What is Icru 38?
Abstract. The purpose is to compare CT-based dosimetry with International Commission on Radiation Units and Measurements (ICRU 38) bladder and rectum reference points in patients of carcinoma of uterine cervix treated with intracavitary brachytherapy (ICA).
What Icru 62?
ICRU Report 62 provides recommendations on the volumes and absorbed doses that are important in prescribing, recording and reporting photon beam therapy, utilizing the new and improved irradiation techniques that have become available since the publication of ICRU Report 50 in 1993.
What is ICRU Reference point?
The ICRU Reference Point criteria are: “(1) the dose to the point should be clinically relevant; (2) the point should be easy to define in a clear and unambiguous way; (3) the point should be selected so that the dose can be accurately determined; (4) the point should be in a region where there is no steep dose …
What does Icru stand for?
International Commission on Radiation Units and Measurements
The International Commission on Radiation Units and Measurements (ICRU) is a standardization body set up in 1925 by the International Congress of Radiology, originally as the X-Ray Unit Committee until 1950.
What is total Reference Air Kerma?
The total reference air kerma (TRAK) is the sum of the products of the Reference Air Kerma Rate and the irradiation time for each source. It is directly proportional to the integral dose to the patients.
What is Reference Air Kerma?
It is a surrogate measure of the amount of energy delivered to the patient. 12. RAK (also known as reference dose, cumulative dose, or cumulative dose at a reference point) is the air kerma accumulated at a specific point in space (the patient entrance reference point) relative to the fluoroscopic gantry.
What is PTV CTV and GTV?
This target volume is subdivided into several subsets: the gross tumour target volume (GTV), the clinical target volume (CTV) and the planning target volume (PTV). The GTV and CTV have a biological background.
What is ITV in radiotherapy?
ITV (internal target volume) and PTV (planning target volume) Once the CTV(s) have been defined, in external beam radiation treatment, a suitable arrangement of radiation beam(s) must be selected to achieve an acceptable dose distribution.
What is radiotherapy hotspot?
The region in a radiation/contamination area where the level of radiation/contamination is significantly greater than in neighboring regions in the area.
When was Icru established?
The ICRU (originally known as the International X-Ray Unit Committee and later as the International Committee for Radiological Units) was conceived at the First International Congress of Radiology (ICR) in London in 1925 and officially came into being at ICR-2 in Stockholm in 1928.
When did Icru adopt SI units?
ICRU, which is primarily concerned with the physical aspects of radiation, and the International Commission on Radiological Protection (ICRP), which is primarily concerned with the biological effects of radiation and radiation protection, adopted and recommended the exclusive use of the SI units for radiation …
What is TRAK in brachytherapy?
Total Reference Air Kerma (TRAK) is defined as the integral of the reference air-Kerma rate at a reference distance from the source over the treatment period. Reporting of TRAK as one of the treatment parameters is highly recommended in gynecological brachytherapy.