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A bone scan or bone scintigraphy / s ɪ n ˈ t ɪ ɡ r ə f i / is a nuclear medicine imaging technique used to help diagnose and assess different bone diseases. These include cancer of the bone or metastasis, location of bone inflammation and fractures (that may not be visible in traditional X-ray images), and bone infection (osteomyelitis).
Level 3 techniques such as IMRT and VMAT utilise inverse planning to provide further improved dose distributions (i.e. better coverage of target tumours and sparing of healthy tissue). [5] [6] These methods are growing in use, particularly for cancers in certain locations which have been shown to derive the greatest benefits. [7] [8]
Late systemicarterial phase Sometimes also called "arterial phase" or "early venous portal phase" 35-40 sec: 15-20 sec All structures that get their blood supply from the arteries have optimal enhancement. Some enhancement of the portal vein; Pancreatic phase 30 [8] or 40 [9] - 50 [9] sec: 20-30 sec Pancreatic cancers become hypodense compared ...
FIGURE 5. Selected images form CT performed using a Cholangiocarcinoma specific protocol. 5a is a portal venous phase image demonstrating a single low attenuation mass which does not appear to enhance. 5b is a 15 minute delayed image which demonstrates delayed enhancement of the liver mass (arrow) characteristic of Cholangiocarcinoma.
Coronary CT angiography (CTA or CCTA) is the use of computed tomography (CT) angiography to assess the coronary arteries of the heart.The patient receives an intravenous injection of radiocontrast and then the heart is scanned using a high speed CT scanner, allowing physicians to assess the extent of occlusion in the coronary arteries, usually in order to diagnose coronary artery disease.
[162] [163] [164] One study estimated that as many as 0.4% of cancers in the United States resulted from CT scans, and that this may have increased to as much as 1.5 to 2% based on the rate of CT use in 2007. [148] Others dispute this estimate, [165] as there is no consensus that the low levels of radiation used in CT scans cause damage. Lower ...
Updated October 23, 2024 at 3:24 PM The Food and Drug Administration announced a Class II recall for more than 7,000 bottles of an antidepressant due to a chemical. The recall was initiated ...
An IB is intended to provide the investigator with insights necessary for management of study conduct and study subjects throughout a clinical trial. An IB may introduce key aspects and safety measures of a clinical trial protocol, such as: Dose (of the study drug) Frequency of dosing interval; Methods of administration; Safety monitoring ...