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Ultrasound imaging

Introduction In medicine, imaging refers to the method used to view internal organs or structures within the body. There are several modalities used for imaging such as X-ray, CT Scan (computed tomography), MRI (magnetic resonance imaging) and ultrasound machines. Ultrasound was first applied to the human body for medical purposes …

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F18-FDG in Positron Emission Tomography

Introduction Figure 1: PET-CT machine (Source: http://www.radiology-equipment.com/Detail.CFM?LineItemID=1638) PET (Positron Emission Tomography) is an art imaging techniques used in the detection of metabolically active organ or tissues inside body. The concept of emission and transmission tomography was introduced by David E. Kuhl, Luke Chapman and Roy Edwards in the late 1950s. …

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Pregnancy and radiation exposure

Introduction The following article provides public with background information pertaining to reproductive risks of radiation exposures to women who are pregnant and have questions about the risk of birth defects and miscarriage. As general rule, the sensitivity of a tissue to radiation is directly proportional to its rate of proliferation. …

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Medical Radiation Emergency Preparedness

Introduction Ionizing radiation is widely used in medicine, industry, agriculture and research. It provides invaluable benefits. However, radiation sources can be lost, stolen, or otherwise not under proper control, and this can lead to injuries to people who come into contact with them. The usage of radiation for medical purpose …

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Natural Radioactivity In Foods

Radioactivity Radioactive elements (radionuclides) present all around us, including in our daily intake of food and drinks. Radioactive elements will emit radiation during the process by which a nucleus of an unstable atom loses energy. Even though radiation may cause harm to our body, it is important for us to …

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Enviromental Radiation-An Introduction

Monitoring of the environmental radiation (noted as ionizing radiation only will be discussed in this article) is a need and the health effect should be considered. A few worldwide nuclear crises such as Three Miles Island Incident, Goiania Incident, and the latest is the Fukushima-Daiichi Disaster are the lesson learned …

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Safety and Security of Radiation Sources

Definition Radiation safety refers to protection of personnel against harmful effects of ionizing radiation by taking steps to ensure that people will not receive excessive doses of radiation and by monitoring all sources of radiation to which they may be exposed. Radiation safety measures are taken when working with radioactive …

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Cloud Computing in Medical Imaging

Introduction Cloud computing concept was introduced in the 1960s by JCR Licklider. Even though he did not use the term ‘cloud’ but he regarded it as ‘interconnected grid of computers.’ In general, cloud computing is activities of storing and processing data or information on the server that allows data sharing …

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Guide To Radiation Safety For Treatment With Radioactive

Introduction Treatment with radioactive is the most commonly used method not only to treat cancer-related diseases but also used as palliative measures in managing cancer patients. As in general, these radioactive materials will be prescribed to patients either via oral or intravenous injection. However, in some circumstances these radioactive materials …

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Internal Dosimetry in Nuclear Medicine

Introduction Nuclear Medicine is one of the specialized techniques involving the use of radioactive materials in the diagnosis and treatment of certain diseases such as related to thyroid and palliative care. In nuclear medicine therapy, radioactive material combines with other elements to form chemical compounds, or other combined with existing …

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