Advantages And Disadvantages Of Medical Imaging
II. MEDICAL IMAGE COMPRESSION
A. Image
An image is an array, or a matrix, of square pixels arranged in columns and rows. Images may be black and white colour, 2-D, 3- D, high pixel, low pixel, etc. An image consists of a rectangular array of dots called pixels. The size of the image is given as width X height, in numbers of pixels. Resolution is usually measured in terms of DPI[3]. Though the images taken from a camera is in the analog form, for processing, transmitting and storage, images are to be converted in to digital form. Different types of images used in various fields like remote sensing, video processing, medical fields, biometric, satellite imaging techniques which require compression for transmission and storage.
B. Medical Images
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Today, this ability to achieve information about the human body has many useful clinical applications. Over the years, different sorts of medical imaging have been developed, each with their own advantages and disadvantages. X-ray based methods of medical imaging include conventional X-ray, computed tomography (CT) etc. Other types of medical imaging are magnetic resonance imaging (MRI) and ultrasound imaging. Unlike conventional X-ray, CT, MRI and ultrasound operate without ionizing radiation. MRI uses strong magnetic fields, which produce no known irreversible biological effects in humans. Diagnostic ultrasound systems use high-frequency sound waves to produce images of soft tissue and internal body organs.
III. DIFFERENT TYPES OF MEDICAL IMAGES
There are several methods of medical imaging – each uses different technology to create a different type of image. The types of images differ in how well they show what is happening in certain body tissues (Ex. bone, soft tissue or tumours)
A.
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