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Cardiomyopathy: Tomography, MRI of the Heart, What will Show?

In examining patients with cardiomyopathy, various imaging techniques are used to determine the form of the disease, the severity of heart damage. This is magnetic resonance imaging or conventional computed tomography, the study of coronary arteries with contrast, as well as a specific stress test using thallium, a labeled isotope. A sleep study in the lab with polysomnography is also shown. Why is all this necessary?

Thallium Stress Tests: A Heart Exam

Many patients with dilated or restrictive cardiomyopathy can undergo a cardiac stress test with thallium to assess how well the heart is supplied with blood, how effective the ventricles or atria are. This information is used to decide the best way to treat patients.

Magnetic resonance imaging (MRI) for cardiomyopathy

MRI uses strong magnetic fields and radio waves instead of radiation to create three-dimensional images and two-dimensional cross-sections of the heart. Images created with magnetic resonance imaging, similar to x-rays, but show more detailed information about the soft tissues of the body.

Magnetic resonance imaging is performed in a large tube by MRI Scan Centres in Noida that is wide enough to accommodate a patient lying on a couch. Radio waves and strong magnetic fields are generated inside the shell of the tube and directed towards the body during magnetic resonance imaging. The body reacts by emitting weak energy signals that are detected by a scanner. A computer converts these signals into three-dimensional images of the heart that can be moved to obtain any two-dimensional cross-section.

Magnetic resonance imaging involves the removal from the body of all accessories and clothing containing metal, including jewelry, metal fasteners, prostheses, wigs and hearing aids. Metallic objects can interfere with the magnetic field, affecting image quality. Magnetic resonance imaging is painless; it usually lasts from 30 to 60 minutes.

The procedure involves lying on a table that slides into the tube. The motion may blur images, so it is important to lie still. The space inside the tube is rather narrow, and some patients may feel uncomfortable. Patients are often offered headphones or earplugs that help block out loud squeaking and percussion sounds generated by an MRI machine.

MRI examination of the coronary arteries Magnetic resonance angiography (MRA) of the coronary arteries is one of the new applications of MRI. For this test, a contrast agent is injected into the vein on the arm. Contrast medication facilitates visualization of the heart and reveals the coronary arteries. One of the advantages of an MRA is that contrast agents tend to cause fewer allergic reactions than those used during computed tomography.

There are no known risks from magnetic fields, and radio waves generated when the coronary arteries are visualized. However, people who have pacemakers, cardioverter defibrillators, or other metal-containing objects inside the body cannot be examined with MRI. Also, the effect of magnetic fields on the fetus is not well understood, so an MRI scan is not recommended for pregnant women.

Computed tomography in the diagnosis

If there is evidence, computed tomography is also performed, but it may not provide the full amount of information, especially if it is performed without contrasting. However, for patients with implanted electronic devices, tomography is the only choice.

Types of Magnetic Resonance that Exist

In the diagnosis by the image, different techniques allow us to obtain results of great value for the study and analysis of our state of health and development. Each technique, of course, has its specificities and characteristics that make it more suitable for one or another situation.

While the X-rays offer a high-quality image to study the hard tissues inside our body, such as bones or teeth, the Magnetic Resonances provide us a vision difficult to improve soft tissues such as muscles, organs, and joints. But like Radiographs, there are many types of Magnetic Resonances, so let's take a look at these types and in what cases they are usually used.

What is a Magnetic Resonance?

A Magnetic Resonance, which is also called Nuclear Magnetic Resonance (NMR) or Magnetic Resonance Imaging, allows us to obtain images of the interior of our body based on the properties of the magnetic fields of water bodies - always under a medical prescription.

The technological basis is the following: the reaction of the bodies that contain hydrogen nuclei, that is to say, that has a composition formed partly by liquids, is directly proportional to the strength of the applied magnetic field. Thus, by capturing this reaction, images of the interior of our body can be generated. It is a system similar to that of ultrasound, although ultrasound uses sound waves instead of magnetic fields.

The two techniques are completely innocuous and harmless to our body and do not involve irradiation, one of the elements that differentiate CT scan from Magnetic Resonance.

What types of Resonances are there?

Obtaining the images of a Magnetic Resonance takes a while, and its use is usually limited to a specific part, joint or organ, so there are different types of MRI to adapt in the best way to the needs of each case. Keep in mind that you do not need the same power to explore internal areas such as organs and the brain than for the more superficial explorations of muscles or bones.

This fact has made possible the adaptation of the technology, and for example, for a Knee Resonance, one can have the possibility of performing it with a smaller machine that does not require to be introduced in it during a prolonged period.

All these types of improvements are aimed at improving comfort and accuracy to make the test more accessible and more useful for you. So, although later MRI Scan Centres could subdivide much more, insignificant terms these are the types of magnetic resonances that we can find:

Muscle-Skeletal Magnetic Resonance. In general, it includes:

•       Knee MRI.

•       Column MRI: cervical, dorsal and lumbar.

•       Shoulder MRI.

•       MRI of Hip.

•       Cranial MRI.

High Field MRI. Ideal for visualizing internal organs and operating areas.

•       Cerebral MRI.

•       Neck MRI.

•       Thoracic MRI.

•       RMN Abdomen.

•       Pelvic MRI.

Areas operated: operated knee, operated column, operated shoulder, operated wrist, etc.

Open Magnetic Resonance (No Claustrophobic). If you are a claustrophobic person, always ask the center if they have the machine open for your type of MRI.

Articular Magnetic Resonance. Only the study of the upper and lower extremities of the body can be done, neither shoulder nor hip. Exclusive for:

•       Knee MRI.

•       Ankle MRI.

•       Standing MRI.

•       Elbow MRI.

•       Wrist MRI.

•       And Hand-held MRI.

Keep in mind that depending on the machinery and services offered by each specialist center, the division of MRI types may vary or be otherwise oriented.

What are Skeletal Muscle Resonances?

The most common Magnetic Resonances are those whose objective to explore are lesions or less internal affectations such as those that can be suffered in muscles or bones. The power needed to be able to visualize these affectations correctly is not as high as that is necessary for deeper areas. So, these Resonances have low MRI scan price in Delhi and are more straightforward.

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