Multi-slice CT (What killed single slice CT?)

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Multi-slice CT (What killed single slice CT?)

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Күн бұрын

Multi-slice CT is the state-of-the-art for clinical computed tomography (CT) scanning. There was an evolution from single slice CT to multi-slice which happened over several years.
We reveal several reasons why multi-slice CT has taken over and single slice CT is no longer produced for medical CT. These include:
Chapters:
00:00 Slice wars in CT introduction
00:53. A comparison of single slice vs multi-slice architecture.
02:03 Multi-slice CT enables isotropic resolution in reformat images (sagittal and coronal).
03:04. Multi-slice CT has a higher dose efficiency than single slice CT.
04:28. Multi-slice CT makes better use of the x-ray tube power.
05:20. Multi-slice CT can still produce thick slices.
05:44. Multi-slice CT evolution to volume coverage scanning.
07:07. Methods to increase the z resolution (flying focal spot, conjugate ray backprojection).
09:47. Why CT scanners should not be specified by the number of slices.

Пікірлер: 22

@abdovitamins6331 2 жыл бұрын

I really apperciate your exerted efforts to explain it simply 💓👏🌼

@HowRadiologyWorks 2 жыл бұрын

Thanks for the comments Abdo

@abdovitamins6331 2 жыл бұрын

@@HowRadiologyWorks you’re welcome sir.

@yaraelhefnawi7632 Жыл бұрын

Your website is great thank you!

@HowRadiologyWorks Жыл бұрын

Thanks Yara, I appreciate you taking the time to let me know.

@wardogies Жыл бұрын

Could you talk about rotating envelope tubes in ct scanners and how they differ from conventional x-ray tubes just a idea for a video 😊

@HowRadiologyWorks Жыл бұрын

Thanks JMS, I’ll put it on the list. I personally haven’t worked with those yet so it may be some time.

@liveandletlive9392 2 жыл бұрын

Thank you for your explanation. I have one doubt...what determines the slice thickness in single slice CT ..Is it collimator width or detector width.? I understand that in multidetector it is the detector width..

@HowRadiologyWorks 2 жыл бұрын

That’s right for modern scanners the height of each detector is the dominant determinant of z resolution along with the focal spot dimension in z

@soumajitbera2697 Жыл бұрын

Is slice range matter image quality very much or diagnosis is it related with zoom image

@HowRadiologyWorks Жыл бұрын

The slice thickness and range of slices contribute to the image quality. I’m not sure what you mean by zoom images?

@reuelfernandes1075 Жыл бұрын

Is a multiphase ct scan the same as a multislice or multiplanar ct scan

@HowRadiologyWorks Жыл бұрын

Multi phase CT corresponds to multi time points which are image volumes of different a moving object such as lungs or heart. Multi slice is used for all modern scanners.

@reuelfernandes1075 Жыл бұрын

@@HowRadiologyWorks thanks for the reply, is multislice and multiplanar the same scan

@GammaRay25 Жыл бұрын

I am ohh so confused what the difference is between the terms slices, rows, channels, and arrays. I've been reading a lot but am still really struggling to understand these concepts

@GammaRay25 Жыл бұрын

This is how i currently understand it, i don't know if it is correct or if i'm missing something: Rows are the physical detector elements. Channels are what the operator selects to obtain certain slice thicknesses from a row or combination of rows. Rows, channels, and slices are laid along the z direction, while an arrays are laid along the x-axis.

@HowRadiologyWorks Жыл бұрын

If you are looking at the detector it is a big array which will measure a 2D signal or projection. The number of rows is the number of elements in the up down direction, the number of columns is in the left right direction. So the total measurements for each view in the detector array = rows*columns . The number of slices is not exactly tied to these and isn’t the best way to specify a scanner. The number of slices is in a separate space we call the image space

@GammaRay25 Жыл бұрын

@@HowRadiologyWorksI see now. It just really irks me that Bushberg doesn't once mention the word "row" in the entire CT chapter. I'm thinking he replaced "row" with "array"