Contouring atlas for radiotherapy planning

1. What is radiotherapy contouring?
2. How do you contour great vessels?
3. Which method of automated contouring is more efficient?
4. Where are the tattoos placed for prostate radiation?
5. What are the 5 R's of radiotherapy?
6. What are the 4 main great vessels?
7. What are the 5 great vessels?
8. Which software is used for contouring?
9. What are the methods of plotting contour?
10. What is the procedure of direct method of contouring?
11. What are the two types of radiotherapy?
12. What is a radiotherapy planning CT scan?
13. What does radiation therapy do to breast tissue?
14. Which radiation therapy is best?
15. What is the most common radiation used in radiotherapy?
16. What is the first step in the treatment planning in radiation therapy?
17. What is the latest technology for radiotherapy?
18. Which of the following is the most common imaging modality for radiotherapy planning?

What is radiotherapy contouring?

Contour delineation is a crucial treatment planning process that involves outlining target(s) and organs at risk (OARs) to guide radiation therapy plans that optimize tumor control and reduce radiation toxicity.

How do you contour great vessels?

The great vessel should be contoured starting at least 3 cm above the superior extent of the PTV and continuing on every CT slice to at least 3 cm below the inferior extent of the PTV. For right sided tumors, SVC will be contoured, and for left sided tumors, the aorta will be contoured.

Which method of automated contouring is more efficient?

Abstract. Fully or semi-automatic contouring tools are increasingly being used in the tumor contouring task for radiotherapy. While the fully automatic contouring tools have not reached sufficient efficiency, the semi-automatic contouring tools balance more effectively between the human interaction and automation.

Where are the tattoos placed for prostate radiation?

The measurements from your CT scan will be used to plan your treatments. As the last step, your Radiation Therapists will give you 3 small tattoo marks on your pelvis (one on each hip and one on the front of your pelvis). These marks are approximately the size of a pen tip.

What are the 5 R's of radiotherapy?

In conventional radiotherapy (RT), the relative biologic effectiveness of radiation is influenced by radiobiological determinants, the so-called '5Rs': Repair, Repopulation, Redistribution, Reoxygenation, and Radiosensitivity.

What are the 4 main great vessels?

The great vessels of the heart include your aorta, pulmonary trunk, pulmonary veins and vena cava (superior and inferior).

What are the 5 great vessels?

The large arteries and veins directly connected with the heart are termed the great vessels, consisting of the inferior vena cava, superior vena cava, pulmonary arteries, pulmonary veins, and root of the aorta.

Which software is used for contouring?

Overview. Ezicontour is an integrated Windows based program designed for anyone that needs to produce contour plans and/or simple maps.

What are the methods of plotting contour?

There are two methods of contour surveying: Direct method. Indirect method.

What is the procedure of direct method of contouring?

In the direct method, the contour to be plotted is actually traced on the ground. Points which happen to fall on the desired contour are only surveyed, plotted and finally joined to obtain the particular contour.

What are the two types of radiotherapy?

There are two main types of radiation therapy, external beam and internal. The type of radiation therapy that you may have depends on many factors, including: the type of cancer. the size of the tumor.

What is a radiotherapy planning CT scan?

A radiotherapy planning CT scan is slightly different to a regular diagnostic CT scan. It allows radiographers to obtain 3D images of the area being treated in order to create individualised radiotherapy plans. The scan itself will normally take between 10 to 15 minutes.

What does radiation therapy do to breast tissue?

Changes in the shape, size, and feel of the breast

In time radiotherapy can cause the breast tissue to change shape or shrink in size a little. This can happen to your natural breast tissue or a reconstructed breast. After radiotherapy, the breast might feel hard and less stretchy.

Which radiation therapy is best?

External beam radiation therapy (EBRT) is the most common type of radiotherapy. With EBRT, a machine directs beams of high-energy radiation toward the tumor. The energy may be X-rays (most common), electrons or protons. Precision is vital with EBRT.

What is the most common radiation used in radiotherapy?

Radiation therapy most often uses X-rays, but protons or other types of energy also can be used. The term "radiation therapy" most often refers to external beam radiation therapy.

What is the first step in the treatment planning in radiation therapy?

Consultation is the first step of the radiation therapy process. This involves an appointment with a radiation oncologist, who reviews a patient's medical records, pathology reports and radiology images and performs a physical examination.

What is the latest technology for radiotherapy?

Stereotactic Body Radiation Therapy (SBRT)

SBRT is a new EBRT technique that is made possible by improved radiation accuracy and improved therapeutic ratios for many tumor sites.

Which of the following is the most common imaging modality for radiotherapy planning?

CT scans are the standard imaging modality for radiotherapy planning, as they provide a three-dimensional (3D) view of the tumour as well as data regarding electron density, which are required for dose calculations.