Researchers from The University of Texas MD Anderson Cancer Center have demonstrated that adding metastasis-directed radiation therapy to standard-of-care chemotherapy improved progression-free survival (PFS) in patients ...
Aug 5, 2024
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As patients with lung cancer live longer, the risk of long-term cardiac side effects of radiation therapy has been increasing, despite advances that reduce the radiation dose to the heart. New research uses machine learning ...
Jun 27, 2024
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Results from a new study led by researchers at The University of Texas MD Anderson Cancer Center support standard use of the more precise intensity-modulated radiotherapy (IMRT) over the alternative 3D-conformal radiotherapy ...
Jun 27, 2024
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Biomedical engineer Abhinav Jha, assistant professor in the McKelvey School of Engineering and of radiology at Mallinckrodt Institute of Radiology in the School of Medicine, both at Washington University in St. Louis, has ...
Jun 13, 2024
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A new ultra-low dose imaging method used with long axial field-of-view PET scanners can obtain images with a historically low radiopharmaceutical dose—more than 50 times lower than the standard effective dose. Furthermore, ...
Jun 11, 2024
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A new study identified a set of 140 genes that may help predict enhanced disease-free survival in patients with non-small cell lung cancer (NSCLC) treated with a combination of immunotherapy and low-dose radiation. The results, ...
Feb 23, 2024
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An innovative breast imaging technique provides high sensitivity for detecting cancer while significantly reducing the likelihood of false positive results, according to a study published in Radiology: Imaging Cancer. Researchers ...
Feb 9, 2024
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Scientists at Nottingham Trent University wanted to investigate the anti-cancer properties of carnosine against cells derived from both primary and metastatic prostate cancer—where the cancer began and where it had spread ...
Jan 5, 2024
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Nearly half of all cancer patients undergo radiation therapy as part of their care. Ionizing radiation, or the emission of high-energy waves or particles, works as a therapy by damaging a cancer cell's DNA. It's an effective ...
Jan 4, 2024
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Joe Vipond, a Canadian emergency room physician who was a strong supporter of masking during the pandemic, said in a speech last year that the slow recognition that COVID-19 is spread by airborne transmission resulted in ...
Dec 5, 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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