Dose length product (DLP)

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What is DLP, and how is it calculated?

The dose-length product (DLP) is another type of CT radiation dose parameter. It represents the product of CTDI vol and the craniocaudal (head to toe) dimension of the scan region and is reported in units of mGy-cm [10] . For a specific CT imaging protocol, the DLP can vary from one patient to the next because taller patients may require a longer scan region than shorter patients. As with CTDI, DLP does not represent actual dose absorbed by the patient. In addition, SSDE cannot be multiplied by scan length to produce a modified DLP.

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