# Parametric maps `dcmqi` provides command line tools to convert results of post-processing of the image data, such as by applying certain model to the data, into DICOM format. As an example, Apparent Diffusion Coefficient (ADC) maps derived by fitting various models to the Diffusion-Weighted Magnetic Resonance Imaging (DW-MRI) data have been shown promising in characterizing aggressiveness of prostate cancer. The result of conversion is [DICOM Parametric map object](http://dicom.nema.org/medical/dicom/current/output/chtml/part03/sect_A.75.html). Mandatory metadata that needs to be specified to enable conversion include: * Quantity being measured * Units of the quantity being measured * Measurement method Each of these items, in addition to some other attributes, must be specified using coded values. An example of the metadata file is available [here](https://github.com/QIICR/dcmqi/blob/master/doc/examples/pm-example.json). --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://qiicr.gitbook.io/dcmqi-guide/opening/cmd_tools/dicom-parametric-map-support.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.