In recent years, CT and MR imaging are the most widely used techniques, because of their widespread availability and their ability to produce high resolution images of normal anatomic structures and pathological tissues. Magnetic resonance imaging (MRI) is a method used to visualize pathological or other physiological alterations of living tissues and is commonly used for brain tumor imaging because of the following
As a discipline and in the broadest sense, is part of biological imaging and includes radiology uses imaging technology X-ray radiography, magnetic resonance imaging, ultrasound or medical sonography, endoscopy, elastography, imaging touch, thermography, photography and medical imaging techniques functional nuclear medicine as positron emission tomography (PET ) and computed tomography (SPECT). Techniques for measuring and recording, which are not intended primarily to create images, such as electroencephalography (EEG), magnetoencephalography (MEG),
Some advantages of this technique are that there is no radiation involved, it is good at visualizing soft tissue, and that since it can visualize soft tissue so easily it can identify a multitude of different problems. Some disadvantages are that it is time consuming, expensive, and there is extensive training needed to operate it. The last type of imaging technique that will be covered is conventional radiography which can detect foreign bodies and changes or lesions of the skeletal system and is used when the corpse cannot fit into the CT machine. The advantages of this technique are that it is simple, quick, and cost efficient. However, it uses radiation, cannot make three-dimensional reconstructions, has a superimposed image, and it cannot visualize soft tissue
INTRODUCTION X-rays are the oldest and most commonly used form of medical imaging. The X-ray uses a small dose of ionizing radiation to produce photographs of a body’s internal organs and structures. The procedure is quick and painless, and has been done for decades to help doctors diagnose fractured bones, look for injuries or infections, and to locate foreign objects in soft tissue without having to make an incision. HOW DOES AN X-RAY WORK? X-rays are similar to visible light.
Abstract: In Ultrasound images, speckle noise is inherent in medical ultrasound images and it is the cause for decreased resolution and contrast-to-noise ratio. The presence of speckle noise is not attractive as it reduces the image quality and it affects the tasks of individual interpretation and diagnosis. Image variance is a granular noise that exists inherently in Ultrasound image which degrades image quality. Speckle noise reduction is one of the most important processes to enhance the quality of Ultrasound images. Before using the images of the Ultrasound for diagnosis, the first step is to reduce the effect of speckle noise.
ultrasonographyOver the last 10 years, ultrasound has developed into an indispensible tool in anaesthesia and intensive care. Ultrasound is not new to medicine but its use in anaesthesia is. Ultrasound technology is emerging rapidly and the field of anaesthesia is not untouched by its widespread applications. Uses of ultrasound in anaesthesia: Establishing vascular access Regional anaesthesia for nerve blocks Trans-oesophageal echocardiography tool for cardiac imaging Lung imaging Viewing blood flows to rule out deep vein thrombosis and peripheral vascular disease Assessing depth of epidural space in cases of difficult anatomy Role of ultrasound in airway assessment Basic physics: Sound is produced when mechanical energy travels
Thereafter, various types of biopsy tests are carried out on the cells for further verification. These tests are done by cutting a small portion of body cells or tissue. A pathologist (specialized in examining body cells) analyzes the removed portion under a microscope. In some cases, the doctor needs the help of an ultrasound or CT scan to direct the biopsy needle to cut the correct portion of tissue. For some patients, a number of biopsies are needed to get clarification on the tumor.
Abstract- Infrared Thermography (IRT) can be demarcated as the discipline of acquisition and analysis of data from non-contact thermal imaging devices. The method of thermal imaging has simplified over the years with the availability of proficient, high resolution infrared cameras that convert the radiation sensed from the surfaces into thermal images. Thermography literally means 'writing with heat', just as photography implies 'writing with light'. The invisible infrared radiation emitted by bodies is converted into temperature and displayed as thermal images (thermographs). The recent progresses in Thermography and image processing have made the technique a valuable addition to the gamut of non-destructive testing methods.
Mail id:firstname.lastname@example.org Abstract--Medical imaging is used to diagnose or examine the diseases. Diagnostic technologies are usually responsible for acquiring medical images of diagnostic quality. Magnetic Resonance Imaging (MRI) is the imaging
X-ray is a form of electronic-magnetic radiation. The x-ray is when the outer radiation is passed through the body system to show an image. This shows which part or parts of the patient’s body is broken or malfunctioning. In most cases, the information is used by physicians to get an accurate result of the patient's illness on the bones, heart, liver and other organs in the body. The most usual use of x-rays is checking for broken bones, it can check for breast cancer.