NPL scientists have worked on a range of projects that are set to significantly improve the accuracy of a type of radiotherapy treatment called proton beam radiotherapy. The benefits of this therapy include more precise targeting ...
Sep 1, 2023
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Prolonged exposure to low-dose ionizing radiation is associated with a higher risk of death from cancer than previously thought, suggests research tracking the deaths of workers in the nuclear industry, published in The BMJ.
Aug 16, 2023
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In 2020, breast cancer was the most commonly diagnosed form of cancer worldwide, with more than 2 million cases. In women, it accounts for about a quarter of all cancer cases and is responsible for 15.5% of cancer-related ...
Jul 19, 2023
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New CT technology allows for a comprehensive, simultaneous evaluation of lung structure and function, something not possible with standard CT, according to a study published in Radiology, a journal of the Radiological Society ...
Jul 13, 2023
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Polynesians exposed to fallout from France's nuclear tests in the South Pacific have a slightly increased risk of developing thyroid cancer, a study suggested on Monday that used declassified military data for the first time.
May 15, 2023
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For children under age 18 years, a single computed tomography (CT) scan is not associated with an increased risk of brain tumours, leukemia or lymphoma, but exposure to 4 or more scans before adulthood more than doubles the ...
Apr 24, 2023
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Gastric cancer is one of the most common cancers worldwide. A new invention by researchers from the National University of Singapore (NUS) could help improve the treatment of this cancer by enhancing the precision of radiotherapy, ...
Apr 14, 2023
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Cherenkov imaging is a valuable cancer treatment tool that can help doctors track and monitor radiation doses received by tissues during cancer therapy in real time. This imaging technique works by detecting Cherenkov radiation, ...
Mar 13, 2023
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Only one in 100,000 people suffer from a pheochromocytoma, a tumor of the adrenal gland. If the tumor has already metastasized, a radioactive compound can be used to detect malignant cells that have spread to other parts ...
Feb 9, 2023
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On January 12 a truck pulled out of Rio Tinto's Gudai-Darri iron ore mine in the Pilbara region of Western Australia and drove 1,400km south to Perth, arriving on January 16.
Jan 30, 2023
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Absorbed dose (also known as total ionizing dose, TID) is a measure of the energy deposited in a medium by ionizing radiation. It is equal to the energy deposited per unit mass of medium, and so has the unit J/kg, which is given the special name Gray (Gy).
Note that the absorbed dose is not a good indicator of the likely biological effect. 1 Gy of alpha radiation would be much more biologically damaging than 1 Gy of photon radiation for example. Appropriate weighting factors can be applied reflecting the different relative biological effects to find the equivalent dose.
The risk of stochastic effects due to radiation exposure can be quantified using the effective dose, which is a weighted average of the equivalent dose to each organ depending upon its radiosensitivity.
When ionising radiation is used to treat cancer, the doctor will usually prescribe the radiotherapy treatment in Gy. When risk from ionising radiation is being discussed, a related unit, the sievert is used.
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