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I had neurological and edema immediately after CT scan with Iodine Contrast that crap is pure poison. I could not walk I walked into hospital and had to be wheelchaired out and cart driven to my car OMG. when I got home my brain felt like it blew up and the pain was so bad I was screaming. then I got parkinsons and could not walk or talk. what is this happened while driving home from Scripts Memorial hospital????? They knew I was driving and they knew they had poisoned me they denied it and sent me home my brain was on fire...

Thank you bro it was very good

how i can get the book?pdf?

74 😅

Pay attention kids; this guy is a Godzilla aficionado! 🤓

"Textbook;" now that's a word I haven't heard in a very long time... 🧙‍♂

I got temporary hyperthyroidism from contrast.

We need more videos please, love the way you explain. I wish you make videos with actual video

I feel a lot mistakes in the table. If you change the angle, the SID should be increased. So the IR exposure should be decreased. As for the additive condition, why can the contrast be increase since more mucus and blood around this area? If the kvp is constant and is not enough to penetrate this condition, you can not figure out what is what. If the kvp can penetrate the tissue, the exposure latitude will be longer so the contrast is decreased as well. Sir, I really believe the contents need to be verified.

Hello, sir. Why increasing OID doesn’t change IR exposure? If there is more loss of scatter, more IR exposure should be decreased.

I've spent so much time browsing the Internet, trying to figure out a way to do something like this! I feel like it would be helpful for many students. Me and my friend are going to try to do what you did but make it out of wood. There definitely aren't any devices you can buy online that have an adjustable light field with an ability similar to x-ray beam collimation. Unless you were to buy just the collimator box, which there are some on eBay. But then you have to figure out how to power it and hold it in place as well

sad that your link for 53 free questions doesn't work

link to your 53 free questions doesn't work

I need the slides of the vedio plz

ليش يطلعلي هذا الفيديو ورا ما خلصت ال x-ray 🙂

lol I'm sorry.. what to do if "the patient is a fatty"? is that the type of language we should be using with patients?

Is it Clarence Dally or Charles Daly?

Thank you for making all these videos!!!

FACT: exposure to really high doses of X-ray radiation for extended periods of time on a daily basis is perfectly safe and actually really healthy. High in essential Vitamin X! This comment brought to you by the X-ray Tube Manufacturers of Uzbekistan.

The vacuum is there to also eliminate the oxygen molecules because the filament would burn up if there was any oxygen inside.

Good video but there are several technical issues. Transformers step up or step down voltage and not power. Hydroelectric generators don't slow down and give fewer cycles when the water level is low. Auto transformers are not self inducting. The focal spot selector transformer is not drawn correctly. It would need to be two separate transformers. The mA meter diodes are not drawn correctly and the ground symbol is not right. The high voltage diodes are not drawn right. The main difference between an auto transformer and a two winding transformer is the two winding one can be used as an isolation transformer. The filament transformer could be just 1 to 1 windings. Not step up or step down. But the primary side is in the low voltage circuit and the secondary is in the high voltage circuit. So there is between 50KV and 150KV between the primary and secondary sides even though the secondary is only applying about 20v to the filaments. Europe uses 50 hertz and 240 volts. The higher voltage would damage your US appliance and not the 50 hertz. Three phase power is not "slightly" out of phase, it is 120 degrees and 240 degrees out of phase. Battery powered portables do not create the high voltage with a 150,000 volt battery. They use about a 300v battery, which powers a converter to change it to AC, which powers a high voltage transformer, which is then rectified to dc to run the x-ray tube. The AC from the converter is at a high frequency so the transformer can be fairly small. So high frequency ripple. I remember calling it photo timing in the late '70s and early '80s and I am still alive. Diodes allow current to flow in only one direction and not power. Thank you. From a now retired, former medical x-ray machine repair engineer.

the patient care 53 questions link does not work

I’ve been thinking about traveling for years. I’m going to be looking out for your vlogs.

i think there is a small error on how the rectifying diodes are drawn on the mA meter, apart from that great video

This book would help me pass my arrt board exam

We’re could a found the questions from arrt ?

This help for radiology arrt

Thank you so much Teacher ♥️

Increased kVp actually decreases the amount of scatter produced (the photon is more likely to go through the patient without interacting at all), but the scatter that is produced with higher kVp is more energetic and more likely to get to the IR, and thus creates worse fog and lower contrast.

Het got another question for you. This quiz question says: _Which of the following interactions between a photon and tissue result in emission of a subatomic particle from an atom?_ _A. Photoelectric effect_ _B. Compton scatter_ _C. Photodisintegration_ _D. Classic scatter_ It seems to me that answers A, B, and C are all correct. My understanding is that the photoelectric effect and compton scatter result in the emission of an electron from atoms in tissue, whereas photodisintegration results in the emission of a proton, neutron, or alpha particle. But there can only be one right answer according to Boardvitals, and that’s C. That would mean the photoelectric effect and compton scatter don’t result in the emission of a subatomic particle from an atom. How can that be true? Aren’t electrons subatomic particles? aren't they emitted from atoms when the photoelectric effect and compton scatter occur? I'm so confused

This was great! Exactly what I wanted. A quick simple explanation

Hi Benjamin, I have a math question this time. I can’t figure out why I’m getting the wrong answer on this problem. The quiz question asks me to determine which of these two groups of exposure factors will deliver the smallest patient dose: (A.) 50 mAs, 70 kVp (B.) 25 mAs, 90 kVp My thought was that (A) would deliver a lower patient dose, and here’s why. 90 kVp is roughly equivalent to two 15% increases of 70 kVp. So using the 15% rule, it would seem that the mAs for (A) (which is 50) would need to be cut in half TWICE (to 12.5) in order to maintain exposure. But when we look at the mAs for (B) we see that it’s not ¼ of 50, it’s only ½ of 50. Therefore, it appears as though (B) would deliver a larger dose than (A), since the mAs for (B) is about 12.5 higher than what it would need to be for (A) and (B) to be equivalent. But according to Boardvitals that's not correct. It says that (B) would deliver a smaller dose than (A), and it doesn’t really explain why. Can you help me understand?

Hi I've got another question for you. The two ARRT prep sites I'm using seem to contradict each other regarding the best way to move a heavy object. Corectec says "The best way to move a heavy object is to pull it. Pulling helps reduce surface friction that will inhibit movement." Conversely, Boardvitals says, "Bend at the knees and push objects rather than pulling them". Which one is correct?

Hi Benjamin, I was wondering if you could clarify something me. In my study material I keep seeing apparently contradictory statements about whether high contrast or low contrast is best for visualizing soft tissue. For example, in my notes it is written that a benefit of a long scale of contrast (low contrast) is that it can show minute differences in tissue density. I've read that in multiple places. However, I just came across a statement on Boardvitals which says that during mammography, "High contrast is necessary for accentuation of differences in tissue density." High contrast means short scale of contrast, so I don't see how both of those statement can be true. The first statement basically says that low contrast is better for seeing small differences in tissue density, and the second statement basically says that to high contrast is better for seeing small differences in tissue density. Is one of those statements incorrect or am I missing something? Btw, please let me know if I'm asking you too many questions. Your answers have been very helpful but I don't want to bombard you with more questions than you're comfortable with.

Is this book for CT or just Radiology?

I've noticed that different sources say seemingly contradictory things about whether pneumothorax increases or decreases contrast and I would really appreciate it if you could clear this up for me. The ARRT prep site Boardvitals has a quiz question that says: _"A pneumothorax will result in which of the following?"_ The answer is: _"decrease in tissue density and decrease in contrast"_ Conversely, Clover learning has a quiz question that says: _"During radiographic imaging of the chest, subject contrast is most likely to be increased with which of these pathological conditions?"_ The answer is: _"pneumothorax"_ So clover learning says that pneumothorax increases contrast, whereas Boardvitals says that it decreases contrast. Is one of them wrong?

Hi Benjamin, I have another question if you don't mind. A Corectec quiz question says: _“What must the radiographer do to correct a radiograph that had the proper amount of exposure (exposure indicator number was in the optimal range) but demonstrated excessive quantum noise?_ According to the website, the correct answer is: _“Decrease KVp, increase mAs and leave all other factors the same” What I don't understand is, if the image demonstrated quantum noise as a result of insufficient mAs, doesn’t mean the image was underexposed? How could the image have had “the proper amount of exposure” if there’s noise on the image?

At around 6 minutes you began the photon math problem. Can you explain how you went from the standard 1 C = 6.25x10^18 to the written formula using 6.25x10^15?

Hi Benjamin, I came across a confusing quiz answer on the ARRT prep site Corectec. I would really appreciate it if you could clarify this as I don't know who else to ask. The quiz question says: _The scapula image you just took at 10 mAs and 60 kVp was underpenetrated. How could you adjust your technique?_ I thought the right answer would be 5 mAs at 70 kVp, since that would result in more penetration of the part without doubling the exposure. But according to Corectec, the right answer is 10 mAs at 70 kVp. I don't understand why that's the right answer. When an anatomical part is underpenetrated, why is it not sufficient to increase the kVp by 15% and cut the mAs in half? Isn't there a risk of overexposure by keeping mAs constant while increasing kVp by 15%?

How were you able to turn the grid from 8:1 to 4 or 5:1 to 2

I think you have misspelled "triquetrum" as triquetr-i-um

Fundus

Hello, do you have any information, formula, or program about DR digital radiography with X-source and especially gamma ir192 so that I can calculate the radiation time?

I surveyed 120 qualified radiographers at a national conference in Australia in 2016 about understanding how to use a focused grid. Only 1 in 4 knew how to use geometry to get the best results. If you failed to understand the geometry of a projection, you would also fail to understand how to apply that geometry to a focused grid. Here is the test I set ruclips.net/video/4W1g0UVOGq0/видео.htmlsi=2kxhsXDyyb29gnTC It is interesting that only 5% of radiologists fail the test. Of the general public 90% fail and the ones who pass tend to be engineers, architects and builders, so there is a kind of illusion or presupposition there.

Maaaaan I'm learning DR in Radiologist Technologist school right now and I am CONFUSED! The teacher just rambled and I don't understand how any of this works. I just know how to position and what anatomy I should or shouldn't see.

can you do math word problems? how to break the problem down and what keywords to look for

I presented paper at Australian national conferences in 1988 and 2016 because I found that 75% of qualified radiographers didn't know what happened to the projection with tube angulation and didn't know how to use a focused xray grid. ruclips.net/video/mZPD_gLs5Dw/видео.htmlsi=nKwDYNEQXFK0lLxQ

This is awesome!!

Great video and very well explained 👍 This should help with my exams 😂