Critical Organs

Critical Organs

 

in radiobiology, the structures, tissues, and organs that cannot be irradiated without leading to a substantial disruption of the vital processes.

The critical organs include the hemopoietic organs, including the bone marrow; the epithelium of the gastrointestinal tract, whose affection may lead to the death of the organism; the crystalline lens of the eye; and the gonads (irradiation of the gonads may cause infertility or produce genetic defects).

References in periodicals archive ?
He will continue to lead the airline's Strategic Planning and Revenue Optimisation teams, which are critical organs that support the airline's commercial success.
An internal ODM internal report exposes decay in the party and heaps blame on the Secretariat and two other critical organs for its diminishing fortunes.
Ramaphosa cannily appointed independent commissions of inquiry and used their findings to fire the leadership at the South African Revenue Service and the National Prosecuting Authority, which were seen as two of the most "captured" critical organs of state.
Gary Leeroy Francis, 49, of Lowerhouses, near Huddersfield, died from hypovolemia - a condition where the blood pressure is reduced in a major way so critical organs can't function.
According to him, 'Because of what they have in stock, their nefarious plans to thwart the will of the people in the forthcoming general election, they want to raise the level of the intimidation of all critical organs of democracy, the legislature, the Judiciary including but not limited to the fourth estate of the realm.
This would help in making these critical organs more efficient,' added Mr Manda.
Since the late 1980s, radiation therapy was considered the standard of care for patients with lung cancer.[1] Although radiation is beneficial at killing the tumor cell, it is harmful at detriment of the healthy organ.[2] An ideal practice of radiotherapy involves optimization of treatment plans to maximize the radiation dose to the tumor and minimize the dose to the critical organs and structures around the tumor.[3] Unfortunately, this is often impossible in radiotherapy due to the anatomic distribution and the limitation of the beam delivery.
MRIdian Linac's cutting-edge accelerator incorporates MRI visualisation, offering real-time imaging that defines the targeted tumour from the surrounding soft tissue and other critical organs allowing for more precise radiation treatment and daily patient treatment plan modification.
Besides critical organs such the heart, kidneys, liver stem cells are highly sought after as treatment for otherwise untreatable diseases.
By better shaping the tumor dose it can further reduce dose to critical organs. In addition, arc therapy technique increases the robustness of the treatment plan, and may further improve the adoption of dose escalation and hypo-fractionation.
The rate of major bleeding events was 3.1% among patients on rivaroxaban plus aspirin and 1.9% in those who received aspirin only, a 51% relative increase among patients on the dual regimen, but the results showed no statistically significant increase in the rates of fatal bleeds, intracerebral bleeds, or bleeding in other critical organs.
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