PCXMC version information

Purchasers of earlier versions will obtain an update to the newest version without charge by contacting us.

Version number

Operating system

Known errors in this version

Notes

Supplementary

programs

Windows 95/98/NT/2000/XP/Vista/7/8/10

The program runs also in Windows 64-bit operating systems

In PCXMC20Rotation version 2.0.1.4, the program reports on "Invalid file format" when one tries to open *.mGR -files in the risk assessment module. This error has been corrected in PCXMC20Rotation version 2.0.1.5.  This error is not present in PCXMC 2.0.1.4
2.0.1.4

Windows 95/98/NT/2000/XP/Vista/7/8/10

The program runs also in Windows 64-bit operating systems

None.

The error in the previous version has been corrected.

2.0.1.3

Windows 95/98/NT/2000/XP/Vista/7

The program runs also in Windows 64-bit operating systems

When excessively large x-ray fields are used together with a short FSD, the calculated doses may be larger than the true values if the input dose is described in terms of incident air kerma or mAs. This overestimate is typically less than 1 %, and it is always less than 3 % for all practical conditions of x-ray diagnostics. However, the error may be much larger for unrealistically large x-ray beam sizes.

This error results from the simplistic calculation of the total number of x-ray quanta from the product of the x-ray field size and incident air kerma. Strictly, for an isotropically emitting point source, the number of quanta needs to be calculated from the beam area on a spherical surface instead of the beam area on a plane.

The problem in the previous version (which was seen only in a couple of PCs) has been corrected.

There is no reason for updating to this version unless you get warnings of "invalid floating point operation" when trying to use the autocalc-feature.

2.0.1.2

Windows 95/98/NT/2000/XP/Vista

The program runs also in Windows 64-bit operating systems

The "Autocalc"-feature does not work correctly in all operating systems (Windows 7). The program may display the warnings "invalid floating point operation" when autocalc is attempted.

The problem in the previous version (which was seen only in a couple of PCs) has been corrected.

There is no reason for updating to this version unless you get warnings of "invalid floating point operation" when trying to view the Examination Data Input form (DefForm).

2.0.1

Windows 95/98/NT/2000/XP/Vista

The program runs also in Windows 64-bit operating systems


 

Some PCs using the Windows Vista operating system do not show the images on the Examination Data Input form (DefForm) properly. The reason for this incompatibility issue is unknown.

The error in the risk calculation model has been corrected.

2.0

Windows 95/98/NT/2000/XP/Vista

An error in the female breast cancer risk model results in too high risk estimates for women over 30 years at the age of exposure. A similar error is present in the thyroid cancer risk model for both men and women.

The error in x-ray spectrum generation has been corrected.

The phantom has been updated. The program calculates the effective dose also with the tissue weightig factors of ICRP Publication 103.

The program assesses radiation-induced cancer risk.

The program runs now also in Windows Vista.

1.5.2

Windows 95/98/NT/2000/XP

If the user generates a spectrum using only filters made of heavier elements (e.g., copper) without any additional aluminium or beryllium filtration, the spectrum may exhibit an incorrect peak at the lowest energy channel. This will result in incorrect (too low) organ dose conversion coefficients. This error can be avoided by always including also a small amount of Al- or Be-filtration (0.1 mm is sufficient) in the filter specification. This error will be corrected in the next version.

The error in the earlier version has been corrected.

1.5.1

Windows 95/98/NT/
2000/XP

An error in the definition of the heart; heart doses somewhat too low.

The error in the earlier version has been corrected.

1.5

Windows 95/98/NT/
2000/XP

Errors can be introduced in the 'Grid-files' (\PCXMC\MCINDATA\GRI DS\ *.bin and *.asc) if the user clicks the Halt-button during the Monte Carlo simulation. The errors can be corrected by deleting all the grid-files. New files will be generated by PCXMC without user interference.

Improved user interface: All input data and figures have been put on the same form.

  • An x-ray field size and FSD calculator has been added
  • Possibility to estimate doses from the exposure technique without actual radiation measurements

1.4.1

Windows 95/98/NT/
2000/XP

None

  • The errors in the earlier versions have been corrected.
  • Small improvements in the user interface. For example, now the user can specify the reference point inside the phantom by clicking with the mouse in the phantom or radiograph image.

1.4

Windows 95/98/NT/
2000/XP

  • An error in calculating the average dose in skin: skin doses too high.
  • An error in using the infinite FSD (FSD specified as 0.0 in the program): photon histories could be erroneously started within the patients body. The doses to superficial organs could be too low and the doses to deeply located organs too high.
  • Exception alerts when the program was used for the first time for a given patient age and the user entered the radiograph image via the phantom image. This flaw caused no errors in calculation results, however.
  • Significant improvement in calculation speed over the earlier versions.
  • Improved user interface of the spectrum calculation and entrance dose input.
  • The user interface was improved by addition of the radiograph image

1.3

Windows 3.1

 

  • The errors in the earlier version have been corrected
  • The user interface was improved by addition of the phantom image.

1.2

Windows 3.1

Photons could not properly enter the lower limb area: doses from irradiations where the primary beam hit the legs resulted in too low doses.

 

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