Reproducibility of Volumetric Computed Tomography of Stable Small Pulmonary Nodules with Implications on Estimated Growth Rate and Optimal Scan Interval.
To use clinically measured reproducibility of volumetric CT (vCT) of lung nodules to estimate error in nodule growth rate in order to determine optimal scan interval for patient follow-up.We performed quantitative vCT on 89 stable non-calcified nodules and 49 calcified nodules measuring 3-13 mm diam...
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Public Library of Science (PLoS)
2015-01-01
|
| Series: | PLoS ONE |
| Online Access: | http://europepmc.org/articles/PMC4575025?pdf=render |
| _version_ | 1811278780962963456 |
|---|---|
| author | Gary T Smith Ahmad R Rahman Ming Li Brandon Moore Hester Gietema Giulia Veronesi Pierre P Massion Ronald C Walker |
| author_facet | Gary T Smith Ahmad R Rahman Ming Li Brandon Moore Hester Gietema Giulia Veronesi Pierre P Massion Ronald C Walker |
| author_sort | Gary T Smith |
| collection | DOAJ |
| description | To use clinically measured reproducibility of volumetric CT (vCT) of lung nodules to estimate error in nodule growth rate in order to determine optimal scan interval for patient follow-up.We performed quantitative vCT on 89 stable non-calcified nodules and 49 calcified nodules measuring 3-13 mm diameter in 71 patients who underwent 3-9 repeat vCT studies for clinical evaluation of pulmonary nodules. Calculated volume standard deviation as a function of mean nodule volume was used to compute error in estimated growth rate. This error was then used to determine the optimal patient follow-up scan interval while fixing the false positive rate at 5%.Linear regression of nodule volume standard deviation versus the mean nodule volume for stable non-calcified nodules yielded a slope of 0.057 ± 0.002 (r2 = 0.79, p<0.001). For calcified stable nodules, the regression slope was 0.052 ± 0.005 (r2 = 0.65, p = 0.03). Using this with the error propagation formula, the optimal patient follow-up scan interval was calculated to be 81 days, independent of initial nodule volume.Reproducibility of vCT is excellent, and the standard error is proportional to the mean calculated nodule volume for the range of nodules examined. This relationship constrains statistical certainty of vCT calculated doubling times and results in an optimal scan interval that is independent of the initial nodule volume. |
| first_indexed | 2024-04-13T00:41:59Z |
| format | Article |
| id | doaj.art-4908ea2a7eb049c18a919b45958364fd |
| institution | Directory Open Access Journal |
| issn | 1932-6203 |
| language | English |
| last_indexed | 2024-04-13T00:41:59Z |
| publishDate | 2015-01-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS ONE |
| spelling | doaj.art-4908ea2a7eb049c18a919b45958364fd2022-12-22T03:10:07ZengPublic Library of Science (PLoS)PLoS ONE1932-62032015-01-01109e013814410.1371/journal.pone.0138144Reproducibility of Volumetric Computed Tomography of Stable Small Pulmonary Nodules with Implications on Estimated Growth Rate and Optimal Scan Interval.Gary T SmithAhmad R RahmanMing LiBrandon MooreHester GietemaGiulia VeronesiPierre P MassionRonald C WalkerTo use clinically measured reproducibility of volumetric CT (vCT) of lung nodules to estimate error in nodule growth rate in order to determine optimal scan interval for patient follow-up.We performed quantitative vCT on 89 stable non-calcified nodules and 49 calcified nodules measuring 3-13 mm diameter in 71 patients who underwent 3-9 repeat vCT studies for clinical evaluation of pulmonary nodules. Calculated volume standard deviation as a function of mean nodule volume was used to compute error in estimated growth rate. This error was then used to determine the optimal patient follow-up scan interval while fixing the false positive rate at 5%.Linear regression of nodule volume standard deviation versus the mean nodule volume for stable non-calcified nodules yielded a slope of 0.057 ± 0.002 (r2 = 0.79, p<0.001). For calcified stable nodules, the regression slope was 0.052 ± 0.005 (r2 = 0.65, p = 0.03). Using this with the error propagation formula, the optimal patient follow-up scan interval was calculated to be 81 days, independent of initial nodule volume.Reproducibility of vCT is excellent, and the standard error is proportional to the mean calculated nodule volume for the range of nodules examined. This relationship constrains statistical certainty of vCT calculated doubling times and results in an optimal scan interval that is independent of the initial nodule volume.http://europepmc.org/articles/PMC4575025?pdf=render |
| spellingShingle | Gary T Smith Ahmad R Rahman Ming Li Brandon Moore Hester Gietema Giulia Veronesi Pierre P Massion Ronald C Walker Reproducibility of Volumetric Computed Tomography of Stable Small Pulmonary Nodules with Implications on Estimated Growth Rate and Optimal Scan Interval. PLoS ONE |
| title | Reproducibility of Volumetric Computed Tomography of Stable Small Pulmonary Nodules with Implications on Estimated Growth Rate and Optimal Scan Interval. |
| title_full | Reproducibility of Volumetric Computed Tomography of Stable Small Pulmonary Nodules with Implications on Estimated Growth Rate and Optimal Scan Interval. |
| title_fullStr | Reproducibility of Volumetric Computed Tomography of Stable Small Pulmonary Nodules with Implications on Estimated Growth Rate and Optimal Scan Interval. |
| title_full_unstemmed | Reproducibility of Volumetric Computed Tomography of Stable Small Pulmonary Nodules with Implications on Estimated Growth Rate and Optimal Scan Interval. |
| title_short | Reproducibility of Volumetric Computed Tomography of Stable Small Pulmonary Nodules with Implications on Estimated Growth Rate and Optimal Scan Interval. |
| title_sort | reproducibility of volumetric computed tomography of stable small pulmonary nodules with implications on estimated growth rate and optimal scan interval |
| url | http://europepmc.org/articles/PMC4575025?pdf=render |
| work_keys_str_mv | AT garytsmith reproducibilityofvolumetriccomputedtomographyofstablesmallpulmonarynoduleswithimplicationsonestimatedgrowthrateandoptimalscaninterval AT ahmadrrahman reproducibilityofvolumetriccomputedtomographyofstablesmallpulmonarynoduleswithimplicationsonestimatedgrowthrateandoptimalscaninterval AT mingli reproducibilityofvolumetriccomputedtomographyofstablesmallpulmonarynoduleswithimplicationsonestimatedgrowthrateandoptimalscaninterval AT brandonmoore reproducibilityofvolumetriccomputedtomographyofstablesmallpulmonarynoduleswithimplicationsonestimatedgrowthrateandoptimalscaninterval AT hestergietema reproducibilityofvolumetriccomputedtomographyofstablesmallpulmonarynoduleswithimplicationsonestimatedgrowthrateandoptimalscaninterval AT giuliaveronesi reproducibilityofvolumetriccomputedtomographyofstablesmallpulmonarynoduleswithimplicationsonestimatedgrowthrateandoptimalscaninterval AT pierrepmassion reproducibilityofvolumetriccomputedtomographyofstablesmallpulmonarynoduleswithimplicationsonestimatedgrowthrateandoptimalscaninterval AT ronaldcwalker reproducibilityofvolumetriccomputedtomographyofstablesmallpulmonarynoduleswithimplicationsonestimatedgrowthrateandoptimalscaninterval |