Dose measured at 0.007 cm or 7 mg/cm2 is called?

• A. Deep Dose Equivalent
• B. Shallow Dose Equivalent
• C. Whole Body Dose
• D. Lens Dose Equivalent

Answer: (B)

The important idea is that external-dose quantities are defined at specific tissue depths. A depth of 0.007 cm (which is 70 micrometers) is a very shallow skin depth, and the dose measured there represents the skin’s exposure. This particular quantity is called the shallow dose equivalent, and it uses the 7 mg/cm2 metric to reflect dose to the superficial skin layers.

Other options refer to different depths or to whole-body exposure: deep dose equivalent is intended for deeper tissues (roughly around 1 cm into the body), lens dose equivalent is for the eye lens at about 0.3 cm depth, and whole body dose isn’t tied to a shallow skin-depth measurement.