Biomaterial Database

TDF formula with arbitrary exponents for treatment time and fraction numbers. 1990

H Kubo

Department of Radiation Oncology, University of Rochester Cancer Center, New York 14642.

The original "Ellis NSD equation" was extended to a more general formula using arbitrary exponents for the total treatment time (T) and the number of treatments (N). The new formula is intended to bridge the gap between the original equation for connective tissue and any other tissues of different radiation tolerance. The advantages of the new formula were found to be simple, independent of a scaling factor, and applicable for either cgs or SI units. This paper presents a mathematical practice and does not include any clinical implications.

UI	MeSH Term	Description	Entries
D008433	Mathematics	The deductive study of shape, quantity, and dependence. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)	Mathematic
D011836	Radiation Tolerance	The ability of some cells or tissues to survive lethal doses of IONIZING RADIATION. Tolerance depends on the species, cell type, and physical and chemical variables, including RADIATION-PROTECTIVE AGENTS and RADIATION-SENSITIZING AGENTS.	Radiation Sensitivity,Radiosensitivity,Sensitivity, Radiation,Tolerance, Radiation,Radiation Sensitivities,Radiation Tolerances,Radiosensitivities,Sensitivities, Radiation,Tolerances, Radiation
D011879	Radiotherapy Dosage	The total amount of radiation absorbed by tissues as a result of radiotherapy.	Dosage, Radiotherapy,Dosages, Radiotherapy,Radiotherapy Dosages
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D013997	Time Factors	Elements of limited time intervals, contributing to particular results or situations.	Time Series,Factor, Time,Time Factor