Dosepy 0.6.2

Film dosimetry and gamma analysis for dose distributions in radiotherapy

Welcome to Dosepy

Documentation

Dosepy allows to easily perform film dosimetry and 2D gamma analysis.

The software uses tif images for film dosimetry. A DICOM file exported from a treatment planning system can be used to perform gamma index comparison.

Installation

Install via pip:

pip install Dosepy

Film dosimetry

Dosepy has a graphical user interface to perform film dosimetry. Once a tif file is loaded, scanned films are automatically detected. Multiple scans of the same film can be loaded and averaged automatically for noise reduction.

Gamma index

Dose distributions comparison can be performed using the 2-dimensional gamma index test according to Low's definition Daniel_Low_gamma_1998, as well as some AAPM TG-218 Miften_TG218_2018 recommendations:

• The acceptance criteria for dose difference can be selected in absolute mode (in Gy) or relative mode (in %).
  • In relative mode, the percentage could be interpreted with respect to the maximum dose (global normalization), or with respect to the local dose (local normalization); according to user selection.
• Dose threshold can be adjusted by the user.
• The reference distribution can be selected by the user.
• It is possible to define a search radius as an optimization process for calculation.
• By default, percentile 99 from dose distribution is used as maximum dose. This is used to avoid the possible inclusion of artifacts or user markers.
• Interpolation is not yet supported.

To use a software as a [medical device](https://www.imdrf.org/documents/software-medical-device-samd-key-definitions), it is required to demonstrate its safety and efficacy through a [risk categorization structure](https://www.imdrf.org/documents/software-medical-device-possible-framework-risk-categorization-and-corresponding-considerations), a [quality management system](https://www.imdrf.org/documents/software-medical-device-samd-application-quality-management-system) and a [clinical evaluation](https://www.imdrf.org/documents/software-medical-device-samd-clinical-evaluation); as described in the International Forum of Medical Device Regulators working group guidelines (IMDRF).

Dosepy is currently **under development** to meet quality standards. To achieve this in Mexico the regulatory mechanism is through NOM-241-SSA1-2021, in addition to the IMDRF guidelines.

Discussion

Have questions? Ask them on the Dosepy discussion forum.