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Principal Investigator
Randell Kruger
Marshfield Clinic Research Foundation
Position Title
Medical Physicist
About this CDAS Project
NLST (Learn more about this study)
Project ID
Initial CDAS Request Approval
Dec 28, 2010
CT Individual Dose Project
Data from the Administrative section and part A of the “Spiral CT Screening Examination Form (SCT)” describing the radiographic technique used for each CT examination in the trial will be used to deduce the effective radiation dose of each examination. The radiographic techniques along the radiation beam quality obtained as a part of annual QA tests will be analyzed using a Monte Carlo radiation transport analysis to compute effective dose. Summary statistics from the results will be reported. Case effective doses and organ doses will be estimated using Monte Carlo calculations, normalized CT Dose Index of the CT Scanners1, exam mAs exposures, exam tube potential, case height, and case weight. These calculations will be compared with chest x-ray doses completed by the Joint Medical Physics Committee.

Note: Additional work related to this project is being continued in <a href="/cdas/nlst/pubs_projects/project/474/">201110-0020</a>.

Deduce the effective radiation dose associated with individual NLST CT examinations. 2. Describe the distribution of NLST effective dose CT values.

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