MRI ....
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This document provides information about magnetic resonance imaging (MRI). It begins with an introduction stating that MRI uses magnetic fields and radio waves to produce detailed images of the inside of the body without using ionizing radiation. There are two main types of MRI machines: open MRI, which is more convenient but provides lower quality images, and closed MRI, which fully encloses the patient in a tube. MRI is useful for evaluating conditions like tumors, brain injuries, and heart defects. It has advantages like being non-invasive and avoiding radiation, but also has disadvantages such as being expensive, time-consuming, and difficult for claustrophobic patients.
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Basics of MRI
MRI uses magnetic fields and radio waves to produce detailed images of organs and tissues in the body. It is commonly used to evaluate the chest, abdomen, pelvis, and breasts to diagnose conditions like tumors, heart problems, and liver or kidney diseases. During an MRI exam, the patient lies still inside the machine while images are taken. MRI has benefits over other tests as it does not use radiation and can clearly depict soft tissues, though movement can cause blurred images and certain implants are not compatible.
MRI BRAIN
MRI uses magnets and radio waves to produce diagnostic images of the body's internal structures without using ionizing radiation. It has superior soft tissue contrast compared to CT and allows imaging in multiple planes. Advantages include no radiation exposure, ability to characterize different tissues, and functional imaging. Disadvantages include cost, longer scan time than CT, and incompatibility with metal implants. Patient preparation involves screening for metal implants and providing instructions to remain still during scanning.
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- 1. Magnetic Resonance IMAGING (MRI) Prepared by: Sadikshya subedi Roll no.26 PCL 3rd year
- 2. Content • Introduction • Types of MRI • Indication • Contraindication • Nursing intervention • Advantages • Disadvantages • Summary
- 3. Introduction •MRI (Magnetic Resonance Imaging) is a type of scan that uses strong magnetic fields and radio waves to produce detailed images of the areas inside the body. It is useful in evaluating abdominal soft tissues as well as blood vessels, abscess, fistulas,neoplasms and other sources of bleeding. •MRI is an non-invasive procedure and it utilizes no ionizing radiation that could damages the tissue, but instead it produces images by using a magnetic field and radio waves.
- 5. Types • There are two types of MRI machine: • Open MRI: 0pen MRI is for claustrophobic or overweight individuals, more conveinent type of scanner .But the quality of image is not good as compared to closed MRI. • Closed MRI: It has a largetube surrounded by a magnet where the patient is placed on the sliding table and then slide into the tube.
- 7. Indication • Bone and soft tissue tumors • Cerebral vascular Accident • Hemorrhage • Hearing loss • Visual disturbance • Unexplained Neurological symptoms of deficit • Mappping of brain function • Intracranial diseases and trauma • Congenital heart diseases • Lessions of liver,pancreas and bile ducts
- 8. Contraindication • Metal implants like pacemakers • Pregnant women • Cochlear implants • Allergies to contrast (eg. Gadolinium) • Kidney diseases • Gross obesity • Claustrophobic • Parkinson’s disease
- 9. Nursing Interventions • Take the consent and keep patient NPO for 6-8 hrs before the test. • Explain the procedure to the patient and help to remove all jewellery and other metals. • Its is very important to warn patient may induce feeling of claustrophobia and that the machine makes knocking sound during the procedure. • This procedure is contraindicated in patient with metal implants and who is pregnant. • The entire procedure takes 30 to 90 minutes. • Observe any sign of allergies due to contrast media
- 10. Advantage • It is an non-invasive procedure . • MRI uses no ionizing radiation. • High quality soft tissue contrast resolution • Multi –plan imaging without repositioning the patient. Disadvantage • Expensive compared to other scans. • More time consuming. • Dangerous for people with metallic devices placed within the body. • Slight movement can ruin the images. • Difficult to preform on claustrophobic patients.
- 12. Reference