Measurements of the dose area product (DLP) acc. to IEC 61223-3-5 and IEC 60601-2-44 can be performed in combination with the NOMEX Dosemeter and the 100 mm or 300 mm long CT ion chamber. For CTDI calculations the CTDI head and/or body phantom is used with the 100 mm CT chamber, which is inserted into one of the five holes of the phantom. The 300 mm long CT chamber is used for dose length product (DLP) measurements free in air. The NOMEX Dosemeter provides an automatic air density correction, for most precise results in computed tomography.