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Diagnostic Imaging

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  • 1. Diagnostic Imaging By: Carmen Ortiz
  • 2. Cardiac scans
  • 3. Ct or Cat Scans
    • Different types of CT scans (ex. MDCT, EBCT, and ) vary from case to case.
    • Universal Purpose
    • 1.) A test that is painless that utilizes an x-ray machine to take detailed pictures of the heart.
    • 2.) Used to search for problems in the heart.
    • Procedure
    • 1.) An x-ray machine moves around a person’s body in a circle, as it takes pictures of each part of your heart.
    • 2.) A computer then puts pictures together to make a three dimensional view of your heart.
    • 3.) A times a dye or a radioactive tracer might be injected into a blood vessel. The dye or tracer (thallium) then travels through the blood vessels and highlights them for the x-ray pictures.
  • 4.
    • Downside
    • 1.) Cardiac CT involves radiation due to the x-rays and tracer.
    • 2.) The radiation exposure is said to be considered small and similar to the amount of radiation a person will be normally be exposed to in three years.
    • 3.) In contrast, though according to a new study, exposure varies from hospital to hospital but the average dose of a single scan is equivalent to about 600 traditional chest x-rays.
    • Upside
    • 1.)New cardiac methods are now available to reduce the amount of radiation being used.
  • 5. CT scans are used to diagnose
    • Coronary Heart Disease
    • Problems with:
    • 1.) Coronary arteries
    • 2.) Heart
    • 3.) Heart valves
    • 4.) Aorta (aneurysm and dissection)
    • 5.) Blood clots
    • 6.) Pulmonary veins
    • 7.) Pericardium
  • 6. Doppler Ultasonography
  • 7. Doppler Ultrasonography
    • Purpose
    • 1.) To detect direction, speed and obstacles of blood flow.
    • Procedure
    • 1.) A technician will apply gel to the skin.
    • 2.) Then place the transducer (a device that converts electrical signals into ultrasound waves and ultrasound waves back into electrical impulses) against the skin in various angles.
    • 3.) The electrical impulses are measurements of sound wave echoes as they bounce of tissues and organs.
    • 4.) The electrical impulses are then sent to a monitor, that shows the organ being studied and records it for study.
  • 8. Doppler ultrasonography is used to diagnose:
    • Problems with blood flow in blood vessels.
    • 1.) Blood clots
    • 2.) Thromboses
    • 3.) Velocity of blood.
    • Upside
    • 1.) Prevents possible heart attacks.
    • 2.) Harmless, painless and widely available.
    • 3.) Does not utilize x-rays.
    • 4.) It is noninvasive
  • 9. Echocardiography
  • 10. Echocardiography
    • Purpose
    • To visualize internal cardiac structures.
    • Procedure
    • 1.) A transducer is placed on your ribs near the breast bone and directed toward the heart. At times near your left nipple, which is located near the apex of your heart.
    • 2.) The transducer picks up the echoes of the sound waves and transmits them as electrical impulses.
    • 3.) The electrical impulses produce moving images of a beating heart and its structures.
    • 4.) A doppler probe records the motion of the blood through the heart.
    • 5.) At times the heart might be obstructed and liquid might be inserted into the heart to get a better view.
  • 11. Echocardiography used to diagnose and monitor
    • 1.) Heart murmurs
    • 2.) Abnormal heart valves
    • 3.) Damage to the heart muscle in patients who have had heart attacks
    • 4.) Pericarditis
    • 5.) Source of a blood clot embolism
    • 6.) Congenital heart disease
    • 7.) Atrial fibrillation
    • 8.) Pulmonary hypertension
    • Upside
    • 1.) Usually noninvasive
  • 12. Works Cited
    • National Heart and Lung Institute. Nov2009 www.nhlbi.nih.gov/health/dci/Diseases/ ct / ct _whatis.html .
    • The Free Dictionary http://medical-dictionary.thefreedictionary.com/Doppler+ultrasonography .
    • Medline Plus.25 January 2010. http://www.nlm.nih.gov/medlineplus/ency/article/003869.htm .
    • Wikipedia
    • Medical Terminology “A living Language”.

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