Some types of volume in oncology

The volume of patient interested in the oncology is the region that we considered in the therapy. There are some types of volume in oncology.

1. PTV. PTV - Planning Tumor Volume (GTV <= CTV <= PTV). That is the region of tumor that we make a plan of therapy.
2. CTV. CTV - Clinical Tumor Volume (GTV <= CTV <= PTV). That is the region of tumor that is detected in clinic.
3. GTV. GTV - Gross Tumor Volume (GTV <= CTV <= PTV). That is the real (approximating) region of tumor of the patient.
4. Treated Volume. That is the region that we isolate for treatment.
5. Irradiated Volume. That is the region that we are irradiated. In this region, we need an enough dose to destroy the tumor.
6. Organ. That is the region representing organs of patient. This region is so sensible with the radiation. We need an minimal dose of radiation on this region.

Normalement, each computer-aided therapy software  supports all these volumns. Because, they are basic volumes considered in the oncology.

Demons : a non-rigid deformable registration

Demons is a method of non-rigid deformable registration.

The basic idea of Demons is to use the sum of square difference (SSD) of intensity for deforming image. Demons uses optical flow to calculate forces on the each point of image. The force proposed by Thirion corresponds to a second order gradient descent on SSD criterion.

List of medical imaging library

Medical imaging programmation is useful for biomedical informatic. In this page, we list the programming library used in biomedical research.

List of medical visualisation software

This page displays a list of medical visualisation software:

• MedINRIA MedINRIA is a free collection of softwares developed within the Asclepios research project. It aims at providing to clinicians state-of-the-art algorithms dedicated to medical image processing and visualization
• VR-Render is a software of IRCad.
• ParaView. ParaView is an open-source, multi-platform data analysis and visualization application. ParaView users can quickly build visualizations to analyze their data using qualitative and quantitative techniques. The data exploration can be done interactively in 3D or programmatically using ParaView's batch processing capabilities.

List of medical imaging software is presented in the following website http://www.idoimaging.com/. It's a good summary.

Some main steps for creating a treating plan in oncology

Some main steps for creating a treating plan in oncology.

Some software provides some different steps for constitute a treating plan. In this article, I will mention some principal steps:

Construction of patient profile.
The information of the patient is stored in a patient information server. Each software want to use a patient profile, it connects to the server and get the expected profile. In each patient profile, we attach each model. Each model contains the basic information about the patient and CT or MR, etc image serie.

Test deformation with ITK v4.0rc02.

The imaging registration is an important step in the medical imaging. In there, the deformable registration is a difficult subject. In this article, I show some results of deformable registration implemented in the Itk 4.0.