Good Day Doctor, In the CT scan series description for a brain CT, it says "Base 0.75 H31s," while for different series, it says "Base 4.5 H60s." On internet dose report pages, I see "head" written. Is it normal for my dose report to say "base" instead of "head"? It seems like the cerebellum is not included in the imaging values because it says "base" instead of "head." On the internet, I see scans for brain CT described as "base+cere," but my scan with Siemens 16 Sensation only mentions "base." Are the details in the Series Description the same as in the Dose Report, and if one says "base," should the other also say "base"? Or have only the base region values been included in my imaging values? Therefore, is it not accurate to say total DLP is 927? Thank you in advance for your response.
Sorry we don’t comment on specifics of medical exams. The different series have different reconstruction kernels. The dose report shows include all doses.
Last sentence is help me a lot doctor, so It means Even though the Study Description and dose reports mention "base" instead of "head" the values are for the entire scan. Thank you
@@arceem870 yes the bow tie filter does reduce dose by filtering out X-rays on the way to the patient so that towards the outside of the patient there will be less X-rays. We would not want to put on detector thoughts as those X-rays have been through the patient so we don’t want to filter. The exception is an anti scatter grid as we do want to remove scattered X-rays before they hit the detector
🎯 Key Takeaways for quick navigation: 00:00 🔄 *CT scanners consist of a rotating gantry that houses various components crucial for image acquisition.* 01:37 📏 *Different types of filters, such as flat filters and bowtie filters, are used in CT scanners to adjust x-ray spectra and reduce patient dose.* 04:36 🎯 *Collimators control the shape and size of the x-ray beam in CT scanning, with collimation specifications typically set at the iso center of the system.* Made with HARPA AI
Alright, alright, another great video Dr. Nett ;)
Thanks Prof Tim😏
Good Day Doctor, In the CT scan series description for a brain CT, it says "Base 0.75 H31s," while for different series, it says "Base 4.5 H60s." On internet dose report pages, I see "head" written. Is it normal for my dose report to say "base" instead of "head"? It seems like the cerebellum is not included in the imaging values because it says "base" instead of "head." On the internet, I see scans for brain CT described as "base+cere," but my scan with Siemens 16 Sensation only mentions "base." Are the details in the Series Description the same as in the Dose Report, and if one says "base," should the other also say "base"? Or have only the base region values been included in my imaging values? Therefore, is it not accurate to say total DLP is 927? Thank you in advance for your response.
Sorry we don’t comment on specifics of medical exams. The different series have different reconstruction kernels. The dose report shows include all doses.
Last sentence is help me a lot doctor, so It means Even though the Study Description and dose reports mention "base" instead of "head" the values are for the entire scan.
Thank you
verry clear explaind thank you, can you explain the pre detectror collimator as well.
Will put it on the list
What parameters control the bow tie filter used? My assumption is the scanned FOV…is this accurate?
Yeah that’s right
on modern CT scanners does each detector have a separate collimator? thanks
There are a variety of designs but usually the xy collimator is for every detector column and the z collimator is usually a little less frequent
شرح مميز ماشاء الله
Thanks
So it lowers the patient dose, right sir? Can it be also attached to the detector?
I'm referring to the bow tie filter by the way
@@arceem870 yes the bow tie filter does reduce dose by filtering out X-rays on the way to the patient so that towards the outside of the patient there will be less X-rays. We would not want to put on detector thoughts as those X-rays have been through the patient so we don’t want to filter. The exception is an anti scatter grid as we do want to remove scattered X-rays before they hit the detector
@@HowRadiologyWorks Oh! I see, thank you so much sir. That cleared my confusions
🎯 Key Takeaways for quick navigation:
00:00 🔄 *CT scanners consist of a rotating gantry that houses various components crucial for image acquisition.*
01:37 📏 *Different types of filters, such as flat filters and bowtie filters, are used in CT scanners to adjust x-ray spectra and reduce patient dose.*
04:36 🎯 *Collimators control the shape and size of the x-ray beam in CT scanning, with collimation specifications typically set at the iso center of the system.*
Made with HARPA AI