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2. American field seed sale! save money!

Author

American Field Seed Company, Elder, E. E., Henry G. Gilbert Nursery and Seed Trade Catalog Collection, U.S. Department of Agriculture, National Agricultural Library, American Field Seed Company, Elder, E. E., and Henry G. Gilbert Nursery and Seed Trade Catalog Collection

Subjects
Catalogs, Chicago, Field crops, Illinois, Seed industry and trade, Seeds
Published
1947

3. American field seed sale, 1946 : save big money

Author

American Field Seed Company, Elder, E. E., Henry G. Gilbert Nursery and Seed Trade Catalog Collection, U.S. Department of Agriculture, National Agricultural Library, American Field Seed Company, Elder, E. E., and Henry G. Gilbert Nursery and Seed Trade Catalog Collection

Subjects
Catalogs, Chicago, Field crops, Illinois, Seed industry and trade, Seeds
Published
1946

4. American field seed sale, 1945 : save big money

Author

American Field Seed Company, Elder, E. E., Henry G. Gilbert Nursery and Seed Trade Catalog Collection, U.S. Department of Agriculture, National Agricultural Library, American Field Seed Company, Elder, E. E., and Henry G. Gilbert Nursery and Seed Trade Catalog Collection

Subjects
Catalogs, Chicago, Field crops, Illinois, Seed industry and trade, Seeds
Published
1945

5. American's economy seed special, Dec. 1944 to Jan. 16, 1945

Author

American Field Seed Company, Elder, E. E., Henry G. Gilbert Nursery and Seed Trade Catalog Collection, U.S. Department of Agriculture, National Agricultural Library, American Field Seed Company, Elder, E. E., and Henry G. Gilbert Nursery and Seed Trade Catalog Collection

Subjects
Chicago, Economic conditions, Field crops, Illinois, Nursery stock, Prices, Seed industry and trade, Seeds
Published
1944

6. American field seed sale, 1944 : save big money, star bargains for victory planting

Author

American Field Seed Company, Elder, E. E., Henry G. Gilbert Nursery and Seed Trade Catalog Collection, U.S. Department of Agriculture, National Agricultural Library, American Field Seed Company, Elder, E. E., and Henry G. Gilbert Nursery and Seed Trade Catalog Collection

Subjects
Catalogs, Chicago, Field crops, Illinois, Seed industry and trade, Seeds
Published
1944

7. American field seed sale, 1943 : save money

Author

American Field Seed Company, Elder, E. E., Henry G. Gilbert Nursery and Seed Trade Catalog Collection, U.S. Department of Agriculture, National Agricultural Library, American Field Seed Company, Elder, E. E., and Henry G. Gilbert Nursery and Seed Trade Catalog Collection

Subjects
Catalogs, Chicago, Field crops, Illinois, Seed industry and trade, Seeds
Published
1943

9. Star seed bargains : America's greatest seed sale, 1938 /

Author

American Field Seed Company, Elder, E. E., Henry G. Gilbert Nursery and Seed Trade Catalog Collection, U.S. Department of Agriculture, National Agricultural Library, American Field Seed Company, Elder, E. E., and Henry G. Gilbert Nursery and Seed Trade Catalog Collection

Subjects
Catalogs, Chicago, Field crops, Illinois, Seed industry and trade, Seeds
Published
1938

10. Star seed bargains : America's greatest seed sale, 1937 /

Author

American Field Seed Company, Elder, E. E., Henry G. Gilbert Nursery and Seed Trade Catalog Collection, U.S. Department of Agriculture, National Agricultural Library, American Field Seed Company, Elder, E. E., and Henry G. Gilbert Nursery and Seed Trade Catalog Collection

Subjects
Catalogs, Chicago, Field crops, Illinois, Seed industry and trade, Seeds
Published
1937

11. America's greatest seed sale : 77 star bargains, spring 1936 /

Author

American Field Seed Company, Elder, E. E., Henry G. Gilbert Nursery and Seed Trade Catalog Collection, U.S. Department of Agriculture, National Agricultural Library, American Field Seed Company, Elder, E. E., and Henry G. Gilbert Nursery and Seed Trade Catalog Collection

Subjects
Catalogs, Chicago, Field crops, Illinois, Seed industry and trade, Seeds
Published
1936

12. America's greatest seed sale : 77 star bargains, spring 1934 /

Author

American Field Seed Company, Elder, E. E., Henry G. Gilbert Nursery and Seed Trade Catalog Collection, U.S. Department of Agriculture, National Agricultural Library, American Field Seed Company, Elder, E. E., and Henry G. Gilbert Nursery and Seed Trade Catalog Collection

Subjects
Catalogs, Chicago, Field crops, Illinois, Seed industry and trade, Seeds
Published
1934

18. A quality assurance program for the On-Board Imager®.

Author

Kim, Sun I., Suh, Tae Suk, Magjarevic, R., Nagel, J. H., Yoo, Sua, Kim, G., Hammoud, R., Elder, E., Pawlicki, T., Guan, H., Fox, T., Luxton, G., Yin, F., and Munro, P.

Abstract

Purpose: To develop a comprehensive quality assurance (QA) program for the On-Board Imager (OBI) used for patient positioning verification and to present the results of QA tests over extended periods from multiple institutions. Radiographic and cone-beam computed tomography (CBCT) mode have been evaluated. Methods and Materials: The QA program consists of three parts; (1) safety and functionality (2) geometry and (3) image quality. Safety checks evaluate the functionality of collision interlocks and audible alarms. Functional QA checks the flow of clinical operation during tube warm-up. Geometry QA checks geometrical accuracy and variation of the OBI/CBCT and hardware/software. Image quality QA includes measurements to monitor accuracy and stability of the OBI/CBCT imaging system. Results: All test items show stable functionality for safety and functional QA on a daily bases. The precision of arm positioning is very high with variation of 1mm and average accuracy of < 1mm over 8 months. The average accuracy of the isocenter and couch shift is < 1mm with variation of 1mm over 11 months. Arm position was performed when the results were > 2 mm. Results of geometry QA have been stable within tolerances through the test periods. All tests for Image quality tests also show consistent results within tolerances. Conclusion: We have developed a practical yet comprehensive set of QA tests for the OBI system. Data collected for these tests over the extended period show that the OBI system has mechanical reliability and stable image quality. Nevertheless, the tests were useful in detecting performance deficits in the OBI system that needed recalibration. It is important that all tests are performed on a regular basis within a suggested period to establish a guideline. [ABSTRACT FROM AUTHOR]

Published
2007
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