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What is the difference between a CT and an MRI?
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.

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User-Submitted Answers

What is the difference between a CT and an MRI?
Basically, a CT scan is used more for bony anatomy and internal organs, while an MRI is used to view soft tissue.
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.
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.
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.
Computerised tomography and Magnetic Resonance Imaging.
CT uses radiation for imaging where as MRI uses a magnetic resonance technology.
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.
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.
CT stands for computed tomography and visualised bony anatomy well. MRI stands for magnetic resonance imaging and is better for viewing soft tissue.
A CT scan are images of the skeletal structure and major organs where as an MRI is an image of the soft tissue.
Ct is more better at looking at the bony anatomy of the body and mri is better at looking at soft tissue.
CT takes images of bone and tissue whilst MRI takes images of both bone and soft tissue.
CT is computed tomography and MRI is magnetic renosance imaging.
CT use radiation and allows you to visualize boney matter better than MRI which uses radio-waves and allows you to visualize soft tissue.
A CT machine uses X-rays to visualize internal anatomy of the patients while a MRI uses magnets and radio waves.
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.
CT uses x-rays. MRI uses Magnetism. MRI provides much better soft tissue definition than CT.
CT uses radiation to acquire slices of anatomy. MRI using magnets to create images of the human anatomy.
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.
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.
Mri deals with more a synovial fluids to high light whereas ct.
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.
A CT scan is quicker and uses ionising radiation, an MRI takes longer and uses non ionising radiation, provides much more detailed soft tissue.
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.
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.
Ct scans use xrays where as mri scans use powerful magnetic fields and radio frequency pulses to produce images.
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.
A CT scan just provides images of the bones where as MRI shows a more defined image of tissues.
Ct scans use x ray but MRI scans use powerful magnetic fields.
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 .
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.
A CT uses radiation and has a better image while MRI uses a magnetic field.
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.
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.
MRI uses magnets to generate the image while CT uses high energy gamma rays.
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.
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.
CT gives good boney delineation while MRI provides better soft tissue definition and can show the difference between normal tissue and cancerous tissues.
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.
Ct looks at bony anatomy whereas mri looks at soft tissues.
CT is for good for bony anatomy whereas MRI is good for soft tissue.
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.
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.
CT images are of the bones and MRI images are of the whole body.
CT uses ionizing radiation and MRI uses magnetic resonance for imaging.
A CT scan is better for looking at bones and a MRI scan is better at looking at soft tissue.
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.
Ct are able to demonstrate more bony anatomy while MRI is able to demonstrate more soft tissue anatomy.
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.
CT uses radiation to produce images. MRI uses magnetism. MRI produces good soft tissue images while CT produces good bony anatomy images,
CT uses x- rays and MRI uses powerful magnetic fields and radio frequency pulses to produce detailed pictures of organs, bone and other internal body structures.MRI in normal and abnormal tissues is often clearer on MRI image than a CT
A CT scanner uses radiation to produce a 3D scan, a MRI uses magnetism.
MRI uses magnetics and does not use non ionizing radiation. There is better soft tissue contrast on MRI, however CT is what we mainly use for planning purposes although we can perform image fusion.
A CT is a multi-plane imager that uses radiation to obtain images within the body. An MRI is also a multi-plane imager; however, it uses magnets to obtain the images rather than radiation.
A ct uses radiation to show better contrast. While MRI uses the rotation of magnets to create N image.
Uses hight levels of ionization to dissipate or shrink cancer cells.
A CT uses ionizing radiation and a MRI uses radio waves to take images. CTs are better for diagnosing and locating tumors and MRIs are better for soft tissue injuries. CT makes it easier to create plans because the images are taken in slices and can be 3mm in size.
CT uses radiation to produce an image. CT is used to view bone and muscle while MRI uses a magnet to provide an image and better used to visualize muscles and joints.
A CT Scan is best suited for viewing bone injuries, diagnosing lung and chest problems, and detecting cancers. An MRI is suited for examining soft tissue in ligament and tendon injuries, spinal cord injuries, brain tumors,
A MRI scan has a much longer duration than that of a CT scan, a CT scan uses x rays and MRIs use powerful magnetic fields and radiowaves. MRI gives a much more clearer image as it creates a detailed image of organs, soft tissues and other internal structures.
A CT scan mainly looks at the brain and MRI at the rest of the body.
CT scans use x rays. MRI scans use magnetic fields which can provide a greater distinguish between normal and abnormal tissue images better than CT scans.
CT scan is used to identified the internal part of human body like bones, where MRI demonstrate the tissues. MRI is more accurate that CT.
A CT scan uses radiation while an MRI uses magnets.
CT- hounsfield units, bony definition MRI- soft tissue definition.
Ct captures bony anatomy whiles MRI makes it possible to distinguish between the tissues.
MRI doesn't use ionizing radiation.
A computerised tomography and magnetic resonance imaging are different as the CT scan uses x-ray whereas an MRI uses alpha, beta and gamma rays to produce an image.
Ct uses radiation to produce an image and is better at showing bony anatomy whereas MRI uses a magnetic field and hydrogen atoms in the patient and is better at showing soft tissue deliniation,
A CT scan uses X-rays to create a high quality image which is 360 degrees of organs and bones which are needed to be focused on. An MRI scan used magnets to product a 3D image of bones and joints which are of focus.
CT scanning uses X-rays to get a high quality 360 degree image of an organ or bones. But a MRI scanner uses magnets to create an image which shows joints and bones of the patient.
A CT scan uses X-ray to create a 3D image of organs or bones but a MRI scanner uses magnets to create an image of bones or joints.
The main difference is how the machine takes imagines. The CT machine uses tons of xrays to get CT slices to create an image. The CT will also show bones. An MRI uses magnets and radio waves to create an imagine. Bone will not show up.
CT uses radiation while MRI uses magnetic waves.
CT highlights bony features better but liable to artifacts created by implants for example. MRI is better at viewing soft tissues.
A CT scan is for you head and an MRI scan is for your full body.
Mri is the whole body ct is the brain.
A major difference between the two is that MRI uses magnetic waves instead of radiation, so a patient with any metal in their body or a pacemaker cannot have one. An image from an MRI is clearer and preferred for soft structures and tissues, whereas a CT image is not as clear as an MRI, but is preferred for solid structures such as bones and serves as a great reference for positioning a patient for treatment.
A CT uses X-rays while an MRI uses magnetic waves. They both are used for imaging.
CT is a scan which uses X-rays to look at the joins and bones in the person body but an MRI scan is a scan which uses magnets to.
Computed tomography is good for visualising bony anatomical structures and has low tissue density, Magnetic resonance imaging is not good for the visualisation of bony anatomy but excellent for soft tissue visualisation. High tissue density.
An MRI uses a magnetic field to move hydrogen ions in your body while a CT scan uses xray beams to take images of slices of the body.
An MRI uses a magnetic field to rearrange the hydrogen ions in the body while a CT scan uses an x-ray beam to take images of the body in slices.
CT emits radiation, MRI does not.
Ct uses xrays to image a patient where as MRI uses magnetic fields to produce a better quality image.
CT scans uses x-ray technology to produce diagnostic images. CT's are used to diagnosing fractures, serious head injuries, and localizing and the size of tumors. While MRI uses radio waves and a magnetic field to produce images for tendons, ligaments, and soft tissue.
CT are usually prescribed to deal with ore bony structures. MRI is usually prescribe for soft tissue.
CT uses low dose radiation where as MRI is a magnetic beam..MRI has better soft tissue definition.
A CT scan uses ionizing radiation whereas an MRI does not.
MRI shows more soft tissue and squires images using magnets. Where as CTs use radiation to create images.
CT is better for bone definition and MRI helps to view soft tissue in the body.
Higher exposure to radiation with CT. Mri gives a clearer image whenit comes to abnormal and normal tissue.
MRI is non-ionizing and gives a great view of soft tissue. MRI scans take a long time to acquire. CT using ionizing radiation, is great for imaging bone and can be acquired very quickly.
X rays protons + magnets.
One uses radiation the other uses magnets. different imaging.
CT scans use x-rays. MRI use magnetic fields and radio frequency pulses that produce more clear images of softer tissue, bone and internal organs.
A CT uses x-rays, while an MRI uses magnetic fields and radio frequency pulses to get clearer images of soft tissues, bones and internal organs.
A CT Scan (or CAT Scan) is best suited for viewing bone injuries, diagnosing lung and chest problems, and detecting cancers. An MRI is suited for examining soft tissue in ligament and tendon injuries, spinal cord injuries, brain tumors, etc. CT scans are widely used in emergency rooms because the scan takes fewer than 5 minutes. An MRI, on the other hand, can take up to 30 minutes.
Computed tomography and magnetic resonance imaging. MRI shows better soft tissue definition and CT shows good bone contrast, and is used for the planning of radiotherapy treatments.
CT uses x-rays to acquire images. MRI uses a strong magnet and pulsed signalling to manipulate the nucleus hydrogen atoms, quantify their resting times and produce images processed via a computer. CT is quicker and quiet. MRI is longer with good soft tissue definition. CT has good bony anatomy information.
MRI uses magnets to create the images and does not give the patient a dose of radiation. CT uses radiation and does give the patient a dose of radiation. MRI is better for soft tissues while CT is better for bones.
A ct scan shows images of internal organs, while an mri shows images of tissues.
CT uses x-rays and is good for detecting bones. MRI uses magnetic resonance and is good for detecting tissue.
Unlike CT scans, which use X-rays, MRI scans use powerful magnetic fields and radio frequency pulses to produce detailed pictures of organs, soft tissues, bone and other internal body structures.
CT uses radiation while MRI using magnetics to create images.
Ct is ionizing radiation.
CT scanning is more rapid than an MRI, and provides better detail of the bones of your spine. An MRI is non-invasive, does not use radiation, and provides good visualization of the spinal ligaments, a herniated disc, bony infection of the spine or disc, a tumor, and spinal cord compression or damage.
CT's use only X Rays whereas MRI's use magnetic fields to produce a more useful, thorough image.
Ct gives the hu numbers and mri gives the tissue weighted images.
CT is bony anatomy MRI is soft tissue.
MRI is used for soft tissues and CT is for bones.
CT uses energy similar to radiation therapy but much lower in energy to image a patient. It sends x-rays through the body as it moves across to image the length of the anatomy. It is great for providing contrast in bony anatomy and visualizing the lungs. MRI uses strong electromagnetic fields and pulses of radiofrequency to to produce images of organs and other soft tissues. No radiation is involved in MRI.
Ct uses radiation to scan axial slices through the body. Mri uses a magnet to excite atoms in the body to create images.
Ct is xray mri is magnets.
CT uses ionizing radiation and MRI uses sound waves.
MRI is magnetic resonance imaging, this uses magnetic fields and radio frequencies to produce images with excellent soft tissue detail, it is particularly useful when diagnosing brain tumours. CT or Computersied Tomography uses x-rays to produce images, it is vital for radiotherapy as it is only through the use of hounsfield units that radiotherapy plans are able to be produced and dose modelled.
CT is ionizing radiation where as MRI is the use of strong magnet to obtain an image.
CT picks up bone whereas MRI is capable of highlighting soft tissue as well due to higher resolution.
A CT uses an x-ray where an MRI is a magnet resonance imaging system where it uses magnets to look at soft tissues, bones, and other structural organs.