Contrast Agents in X-ray and CT Scans: What You Need to Know
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- čas přidán 17. 04. 2023
- Contrast agents in X-ray and CT scans will be covered in this video. Contrast agents are substances that are used to enhance the visibility of certain tissues or structures in medical imaging. We discuss four types of contrast agents: air, carbon dioxide, barium, and iodine.
Air and carbon dioxide are used as contrast agents in some medical imaging procedures, such as double-contrast gastrointestinal studies. Barium, on the other hand, is commonly used in X-ray imaging of the digestive system.
Iodine-based contrast agents are the most commonly used contrast agents in CT scans. They can be either ionic or non-ionic, depending on their electrical charge. Non-ionic contrast agents are generally considered to be safer than ionic contrast agents, as they are less likely to cause adverse reactions.
Another important factor to consider when using contrast agents is their osmolality, or their concentration of particles in solution. High-osmolality contrast agents can cause adverse reactions, such as nausea and vomiting, in some patients. Low-osmolality contrast agents are less likely to cause adverse reactions, but they may not be as effective in enhancing image quality.
Overall, contrast agents play a crucial role in medical imaging, helping to diagnose and treat a wide range of conditions. However, their use should be carefully considered, taking into account the specific needs and risks of each patient.
The acute kidney injury link to iodine contrast is covered as well as the belief by some that there is a link between iodine contrast agents and shellfish allergies. - Věda a technologie
You are great thanks for puttng time and effort to help us understand radiology! Cheers from a radiologist student from sweden!
My pleasure! Thanks for leaving the comment and letting me know where you are finding value.
Hello, how to compare accuracy between CTA and MRA? I have a thoracic aneurysm and I had a big number of CT scans thrown my way. I have to have another CTA soon and that makes me really sick of the thought of getting that much of radiation.
You're so smart you're blowing my mind. I can wrap my brain around everything you're saying... BUT!
what's your opinion ?:
On Intravenous contrast dye with CT...
How long should a patient wait to try
to conceive after receiving that specific treatment?
Do you know what the standard recommendation is for that?
www.ncbi.nlm.nih.gov/pmc/articles/PMC9779218/ , here is a paper on contrast risks during pregnancy. I don’t give medical advice but I don’t know of known effects of iodine contrast on conception
Is it safe for autoimmune patients to have iodine and gadolinium contrast agents?
Sorry not my specialty
Can you explain relationships between post collimation, pre collimation and beam collimation?
Do you have a text or something you are referring to and which type of X-ray or CT?
Hii i recently discovered ur channel ...u r doing an amazing job..
I have a question i recently did my dental xray and my daughter was with me just outside the room but the door wasnttclosed she was about 5 feet away ..
So i would like to know how far should a perosn stand when taking a xray are there any risk
In general the further the better for reducing x-ray exposure. The exposure of a single dental x-ray is very low and the amount scattered is also a small fraction of that. If you’re daughter is old enough you can ask her to go down the hall next time, but don’t loose sleep over this exposure.
@@HowRadiologyWorks thanks sir ..
Also may i know how far does the single dental xray radiation reach like do they travle straight line or go anywhere ?
And how far do they reach ?
And is it safe to get dental xray for kids she is 3 and half and dentist asked he to take xray
@@safakhan8599 X-ray radiation cannot be filtrered out completely but it can be reduced to a very low intensity, by having high density material like lead which is usually built into walls. Xray radiation travel in straightlines in vacuum but in air, they get scattered which means they continuously change direction based on probability. To accurately answer your question a medical physicist would have to make a simuation which have to resemble your situation. X-rays can travel to infinity but as i said it's intensity decreases but never goes to 0 (normally 99.99% can be filtered out if you do it correctly with thick lead blocks).
@@safakhan8599 Allowing a 3-year-old child to undergo a dental X-ray is generally considered safe when necessary for diagnosing dental issues. The exposure to radiation during a dental X-ray is minimal, and dentists take precautions to minimize radiation exposure to children. However, it's essential to follow recommended guidelines for pediatric X-rays, such as using lead aprons and thyroid collars to shield other parts of the body. Always consult with a qualified dentist or healthcare professional for specific recommendations based on the child's dental health needs.
What about the high iodine load from contrast CT scans causing hyperthyroidism? That happened to me and I felt terrible for months.
pubmed.ncbi.nlm.nih.gov/22053166/ , thanks for adding this comment. I had hyperthyroidism before as well and it was no fun. I will add this when I update in the future.
Hi guys on the 25th February of this year i have a ct scan with iodinated contrast dye, and i noticed that 2 weeks after that i was having irregular heartbeat, and muscle cramps and twitching, and inching too, i want back to the hospital many times but theh keep letting me its not from the iodine contrast, but 100% knew all this symptoms am having is from the contrast. Please i help to save my Kidneys. I really this it's had effects on my Kidneys.. please i need help to save my Kidneys. It been 2 months now.
Is there barium in iodine contrast?
No barium in the iodine contrast for vessels
Can contrast media cause penile tissue damage in cavernosography test ?
Sorry I don’t have knowledge about this diagnostic test
What if my urinary bladder is not full while having CT scan of my urinary bladder?
Sorry I can’t answer this, please ask your radiologist reading the study about the impact
Can cognitive skills diminish cuz of contrast agent?
I have not seen anything in the literature to suggest that
So you are saying nowdays noniodinate contrast media has a higher viscosity than iodinate contrast
The viscosity discussion was all within the iodine media
Why does it cause rapid heart rate
pubmed.ncbi.nlm.nih.gov/31016447/#:~:text=%E2%80%A2%20Iodine%20concentration%20does%20not%20influence%20the,the%20contrast%20medium%20affects%20the%20injection%20pressure. I’m not sure of the root cause but an interesting thing is that the change in heart rate does not change with concentration.
I thought I pissed myself
Thanks for mentioning that sorry if I forgot to mention that warm feeling like urinating