospective review of 55 patients with carcinoma of the colon and rectum, air contrast enema detected 91 per cent of the Dukes' A and B lesions and 96 per cent of the Dukes' C and D lesions. This roentgenographic method is an effective diagnostic tool for use at all colorectal levels, including the rectum. Results suggest that the initial work-up of… (More)
The effects of prior knowledge and instruction on understanding image formation, " J. The role of conceptual conflict in conceptual change and the design of science instruction, " Instr. The initial knowledge state of college physics students, " Am.