What question did this study set out to answer?

Develop a rapid nomograph-based calculation method to determine seed spacing and total seed counts for uniform iodine-125 interstitial implants.

January 1, 1976Medical Physics

Spacing nomograph for interstitial implants of 125 I seeds

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Authors

LALowell L. AndersonMemorial Sloan Kettering Cancer Center

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Implication

Technical report demonstrates a nomograph for calculating seed spacing in iodine-125 interstitial implants, indicating faster determination of uniform dose distribution.

Key Points

Develop a rapid nomograph-based calculation method to determine seed spacing and total seed counts for uniform iodine-125 interstitial implants.
Utilized the dimension averaging approach where total implanted activity equals five times the average target dimension.
Derived spacing equations incorporating fractional powers—specifically the two-thirds power of target dimension and the one-third power of seed strength—along with corrections for target shape and elongation.
Produced a nomograph that resolves complex non-linear spacing formulas that are otherwise inaccessible via mental arithmetic.
Established baseline spacing derived from equipartition of target volume, which can be scaled using a direct adjustment factor when peripheral seeds mark the implant boundary.

Cite This Study

Lowell L. Anderson (1976) studied this question.

synapsesocial.com/papers/6aae448c8eb8828bae5f36f5 https://doi.org/10.1118/1.594269

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Implication

Technical report demonstrates a nomograph for calculating seed spacing in iodine-125 interstitial implants, indicating faster determination of uniform dose distribution.

Spacing nomograph for interstitial implants of 125 I seeds

Discussion

Member takes

Implication

Key Points

Cite This Study

Spacing nomograph for interstitial implants of 125 I seeds

Discussion

Member takes

Implication

Key Points

Cite This Study

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