Quick correction! I would like to clarify the table at the end of the video at 22:00. Increasing kVp increases the relative number of photons (quantity) and therefore increases the intensity of the x-ray beam... therefore, the resultant image has increased density. Increasing kVp also increases the mean energy of the beam (quality) which means the beam has more penetrating power... therefore, the resultant image has decreased contrast. Increasing filtration decreases the relative number of photons (quantity) and therefore decreases the intensity of the x-ray beam... therefore, the resultant image has decreased density. All of this is correct as shown in the table! However, this last point I want to make a correction. There are some nuances related to noise and scatter that convolute the issue, so instead I would encourage you to remember this: increasing filtration also INCREASES the mean energy of the beam (quality) by preferentially filtering out the lower energy photons which means the beam has more penetrating power... therefore, the resultant image has DECREASED contrast, not increased contrast.
Hi Ryan . I am a oversea student , when I came Us , English is the second language it’s mean I have study double . I was keeping watching your video every day , everytime I can ( I still work full time and study) . I passed today ! Thank you so much for sharing because Covid times , no school , no one teaching me . Thanks Ryan 🙂!
Listened to this in the car on my way to take my test and I fully credit this to my passing grade. Perfect refresher and the way you related the answers is very helpful. I appreciate you!
In much shorter time I'm getting more and more educated AND interested about dentistry topics from Dr. Ryan than from college professors combined, thank you is just not enough🙏🙏💙
I wish my professors in 1980 were so clear. I am retaking boards again,moved states again, need to retake boards. I didn’t get this before. I only beginning. Thank you.
Hey Ryan, As always great videos with excellent information given in nut shell. In the last slide, the table is stating "Energy" and in the same column it is mentioned about the "contrast". But as you said they don't go hand in hand. You mentioned in the previous slide/comment.. about Higher KVP and Higher Filtration will lead to "Higher Energy" photons. So with "Higher KVP" -- "Energy" of the photons will "Increase" -- and "Contrast" will "Decrease" (as there is more penetrating power)
Sir, I have a question, why does the photon energy remains unchanged when we change the tube current? Please explain sir. P.s. Thank you so much for this amazing video.. Grateful..
Hello Ryan! I have been watching and taking notes from your videos. Do we also need to know the basics of Biochemistry, Physiology and Microbiology? And how to plan the schedule if I had only only 2 months along with my masters course going on.
Thank you for your comment, and I hope the videos have been helpful for you! Yes, there are some basic science questions covered on the board exam. I am actually teaching a live Biochemistry class this coming Saturday, July 22nd if you are interested. You would need to register fairly soon though if you wanted to attend.
More energy does not cause more contrast. On the tube potential slide, I talk about how a higher peak kilovoltage corresponds to lower contrast and a lower peak kilovoltage corresponds to higher contrast. This matches with the table found at the end of the video.
Dr. Ryan, I searched for contrast meaning using UA-cam videos and I found that high contrast refers to more differences between the darkness and lightness results in more dark images and the lower contrast means less differences resulting in more lightish image. However, I saw opposite example mentioned in the lecture. Can you please help me to solve my confusion?
You said increased energy results in higher energy photons which increases contrast. Then you said increasing Tube Potential increases both energy and intensity, therefore shouldn't increasing Tube Potential increase density AND contrast? Why does contrast decrease with increased Tube Potential?
I said that increased tube potential causes an increase in intensity and energy. Increased intensity leads to higher density, while increased energy leads to LOWER contrast. This is reflected in the last slide of the video.
@@123jay456youknowY You know what, you're absolutely right. There are some nuances related to scatter and noise, but I would like to revise the chart at the end. Adding filtration (generally speaking) removes the lower energy photons and increases the penetrating power of the x-ray beam (quality) thereby reducing contrast. Thank you for pointing this out!
Current- Flow of Electrons from Filament to Anode to filament. 🤔🤔 I have a visionary of the X ray tube and its components, and am having difficulty with the concept of current. Can anyone help me here? 🙏🙏
I’m watching your video and I don’t understanding why the doctors say the closer the X-ray beam is to the patients face (source to object) is a better X-ray ? But on here you are saying the distance between source and object the better ? Please help if possible ?
Yes! You can get them one of two ways. You can either sign up on my Patreon page for at least $10/month www.patreon.com/mentaldental or send $30 to me directly via PayPal www.paypal.me/mentaldental
Quick correction! I would like to clarify the table at the end of the video at 22:00. Increasing kVp increases the relative number of photons (quantity) and therefore increases the intensity of the x-ray beam... therefore, the resultant image has increased density. Increasing kVp also increases the mean energy of the beam (quality) which means the beam has more penetrating power... therefore, the resultant image has decreased contrast. Increasing filtration decreases the relative number of photons (quantity) and therefore decreases the intensity of the x-ray beam... therefore, the resultant image has decreased density. All of this is correct as shown in the table! However, this last point I want to make a correction. There are some nuances related to noise and scatter that convolute the issue, so instead I would encourage you to remember this: increasing filtration also INCREASES the mean energy of the beam (quality) by preferentially filtering out the lower energy photons which means the beam has more penetrating power... therefore, the resultant image has DECREASED contrast, not increased contrast.
Hi Ryan . I am a oversea student , when I came Us , English is the second language it’s mean I have study double . I was keeping watching your video every day , everytime I can ( I still work full time and study) . I passed today ! Thank you so much for sharing because Covid times , no school , no one teaching me . Thanks Ryan 🙂!
Congratulations on your pass!! Great job 😁🙌🏼
chúc mừng chị nha
@@khietlinhluongam8382 không e , chị làm phụ tá thôi ^^
Just can't get enough of this High-quality education by @Mental Dental.
Listened to this in the car on my way to take my test and I fully credit this to my passing grade. Perfect refresher and the way you related the answers is very helpful. I appreciate you!
I’m so glad the video helped you! And congratulations on your pass 😁
In much shorter time I'm getting more and more educated AND interested about dentistry topics from Dr. Ryan than from college professors combined, thank you is just not enough🙏🙏💙
Radiology had never been my cuppa tea.. until I started watching your videos! xD
Thank youu for all these simplified explanations! :D
Your video are a Life saver for me, I’m an RDA student , and you help me understand things better. Thank you.
OMG you are the best !!!!! as soon as im done studying my notes i come and watch your videos to get a better understanding .
Amazing work ! Thank you so much on behalf of everyone who watched this!
You're very welcome!
Keep them comming. Radiology's is my favorite because it's the field I want to master thank you for your videos
Trying to study for my DANB Certification and "BAM" I find you. thank you so much I understand Dental X-Rays , Radiation so much more!!!!!!!
I wish my professors in 1980 were so clear. I am retaking boards again,moved states again, need to retake boards. I didn’t get this before. I only beginning. Thank you.
Awesome explanation.
Thanks immensely doc !!!
Really a good Job Dr 👍
Great video!!
Happy Teachers Day!!!😍
These videos really helped me so much .. Thank u !
Thank you for your efforts, much appreciated!
Thanks ❤
thank you so much sir ..i expect ur complete oral radiology videoes as fast as possible .i will b debtful for this.
Hey Ryan, As always great videos with excellent information given in nut shell. In the last slide, the table is stating "Energy" and in the same column it is mentioned about the "contrast". But as you said they don't go hand in hand. You mentioned in the previous slide/comment.. about Higher KVP and Higher Filtration will lead to "Higher Energy" photons. So with "Higher KVP" -- "Energy" of the photons will "Increase" -- and "Contrast" will "Decrease" (as there is more penetrating power)
Yes, that is correct! With both higher kVp and more filtration, there are less low-energy photons and the contrast will decrease as a result.
@@mentaldental thanks doctor ! Your videos are of great help. Thanks for doing all this for us :)
Hello Dr Rayan 😘 love from Pakistan .
I am also a medical Dental Student You're videos Are ❤️❤️Awsom
Amazing amazing amazing 👌
Hi! Can you do someday video about basic CT analysis? Thanks in advance :D youre doing really good job !
Radiation isn’t my best area so I’m hoping your videos will help me. I’m about to take my cda exam 😫
You can do this! Go through the whole playlist of videos one at a time! 😊
Sir, I have a question, why does the photon energy remains unchanged when we change the tube current? Please explain sir.
P.s. Thank you so much for this amazing video.. Grateful..
amazing.go on.
It's better than me reading the same concept for an hour 😢
I’m glad you enjoyed the video!
Thankyouuuu
omg you are the best
Does kV also affect intensity and energy?
Hello Ryan! I have been watching and taking notes from your videos. Do we also need to know the basics of Biochemistry, Physiology and Microbiology? And how to plan the schedule if I had only only 2 months along with my masters course going on.
Thank you for your comment, and I hope the videos have been helpful for you! Yes, there are some basic science questions covered on the board exam. I am actually teaching a live Biochemistry class this coming Saturday, July 22nd if you are interested. You would need to register fairly soon though if you wanted to attend.
awsome
Hey Ryan ,
Can you please share some more slides in radio
If more energy causes more contrast, then acc to the last table why does the contrast decreases with increase in the tube potential?
More energy does not cause more contrast. On the tube potential slide, I talk about how a higher peak kilovoltage corresponds to lower contrast and a lower peak kilovoltage corresponds to higher contrast. This matches with the table found at the end of the video.
@@mentaldental Thank you
Dr. Ryan, I searched for contrast meaning using UA-cam videos and I found that high contrast refers to more differences between the darkness and lightness results in more dark images and the lower contrast means less differences resulting in more lightish image. However, I saw opposite example mentioned in the lecture. Can you please help me to solve my confusion?
That is the correct definition of contrast. Where in my lecture did I give an opposite example?
You said increased energy results in higher energy photons which increases contrast. Then you said increasing Tube Potential increases both energy and intensity, therefore shouldn't increasing Tube Potential increase density AND contrast? Why does contrast decrease with increased Tube Potential?
I said that increased tube potential causes an increase in intensity and energy. Increased intensity leads to higher density, while increased energy leads to LOWER contrast. This is reflected in the last slide of the video.
@@mentaldental I had the same question too. If filtration increases mean energy, why doesn't it lower the contrast?
@@123jay456youknowY You know what, you're absolutely right. There are some nuances related to scatter and noise, but I would like to revise the chart at the end. Adding filtration (generally speaking) removes the lower energy photons and increases the penetrating power of the x-ray beam (quality) thereby reducing contrast. Thank you for pointing this out!
Current- Flow of Electrons from Filament to Anode to filament. 🤔🤔 I have a visionary of the X ray tube and its components, and am having difficulty with the concept of current. Can anyone help me here? 🙏🙏
I’m watching your video and I don’t understanding why the doctors say the closer the X-ray beam is to the patients face (source to object) is a better X-ray ? But on here you are saying the distance between source and object the better ? Please help if possible ?
Sorry at the end I meant you mention on here the distance between the source and object is better increased
when they don't say which distance they mean,we consider it as distance between source and object?(for calculating the effect for density)
Yes, that's correct! When not specified, they are talking about distance from the source.
@@mentaldental thank you
Could someone please send me the link to get the slides including radiology 🙏🏻🙏🏻 i need to buy the slides
Yes! You can get them one of two ways. You can either sign up on my Patreon page for at least $10/month www.patreon.com/mentaldental or send $30 to me directly via PayPal www.paypal.me/mentaldental