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What is the difference between a CT and an MRI?

Answer examples and advice for how to answer this interview question for a Radiation Therapists interview

How to Answer

Your focus may be centered on radiation therapy, but having a broader knowledge of the machines that produce imaging like a CT scan or an MRI are also important. Doctors use these tools to help them to identify exactly where radiation needs to be applied. An MRI does not use x-rays or radiation and it is often used to produce imaging of the brain. A CT scan takes multiple images from different angles to allow you to see layers of a section of the body. Be sure to familiarize with any specific medical terminology you might be questioned about.

What is the difference between a CT and an MRI?

View user-submitted Answers

What is the difference between a CT and an MRI?
1.
Basically, a CT scan is used more for bony anatomy and internal organs, while an MRI is used to view soft tissue.
2.
A CT exam uses radiation to obtain images and MRI does not use radiation but electromagnetic waves. CT exams are much quicker than MRI exams. Each have there benefits and downfalls.
3.
A CT uses kV radiation to take images and it displays the image based on the electron densities of the tissues that the xrays have passed through. An MRI uses magnetic fields and not xrays to take the image.
4.
Ct uses ionizing radiation and mri uses magnetic resonance for imaging. Mri is usually good at looking at soft tissues and ct is good at boney anatomy.
5.
Computerised tomography and Magnetic Resonance Imaging.
6.
CT uses radiation for imaging where as MRI uses a magnetic resonance technology.
7.
CT scan uses Xray where as MRI uses magnetic resonance. Depending on what needs to be observed, the CT scan is really good for examining bones structure and density where as the MRI is good for looking at tissue.
8.
A ct scan give good detail about bony anatomy whereas mri gives good detail about soft tissue. mri uses strong magnetic field whereas ct scan uses radiation exposure.Mri is more versatile in examining a large variety of condition.
9.
CT stands for computed tomography and visualised bony anatomy well. MRI stands for magnetic resonance imaging and is better for viewing soft tissue.
10.
A CT scan are images of the skeletal structure and major organs where as an MRI is an image of the soft tissue.
11.
Ct is more better at looking at the bony anatomy of the body and mri is better at looking at soft tissue.
12.
CT takes images of bone and tissue whilst MRI takes images of both bone and soft tissue.
13.
CT is computed tomography and MRI is magnetic renosance imaging.
14.
CT use radiation and allows you to visualize boney matter better than MRI which uses radio-waves and allows you to visualize soft tissue.
15.
A CT machine uses X-rays to visualize internal anatomy of the patients while a MRI uses magnets and radio waves.
16.
CT is a axial slice using radiation to aquire images. MRI is a non-radiation imaging source using a magnet field to aquire images, usually perferred for Brain imaging.
17.
CT uses x-rays. MRI uses Magnetism. MRI provides much better soft tissue definition than CT.
18.
CT uses radiation to acquire slices of anatomy. MRI using magnets to create images of the human anatomy.
19.
A CT uses radiation to create a series of CT images. The CT density can be used and allows geometric accuracy. MRI is good for soft tissue differentiation and uses magnets which interact with the tissues in the body.
20.
CT scan is generally the Boney Anatomy outline, while an MRI is more Soft Tissue Diagnosis scanning. With CT you see the skeleton more than specifics of the organs and internal tissues, while with MRI you get a clearer image of the Soft Tissues.
21.
Mri deals with more a synovial fluids to high light whereas ct.
22.
CT scanning uses radiation to create and image and MRI uses strong magnets that align hydrogen atoms within the body. CT is particularly useful in RT as planning systems are able to calculate electron densitys and dose distrbution through a slice. They also provide a good image of boney anatomy, and the procedure of a CT scan is often quicker. MRI however is superior in the facts that the patient receives no radiation dose, and that soft tissue anatomy is captured better than CT.
23.
A CT scan is quicker and uses ionising radiation, an MRI takes longer and uses non ionising radiation, provides much more detailed soft tissue.
24.
A CT and MRI differ in many ways. A CT uses x-rays to produce a cross-sectional image of internal anatomy, and is best used to visualize bony anatomy. An MRI uses a very large magnetic to produce powerful magnetic fields that act upon the water molecules in our tissues. The molecules spin in different directions and depending on how they are slowed down, they will produce a detailed image of internal anatomy and more specifically soft tissue anatomy.
25.
CT and MRI both take images in slices, like a slice of a loaf of bread, radiation contrast may or may not be used. However, CT uses x-rays and MRI images are the result of a high energy revolving magnet.
26.
Ct scans use xrays where as mri scans use powerful magnetic fields and radio frequency pulses to produce images.
27.
The main difference between a CT scan and an MRI scan is that a CT scan uses radiation however an MRI scan does not emit ionising radiation. A CT scan is better for seeing bones, but MRI is better for viewing soft tissue and ligaments.
28.
A CT scan just provides images of the bones where as MRI shows a more defined image of tissues.
29.
Ct scans use x ray but MRI scans use powerful magnetic fields.
30.
The difference b/w ct and mri is CT is that when your exposed to radiation and it takes slices from patient, whlie in MRI A patient is placed into a magnetic field and from the resonance of the atoms you get image of patient .
31.
CT scans make use of X rays whilst MRI scanners make use of high energy magnetic fields and radio frequency pulses in order to in order to produce much more clearer and detailed images of bones tissues and organs.
32.
A CT uses radiation and has a better image while MRI uses a magnetic field.
33.
MRI provides better soft tissue definition without exposing the patient to radiation (also longer times). CT on the other hand provides good contrast for connective tissue (bone) and air (lungs) and is relatively quick.
34.
A CT scanner emits ionizing radiation where as an MRI does not. A CT is also very useful for viewing bony anatomy as well as detecting lung cancers. An MRI on the other hand is useful for viewing soft tissue and ligaments as well as detecting brain cancers.
35.
MRI uses magnets to generate the image while CT uses high energy gamma rays.
36.
A CT uses xray imaging to view largely the soft tissue parts of the body. Often contrast is used to help image the digestive tract and vascular system. MRI uses high powered magnets to image the body and is especially beneficial for imaging the brain.
37.
CT uses ionising radiation whereas MRI make use of magnetic fields to acquire images. CT scans show good bony anatomy while MRI scans show good soft-tissue definition.
38.
CT gives good boney delineation while MRI provides better soft tissue definition and can show the difference between normal tissue and cancerous tissues.
39.
Simply put, CT scans highlight bone far more clearly than an MRI, which highlights tissue. Each have merits within this profession, however CT would be used most often, for planning purposes.
40.
Ct looks at bony anatomy whereas mri looks at soft tissues.
41.
CT is for good for bony anatomy whereas MRI is good for soft tissue.
42.
MRI uses magnetic fields and radio-waves to produce an internal image of the body whereas CT scans use X-rays from multiple angles to produce cross-sectional images of the body.
43.
Ct scan provide a cross- section of organ, bones, and body parts however MRI provides a more clear picture, it does make a 2d and 3d images of body parts.
44.
CT images are of the bones and MRI images are of the whole body.
45.
CT uses ionizing radiation and MRI uses magnetic resonance for imaging.
46.
A CT scan is better for looking at bones and a MRI scan is better at looking at soft tissue.
47.
A CT is a modality which uses ionising radiation to produce axial images of the body. An MRI uses electromagnetic frequency to produce images in multiples planes.
48.
Ct are able to demonstrate more bony anatomy while MRI is able to demonstrate more soft tissue anatomy.
49.
Ct uses xrays to take an axial, coronal, and sagittal view of a body part. MRI is magnetic resonance imaging and takes an image in one plane at a time.
50.
CT uses radiation to produce images. MRI uses magnetism. MRI produces good soft tissue images while CT produces good bony anatomy images,

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