The 2.2 version of ImpactDose is provided as a free download on our website. The actual developer of the program is CT Imaging GmbH. ImpactDose is included in Home & Hobby Tools.
From the developer:
ImpactDose is a program that gets you instant estimate with respect to organ and effective dose values for typical clinical CT scanner models and scan protocols.
You may want to check out more software, such as Hormonal Forecaster, Encyclopaedia Homeopathica or Subliminal Message Flash, which might be related to ImpactDose.