# Frequently asked questions

## General

### How do I cite pydicom?

The easiest method is probably to find the Zenodo DOI for the version you are using and then entering your required citation style in the Cite as box.

Alternatively, you can use something along the lines of:

    Mason, D. L., et al, pydicom: An open source DICOM library, https://github.com/pydicom/pydicom [Online; accessed YYYY-MM-DD].

## Installation

### What are pydicom’s prerequisites?

#### Required

pydicom requires Python.

#### Optional

When manipulating Pixel Data it’s recommended you install NumPy. When dealing with compressed Pixel Data see this table for which libraries are required.

### What version of Python can I use?

pydicom version | Release date | Python versions
--- | --- | ---
1.0 | March 2018 | 2.7, 3.4, 3.5, 3.6
1.1 | June 2018 | 2.7, 3.4, 3.5, 3.6
1.2 | October 2018 | 2.7, 3.4, 3.5, 3.6
1.3 | July 2019 | 2.7, 3.4, 3.5, 3.6
1.4 | January 2020 | 2.7, 3.5, 3.6, 3.7, 3.8
2.0 | May 2020 | 3.5, 3.6, 3.7, 3.8
2.1 | November 2020 | 3.6, 3.7, 3.8, 3.9
2.2 | August 2021 | 3.6, 3.7, 3.8, 3.9
2.3 | March 2022 | 3.6, 3.7, 3.8, 3.9, 3.10
2.4 | June 2023 | 3.7, 3.8, 3.9, 3.10, 3.11
3.0 | ~September 2024 | 3.10, 3.11, 3.12

## What license does pydicom use?

pydicom has an MIT-based license.