IGRT 4D Respiratory Motion Tracking

IGRT 4D Respiratory Motion Tracking is a technique of tracking the position of tumor affected by the respiration.

IGRT Respiratory Gating

IGRT Respiratory Gating is a technique of radiation therapy which determine the radiation delivering moment in the respiratory cycle.

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.

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.