Difference between CT scan and MRI

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By Dr. Abbas January 24, 2023
Difference between CT scan and MRI
erofwatauga.com/difference-between-ct-scan-and-mri
Due to the unpredictability of life, everyone must occasionally deal with unpleasant
circumstances. Each person experiences some ups and downs in their health. Doctors
advise specialized tests for a particular set of injuries and conditions. One of the most
frequent lab tests they advise is a CT scan and MRI.
A CT or computed tomography scan creates comprehensive images of the body using X-
rays. In contrast, an MRI, or magnetic resonance imaging, creates detailed images of the
body using a magnetic field and radio waves. While Magnetic resonance imaging are
better at imaging soft tissue and can provide more detailed images of various types of
tissue, CT scans are typically quicker and better suited for looking at bones. Go for a
reputable lab for CT scan services for accurate and quick results.
Procedure Followed for a CT scan and MRI
In contrast to MRI, which is superior for imaging soft tissue, including the brain, spinal
cord, and muscles, CT scans are quicker and can produce more detailed images of
bones. Magnetic resonance imaging uses no ionizing radiation and is thought to be safer
than CT scans, which use ionizing radiation that may harm cells and raise the risk of
cancer. Even though they appear to be nearly identical, there are some distinctions
between them.

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CT scan Procedure
The technician requests the patient to remain calm down. Moreover, he also
instructs them to hold their breath for a brief period during the scan.
The patient will then lie on a table that slides into the CT scanner.
As the scanner rotates around the patient, several X-ray images are taken from
various angles.
The photos will be transferred to a computer, where they will be merged to provide
incredibly precise cross-sectional views of the body’s interior.
MRI Procedure
A table that slides inside the Magnetic resonance imaging machine will be used for
the patient’s position.
MRI is a slightly noisy procedure, so the doctor or technician provides earplugs or
headphones to the patient. It helps them to remain calm and avoid noise from the
equipment.
The device will produce precise photographs of the body’s interior using a magnetic
field and radio waves.
The lab technician will also request the patient to remain motionless for a few
minutes as the machine takes numerous pictures.
A radiologist will examine the images after they are transmitted to a computer for
analysis.

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Special Note: It is significant to note that some people might have a contraindication or
are allergic to contrast agent that is sometimes used in CT scans or MRIs or has metal
implant that would prevent them from having one of the procedures. When you go
for Emergency CT scan services or MRI, please tell the doctor about your allergies
before the test starts.

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Applications of CT scans and MRI
MRI and CT scans are utilized for various therapeutic and diagnostic applications. The
most common applications of CT scans include:
Recognizing and treating wounds, such as fractures or internal bleeding.
Determining and tracking the development of illnesses, including cancer and heart
problems.
Supervising medical operations like surgery and biopsies.
Recognizing and keeping track of the impacts of long-term illnesses like
emphysema.
Some of the most common uses of MRI include:
Brain and spinal cord imaging, which can be used to identify degenerative
disorders, strokes, and brain tumors
Joint imaging to assess injury or degeneration, including imaging of the knee,
shoulder, and hip
Images of muscles and tendons are used to assess chronic diseases or injuries.
Imaging of internal organs such as the prostate, kidney, and liver.
Blood vessel imaging to detect blockages or aneurysms.
Special Note: It is significant to note that some people might have a contraindication or
are allergic to contrast agent that is sometimes used in CT scans or MRIs or has metal
implant that would prevent them from having one of the procedures. When you go
for Emergency CT scan services or MRI, please tell the doctor about your allergies
before the test starts.

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Final Words
Both CT scans and MRIs are used for various reasons, as suggested by doctors. Your
doctor will suggest the test according to your condition. ER of Watauga has a 24/7 open
and functional laboratory that efficiently perform CT scan and MRIs. You can visit our
emergency room for the best services and accurate lab tests.
Frequently Asked Questions about CT Scans and MRI:
What does a CT scan show that an MRI does not?
CT scans and MRI tests are conducted for imaging the internal body organs. When it
comes to organs, tissues, and skeletal structures, Computed tomography (CT) is the first
pick. On the contrary, MRI provides more detailed images.
Which is better, MRI or CT scan?
Magnetic resonance imaging is better than CT scans when it comes to more transparent
images. Besides this, when doctors want to look deeper into the soft tissue, they ask for
an Magnetic resonance imaging instead of a CT scan. Hence, for clearer and closer
images, MRI is better than a CT scan.
How long do CT scans take?

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CT scans usually last up to 15 minutes, and this test takes less time than MRI, which may
take hours depending upon the various factors. But remember that you will wait to get the
CT scan test results as a radiologist needs to see the results once the computer scans
the information
What is the most common reason for a CT scan?
Although CT scans are recommended for many reasons, one of the most common ones
is chronic back pain and spinal injury. So, when your doctor has to evaluate the spinal
fractures, he may ask you for a CT scan. Besides this, it is also recommended for tumors
and migraines by your doctor as per the condition of the patient.
What should you not do before a CT scan?
There are a few pieces of advises that you must follow if you are going for a CT scan.
Avoid wearing jewelry, including earrings, rings, watches, necklaces, etc.
Do not wear clothes that have a metal zipper.
Also, remove glasses, hairpins, hearing aids, and any dentures that can interfere
with the CT scan testing.
What is a CT scan?
A CT (computed tomography) scan is a medical imaging technique that uses X-rays and
computer processing to create detailed cross-sectional images of the body.
What is an MRI?
MRI (magnetic resonance imaging) is a non-invasive imaging technique that uses a
powerful magnetic field and radio waves to generate detailed images of the body’s
structures.
Are CT scans and MRIs the same?
No, CT scans and MRIs are different imaging techniques. CT scans use X-rays, while
Magnetic resonance imaging use magnetic fields and radio waves to produce images.
They provide different types of information and are used for different purposes.
Are CT scans and MRIs safe?
Both CT scans and MRIs are generally safe diagnostic tools. However, they involve
different levels of radiation exposure. CT scans use X-rays, which expose the body to
ionizing radiation, while Magnetic resonance imaging do not use radiation. Your
healthcare provider will determine the most appropriate imaging option for your specific
needs.
Are CT scans or MRIs painful?

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Neither CT scans nor Magnetic resonance imaging are typically painful. However, you
may experience some discomfort depending on the specific procedure. The imaging
technologist will guide you throughout the process and ensure your comfort.
How long does a CT scan or MRI take?
The duration of a CT scan or MRI can vary depending on the specific body part being
examined and the complexity of the scan. Generally, a CT scan takes a few minutes to
complete, while an Magnetic resonance imaging can take anywhere from 30 minutes to
over an hour.
Will I need any special preparations for a CT scan or MRI?
Your healthcare provider will provide you with specific instructions based on the type of
scan you require. In some cases, you may need to avoid eating or drinking before the
procedure or remove certain metallic objects.
Can I have a CT scan or MRI if I have a metal implant or device?
It depends on the type of implant or device. Some metallic objects may interfere with the
Magnetic resonance imaging, while others are safe. It’s crucial to inform your healthcare
provider about any implants or devices you have before scheduling the scan.
Are CT scans or MRIs used for specific conditions?
CT scans are often used for assessing bone fractures, lung conditions, and identifying
internal injuries. Magnetic resonance imaging are frequently used for evaluating soft
tissues, such as the brain, spinal cord, joints, and organs.
How do I prepare for a CT scan or MRI?
Follow the specific instructions given by your healthcare provider. These may include
fasting for a certain period, avoiding certain medications, wearing loose-fitting clothing,
and removing jewelry or metallic objects.