Magnetic resonance imaging

Article Abstract:

MRI has been used to diagnose musculoskeletal disorders as well as tumors that have invaded soft tissue. It is less useful in diagnosing diseases in the chest and abdomen. It can be used to stage tumors in the kidneys, uterus and cervix, but is less useful in staging prostate cancer. Mammography is still the cheapest method of screening for breast cancer, but MRI can detect leaks from breast implants. MRI angiography may be useful in detecting carotid artery disease and may replace X-ray angiography. MRI can complement Doppler ultrasound and echocardiography in detecting various heart diseases. It may be useful in measuring blood flow through blood vessels and capillaries. The average cost of an MRI scan in 1990 was $950. The high cost is a result of the large, strong magnets and complicated electronics needed. However, MRI could reduce costs by replacing expensive techniques such as arthroscopy and reducing hospital stays.

Joint diseases

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Magnetic resonance imaging

Article Abstract:

Magnetic resonance imaging (MRI) may be an effective method for diagnosing disorders affecting the central nervous system and other organ systems. MRI involves detecting the positively charged nucleus of the hydrogen atom, which is abundant in body fluids and tissues. The image that results is a composite of different localized signal intensities. MRI angiograms, or MRI images of blood vessels, involve detecting blood flow. Contrast agents that contain magnetically active substances are sometimes used to image certain types of tissue. Certain clinical guidelines may help determine which patients should undergo MRI. MRI may be more effective than computed tomography (CT) for imaging different disorders affecting the central nervous system, including strokes, tumors, infections and congenital abnormalities. MRI has also displaced myelography as the imaging method of choice for detecting many disorders of the spinal cord.

Usage, Central nervous system

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A preliminary report comparing magnetic resonance coronary angiography with conventional angiography

Article Abstract:

Magnetic resonance imaging (MRI) coronary angiography may be an effective method for evaluating coronary arteries. Traditional coronary angiography is an invasive procedure that involves cardiac catheterization, but MRI coronary angiography is a non-invasive procedure. A study examined the sensitivity and specificity of MRI coronary angiography in comparison to traditional coronary angiography for imaging four major coronary arteries in 39 men between 33 and 84 years old. The sensitivity of MRI coronary angiography was 90% for imaging coronary arteries with narrowing of 50% or more, and the specificity was 92%. The sensitivity and specificity of MRI coronary angiography varied depending on the artery that was being imaged. The highest sensitivity and specificity of MRI coronary angiography was 100% for the left main coronary artery.

Innovations, Coronary arteries, Angiocardiography

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