1. NAME AND TITLE
KUX: Medical X-Ray Shielding Calculation.
Douglas J. Simpkin. Address: Dept. of Radiology, St. Luke's Medical Center, Milwaukee,
3. CODING LANGUAGE AND COMPUTER
Fortran 77; IBM PC and VAX family.
4. NATURE OF PROBLEM SOLVED
KUX calculates the thickness of barrier materials required to bring the weekly exposure near an
x-ray or mammography room down to the maximum permitted (or some other user-specified level).
5. METHOD OF SOLUTION
KUX uses the NCRP Report 49 x-ray shielding calculational techniques as generalized by Simpkin using the constant potential x-ray and mammography transmission data from the literature. Program flow and logic follows that of the earlier BASIC program CCC-509/KUXKVPS.
Briefly, the theory states that the required shielding thickness, x, can be calculated if you know the
primary and scatter Kuxi's and leakage Blxi's for each i x-ray tube calculated separately. The result
is a transcendental equation to be satisfied for the shielding thickness. The variables Kux and Blx are
defined in NCRP Report 49 as the quotient of exposure at unit distance and workload (Kux) and
transmission factor for leakage x rays (Blx). Shielding data from the literature are included in DATA
statements for lead, concrete, gypsum, steel, and plate glass.
6. RESTRICTIONS OR LIMITATIONS
The code was modified to accommodate NCRP 91 dose restrictions.
7. TYPICAL RUNNING TIME
KUX is interactive and takes several minutes on a PC.
8. COMPUTER HARDWARE REQUIREMENTS
KUX runs on IBM PC and compatibles and on the VAX/VMS family of computers. The
executable code does not require a math co-processor.
9. COMPUTER SOFTWARE REQUIREMENTS
The code was written in Fortran 77 and was tested under DOS 3.3 (IBM PC). An executable file,
produced by the MSFORT Version 4.01 compiler, is included.
a. Included in the documentation
D. J. Simpkin, "A General Solution to the Shielding of Medical X and Gamma Rays by the NCRP Report No. 49 Methods," Health Physics 52(4):431-436 (1987).
D. J. Simpkin, "Shielding Requirements for Mammography," Health Physics 53(3):267-279 (1987).
D. J. Simpkin, "Shielding Requirements for Constant-Potential Diagnostic X-Ray Beams Determined by a Monte Carlo Calculation," Health Physics 56(2):151-164 (1989).
"Listing of Sample Interactive Session."
b. Background information
Structural Shielding Design and Evaluation for Medical use of X Rays and Gamma Rays of
Energies Up to 10 MeV, NCRP Report 49, National Council on Radiation Protection and Measurements (1976).
11. CONTENTS OF CODE PACKAGE
Included are the referenced documents and one (360 K) DOS diskette on which the programs and
executable files are written. A documentation (README.DOC) file is also included.
12. DATE OF ABSTRACT
May 1989; revised October 1991.
KEYWORDS: X-RAY; GAMMA-RAY; SLAB; PARAMETRIC MODELS;