CT Imaging: Basic Technical Concepts

Computed tomography (CT) imaging utilizes various scanning and presentation parameters to generate detailed cross-sectional images of the body. Adjusting these parameters is a balance between image quality and radiation dose. Radiologists and technologists carefully optimize these parameters based on the clinical needs of each individual patient, aiming to achieve a balance between diagnostic image quality and minimizing radiation exposure.

Chapters:
00:00 - Introduction
01:12 - X-Ray Tubes work like Incandescent Light Bulbs
04:28 - Tube Current
05:08 - Gantry Rotation Time
05:59 - Tube Current-Time Product (mAs)
06:27 - Peak Tube Voltage (kVp)
07:28 - Field of View (FOV)
09:19 - Coverage
11:35 - Acquisition Mode
12:42 - Pitch
13:56 - Reconstruction Algorithm
16:34 - Convolution Algorithm (Kernel)
17:14 - Slice Thickness & Interval
18:47 - Window Width & Level
24:41 - Effects of Scanning & Presentation Parameters
28:10 - CTDIvol & DLP
30:11 - Indications for IV Contrast
31:12 - Adverse Outcomes from IV Contrast
33:37 - Intravenous Accesses
35:28 - IV Contrast Injection Volumes
35:59 - Injection Delays & Bolus Tracking
39:04 - Oral Contrast

[vinitpatankar]

how does the CT slice affect the resolution of the image, 16 slice vs 128 or 256 slice

[GntlTch]

Interesting. Thank you for the tutorial.

However, @ 16:07 I do not see any difference in noise but the Filtered Back Projection does seem to be a slightly sharper image than the Iterative Reconstruction. Given that the FBP requires less computer power, why is the IR method preferred?

[oldhounddog]

Love the analogy with Google translate!

[AustinPhiri-dbjt]

more enlightening i enjoyed the lecture

[vinitpatankar]

Sir I am huge fan of your lectures. Will it be possible for you to make a lecture dedicated to chest CT technical aspects? I am a pulmonologist