CT Individual Dose Project
Principal Investigator
Name
Randell Kruger
Degrees
PhD
Institution
Marshfield Clinic Research Foundation
Position Title
Medical Physicist
About this CDAS Project
Study
NLST
(Learn more about this study)
Project ID
201012-0028
Initial CDAS Request Approval
Dec 28, 2010
Title
CT Individual Dose Project
Summary
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>.
Aims
Deduce the effective radiation dose associated with individual NLST CT examinations. 2. Describe the distribution of NLST effective dose CT values.
Related Publications
-
Estimated radiation dose associated with low-dose chest CT of average-size participants in the National Lung Screening Trial.
Larke FJ, Kruger RL, Cagnon CH, Flynn MJ, McNitt-Gray MM, Wu X, Judy PF, Cody DD
AJR Am J Roentgenol. 2011 Nov; Volume 197 (Issue 5): Pages 1165-9 PUBMED -
Normalized CT dose index of the CT scanners used in the National Lung Screening Trial.
Cody DD, Kim HJ, Cagnon CH, Larke FJ, McNitt-Gray MM, Kruger RL, Flynn MJ, Seibert JA, Judy PF, Wu X
AJR Am J Roentgenol. 2010 Jun; Volume 194 (Issue 6): Pages 1539-46 PUBMED