Treatment FAQ

the bentley-milan algorithm is an example of which type of treatment planning algorithm

by Lea Funk MD Published 3 years ago Updated 3 years ago

Correction-based systems apply correction factors to existing measured reference dose distribution data. A simple example of this approach is the data-driven Milan and Bentley (1974) system, developed in 1974.

What is Milan-Bentley algorithm?

The Milan-Bentley algorithm was one of the first models of this type and is still in use today in some planning systems. This algorithm is also frequently used as the method of point dose checking on an independent system.

What is Bentley-Ottmann algorithm?

In order to efficiently maintain the intersection points of the sweep line L with the input line segments and the sequence of future events, the Bentley–Ottmann algorithm maintains two data structures :

What is the future event in the Bentley Ottmann algorithm?

In the Bentley–Ottmann algorithm, the potential future events consist of line segment endpoints that have not yet been swept over, and the points of intersection of pairs of lines containing pairs of segments that are immediately above or below each other.

What is the history of the heterometric algorithm?

The algorithm was initially developed by Jon Bentley and Thomas Ottmann ( 1979 ); it is described in more detail in the textbooks Preparata & Shamos (1985), O'Rourke (1998), and de Berg et al. (2000).

Which type of IMRT treatment involves the sliding window technique?

Aim. We compared the intensity modulated radiotherapy (IMRT) plans delivered with the sliding window (SW IMRT) and step and shoot (SS IMRT) techniques.

What is CCC algorithm?

In the CCC algorithm, the kernel is represented analytically and expressed in polar coordinates, which consist of a finite number of polar angles for the primary beam.

What is FSD in radiotherapy?

[*A frequently used alternative term for the 'focus to skin distance' ( FSD ) is the 'source to skin distance' ( SSD ).] 4.4. Manual calculation of the 'depth dose' The radiation dose that is prescribed by the oncologist is the dose to the point of treatment.

What is cobalt 60 radiation therapy?

Cobalt therapy is the medical use of gamma rays from the radioisotope cobalt-60 to treat conditions such as cancer. Beginning in the 1950s, cobalt-60 was widely used in external beam radiotherapy (teletherapy) machines, which produced a beam of gamma rays which was directed into the patient's body to kill tumor tissue.

What is SSD and sad technique in radiotherapy?

Modern photon beam radiotherapy is carried out with a variety of beam energies and field sizes under one of two set-up conventions: a constant source to surface distance (SSD) for all beams or an isocentric set-up with a constant source to axis distance (SAD).

What type of radiation is IMRT?

Overview. Intensity-modulated radiation therapy (IMRT) is an advanced type of radiation therapy used to treat cancer and noncancerous tumors. IMRT uses advanced technology to manipulate photon and proton beams of radiation to conform to the shape of a tumor.

What is isodose planning?

An isodose plan is a graphic display of patient's anatomy to include the distribution of radiation based on a prescribed dose and plan of care created by a radiation oncologist.

What type of radioactive decay does cobalt-60 undergo?

betaCobalt-60 decays by beta and gamma emission to non-radioactive nickel. Most of the radiation from the decay of cobalt- 60 is in the form of gamma emissions; some is in the form of beta particles. Beta particles are generally absorbed in the skin and do not pass through the entire body.

What is radioactive cobalt used for?

What is it used for? Co-60 is used medically for radiation therapy as implants and as an external source of radiation exposure. It is used industrially in leveling gauges and to x-ray welding seams and other structural elements to detect flaws.

What is the difference between cobalt and cobalt-60?

cobalt-60, radioactive isotope of cobalt used in industry and medicine. Cobalt-60 is the longest-lived radioactive isotope of cobalt, with a half-life of 5.27 years. It is produced by irradiating the stable isotope cobalt-59 with neutrons in a nuclear reactor.

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