Showing posts with label 3d x ray scanning. Show all posts
Showing posts with label 3d x ray scanning. Show all posts

Wednesday, June 4, 2014

Can Too many x-rays over abdomen cause problems later?




Amber


I swallowed a quarter when I was 7 and ended up passing it naturally a month later and ended up having over 15 xrays done in one week! Now im almost 20 and have battled (so-called) IBS for over 6 years. Its severe and has become handicapping. I cant work and cancel plans constantly. Ive also suffered 2 misscarriages and 1 complicated full term pregnancy. I was wondering if all the radiation had somehow caused problems in my intestines and problems with my female anatomy also. BTW: Ive had a colonoscopy, barrium swallow and many other tests to rule out anything else it could be.


Answer
No I wouldn't have thought so. When it comes to x-ray exposure it's CT scans (which are in effect 3D x-rays) which you should avoid having too many of -- they give you a dose of radiation equivalent to upwards of 100 chest x-rays.

what dose bone scan invalve?




Jdr





Answer
It depends on which type you are going for? Bone Density Scan is used to see how dense your bones are, head off Osteoporosis. It is easy as lying down on a bed, while the machine takes 3D x-ray of your hip. The isotope bone scan, looking for cancer, infection, calcium uptake. You arrive, they give you a radioactive material, small amount via injection. They send you away for two hours, you can eat, drink be merry. When you return they sit, stand, in front of a Gamma Camera looks like a big drum and they take pictures. That is it all over and go home. Goo Luck.




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Sunday, October 6, 2013

Does the CT Scan need a darkroom and cassette to produce radiographs?

3d x ray scanning
 on rays of the hand. On the left is the first x-ray, taken in 1895. On ...
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"TORPEdo"


Some of us know that the X-ray machine needs a darkroom for the processing of the radiographs. I'm just wondering if the CT scan still needs a darkroom to produce diagnostic images and a cassette that will contain the film.


Answer
Nope!

The CT scanner contains an x-ray tube, the same as a regular x-ray room, but has detectors on the other side, rather than a film cassette. The tube and detectors spin around you (this part is called the gantry) acquiring information continuously (in a spiral) as you move through it on the table.

All the information from the detectors is gathered by the Image Capture System (called raw data) which is then reconstructed, first into a usable image, and then into any way the operator chooses - in different planes, in different slice thicknesses, in different brightness/contrasts ('windows') concentrating on different body parts (ie, bone or soft tissue or lung), or in cool 3D pictures.

These images are then sent electronically to a workstation for the radiologist to report from, and sometimes to the Internet, over a secure connection, for the referring doctor to view.

(PS Even most general x-ray rooms these days don't use film - they use an electronic plate that captures the charge of the x-ray, which is then put through a reader to load onto the computer. The plate is then (electronically) wiped clean and then reused. Some places even have direct-capture systems where the plate is eliminated all together!)

can you make an x ray see through your skull?




Chris


i need an image of the surface of my brain. an mri and a ct scan miss whats under the surface of your brain. the skull and brain are to close together and you cant see it. i think theres something maybe metal under my skull. can an x ray make your skull transparent? i need something like a normal x ray but see through. do you know how?


Answer
X ray have a penetrative power, with the quantity of the rays stopped being a function of the density of whatever it is going through, but it cannot change the property of matter.

Tomography allows a better view that allows a reconstruction of a 3D image by doing several X ray along different directions. Magnetic resonance imaging relies on the different way hydrogen in molecules will align with a powerful magnet, which allows it to image tissue that contain water.

The only imaging technique you have not listed is the positron emission tomography (PET) which require short lived radio active isotopes to be injected.

If those techniques do not work, then your request would need something that is not yet available.




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Tuesday, October 1, 2013

What is the difference between a traditional CT Scanner and a Spiral CT Scanner?

3d x ray scanning
 on Cavendish Imaging offers digital OPG radiography of the whole dental ...
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marshyanke


I know that a spiral produces thinner slices and perhaps in more detail, I am not really sure? I would like to better understand the science behind it? Also, could you respond with some understanding of MRI and Doppler scans as well? Could you provide some of the history of the above mentioned diagnostic tests? Thank you.


Answer
Computed tomography (CT), originally known as computed axial tomography (CAT or CT scan) and body section roentgenography, is a medical imaging method employing tomography where digital geometry processing is used to generate a three-dimensional image of the internals of an object from a large series of two-dimensional X-ray images taken around a single axis of rotation. The word "tomography" is derived from the Greek tomos (slice) and graphia (to write). CT produces a volume of data which can be manipulated, through a process known as windowing, in order to demonstrate various structures based on their ability to block the X-ray beam. Although historically (see below) the images generated were in the axial or transverse plane (orthogonal to the long axis of the body), modern scanners allow this volume of data to be reformatted in various planes or even as volumetric (3D) representations of structures.

Spiral CT scanning is just a new and advanced from of CT scanning: This is a newer type of CT scan, also known as a 'helical' CT scan. It is faster than a standard CT scan and gives an even more detailed picture of your organs and tissues, including blood vessels. This can make it useful for picking up very small tumours. It's called a spiral scan because the X-ray beam rotates around you during the scan in a spiral shape. This gives the radiographers a continuous picture, with no possible gaps between the 'slices' of the scan.

What is an "MRI, CAT Scan, and X-Ray: and are any of these three that I mentioned damaging?




Liberachi


Hello. What is the difference between these three that I mentioned above and are any of these damaging to the body, if so how? Which one of these is less damaging and more damaging and why? Please explain. Thanks.


Answer
MRI stands for magnetic resonance imaging. An MRI scan uses a strong magnetic field and radio waves to create pictures on a computer of tissues, organs and other structures inside your body. An MRI scan can create clear pictures of most parts of the body. So it is useful for all sorts of reasons where other tests (such as X-rays) do not give enough information required. It is commonly used to get detailed pictures of the brain and spinal cord, to detect abnormalities and tumours. Even torn ligaments around joints can be detected by an MRI scan. So, it is being used more and more following sports injuries. It is safe and painless.

CAT stands for Computerized Axial Tomography. The pictures are obtained by differences in X-ray absorption -compared with conventional xrays these differences are very small allowing different shades of grey and distinction between different tissues e.g. between fat and soft tissues and between brain and cerebrospinal fluid. The difference is that there is better details, it is quicker than MRI scan and most systems can be scanned from the brain to the leg. CAT scans are the most damaging, as there is a high radiation risk.

An x-ray (radiograph) involves exposing a part of the body to a small dose of ionizing radiation to produce pictures of the inside of the body. X-rays are the oldest and most frequently used form of medical imaging. Bone xrays are the fastest and easiest way to assess broken bones, no radiations remains in a patients body after examination and they usually have no side effects. Compared to other scans they provide no info on musles, tendons and joints. They are harmless and painless.

An MRI may be more useful in identifying ligament tears and joint effusions in knee or shoulder injuries and in imaging the spine, because both the bones and the spinal cord can be evaluated. MRI can also detect a bone bruise when no crack is visible on x-ray images.

CT is being used widely to assess trauma patients in emergency departments. A CT scan can image fractures of ribs, bones as well as of the spine and 3D images can be made when appropriate to help diagnosis and treatment of the individual patient's condition.

Hope this helps! :)




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Monday, July 29, 2013

can you make an x ray see through your skull?

3d x ray scanning
 on The Army And Navy Of America: Containing A View Of The Heroic ...
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Chris


i need an image of the surface of my brain. an mri and a ct scan miss whats under the surface of your brain. the skull and brain are to close together and you cant see it. i think theres something maybe metal under my skull. can an x ray make your skull transparent? i need something like a normal x ray but see through. do you know how?


Answer
X ray have a penetrative power, with the quantity of the rays stopped being a function of the density of whatever it is going through, but it cannot change the property of matter.

Tomography allows a better view that allows a reconstruction of a 3D image by doing several X ray along different directions. Magnetic resonance imaging relies on the different way hydrogen in molecules will align with a powerful magnet, which allows it to image tissue that contain water.

The only imaging technique you have not listed is the positron emission tomography (PET) which require short lived radio active isotopes to be injected.

If those techniques do not work, then your request would need something that is not yet available.

What is the difference between a CT scan, an MRI, and a X-Ray?




largeaquat


(I don't know if it's a CT or a CAT scan) What is the difference between the three


Answer
CT and CAT are interchangeable. :) The differences between the 3 can get very involved, but can also be simple..

CT/CAT- These machines run off specialized xray technology that takes multiple, cross-sectioned images that are transferred to a computer and seen in a 3D model. The CT stands for computed tomography.

MRI - These machines run off powerful magnets, versus radiation - like X-rays and CT's. Magnetic Resonance Imaging is pretty neat because you actually get magnetized and the atoms in that area line up causing the nuclei in the area to become detectable by the machine. MRI's are often used for more detailed images, and are especially useful for examining different soft tissue organs like the brain, heart, etc. With certain dye injected contrast materials, radiologists are able to see veins or arteries as well.

Xray- These are commonly used for diagnostic purposes because they help show internal structure and can often help a doctor see abnormalities. Normally, a CT or MRI would be ordered if the radiologist needed to see more than what is showing on the Xray.

Xrays can be taken from portable machines, CT/MRI is traditionally done in a big machine where you lay down and the area of interest is scanned.

I found this article that you may find more informative, good luck!

http://hubpages.com/hub/Diagnostic-imaging




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Thursday, July 18, 2013

Does the CT Scan need a darkroom and cassette to produce radiographs?

3d x ray scanning
 on Englands Parnassus: Robert Allott: 9781173044091: Amazon.com: Books
3d x ray scanning image



"TORPEdo"


Some of us know that the X-ray machine needs a darkroom for the processing of the radiographs. I'm just wondering if the CT scan still needs a darkroom to produce diagnostic images and a cassette that will contain the film.


Answer
Nope!

The CT scanner contains an x-ray tube, the same as a regular x-ray room, but has detectors on the other side, rather than a film cassette. The tube and detectors spin around you (this part is called the gantry) acquiring information continuously (in a spiral) as you move through it on the table.

All the information from the detectors is gathered by the Image Capture System (called raw data) which is then reconstructed, first into a usable image, and then into any way the operator chooses - in different planes, in different slice thicknesses, in different brightness/contrasts ('windows') concentrating on different body parts (ie, bone or soft tissue or lung), or in cool 3D pictures.

These images are then sent electronically to a workstation for the radiologist to report from, and sometimes to the Internet, over a secure connection, for the referring doctor to view.

(PS Even most general x-ray rooms these days don't use film - they use an electronic plate that captures the charge of the x-ray, which is then put through a reader to load onto the computer. The plate is then (electronically) wiped clean and then reused. Some places even have direct-capture systems where the plate is eliminated all together!)

can you make an x ray see through your skull?




Chris


i need an image of the surface of my brain. an mri and a ct scan miss whats under the surface of your brain. the skull and brain are to close together and you cant see it. i think theres something maybe metal under my skull. can an x ray make your skull transparent? i need something like a normal x ray but see through. do you know how?


Answer
X ray have a penetrative power, with the quantity of the rays stopped being a function of the density of whatever it is going through, but it cannot change the property of matter.

Tomography allows a better view that allows a reconstruction of a 3D image by doing several X ray along different directions. Magnetic resonance imaging relies on the different way hydrogen in molecules will align with a powerful magnet, which allows it to image tissue that contain water.

The only imaging technique you have not listed is the positron emission tomography (PET) which require short lived radio active isotopes to be injected.

If those techniques do not work, then your request would need something that is not yet available.




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