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Special views focusing on the orbit of the eye may be taken to investigate concerns relating to the eye. [8] CT scans are used by physicians specializing in treating the eye (ophthalmologists) to detect foreign bodies (especially metallic objects), fractures, abscesses, cellulitis, sinusitis, bleeding within the skull (intracranial bleeding), proptosis, Graves disease changes in the eye, and ...
Nose bleeds, Headaches, Blocked sinus, Diplopia, [1] Risk factors: Exposure to wood dust or nickel dust, and leather, Tobacco use, Alcohol Consumption [2] ， Diagnostic method: Head and neck X-ray, Computed Tomography Scan, Magnetic resonance imaging, Physical examination: Treatment: Surgery, Radiation Therapy, Chemotherapy, Neck dissection
1) Discovery of the location of the Maxillary Sinus with greater accuracy. 2) A general improvement in safety of the procedure. 3) The ability to obtain cultures at the time of lavage, when clinically warranted or indicated by CT-scan evidence. 4) Avoiding the need for exposure to radiation, as fluorescence is used in its stead.
The radiation used in CT scans can damage body cells, including DNA molecules, which can lead to radiation-induced cancer. [148] The radiation doses received from CT scans is variable. Compared to the lowest dose X-ray techniques, CT scans can have 100 to 1,000 times higher dose than conventional X-rays. [149]
Radiation hormesis is the conjecture that a low level of ionizing radiation (i.e., near the level of Earth's natural background radiation) helps "immunize" cells against DNA damage from other causes (such as free radicals or larger doses of ionizing radiation), and decreases the risk of cancer. The theory proposes that such low levels activate ...
Radiation therapy is the most common form of treatment. There are different forms of radiation therapy, including 3D conformal radiation therapy, intensity-modulated radiation therapy, particle beam therapy, and brachytherapy, which are commonly used in the treatment of cancers of the head and neck. Most people with head and neck cancer who are ...
The computed tomography dose index (CTDI) is a commonly used radiation exposure index in X-ray computed tomography (CT), first defined in 1981. [1] [2] The unit of CTDI is the gray (Gy) and it can be used in conjunction with patient size to estimate the absorbed dose.
The ionizing radiation used in CT scans can lead to radiation-induced cancer. [13] Age is a significant factor in risk associated with CT scans, [14] and in procedures involving children and systems that do not require extensive imaging, lower doses are used. [15]