PADLET 4 by https://padlet.com/gomezt2_1/89tc4cr3p7t6eu6q en-us 2025-03-23 00:49:33 UTC 2025-03-23 01:09:37 UTC hello@padlet.com https://padlet.net/icons/png/1f9e0.png Describe the relationship between CT numbers and linear attenuation coefficient gomezt2_1 https://padlet.com/gomezt2_1/89tc4cr3p7t6eu6q/wish/3377750630 Hounsfield unit values correspond directly to linear attenuation coefficients: 1HU equals 0.1% difference between the attenuation coefficients of tissue and water. Hounsfield units (HU)- measure the ability of a material to cause beam attenuation.

]]> 2025-03-23 00:56:47 UTC https://padlet.com/gomezt2_1/89tc4cr3p7t6eu6q/wish/3377750630 Define window width (WW) and window level (WL). gomezt2_1 https://padlet.com/gomezt2_1/89tc4cr3p7t6eu6q/wish/3377752851 Window width (WW): The range of the numbers in the image, also known as the range of Hounsfield Units (HU) displayed as shades of gray on the image.


Window level (WL): The center of the range

]]> 2025-03-23 01:04:06 UTC https://padlet.com/gomezt2_1/89tc4cr3p7t6eu6q/wish/3377752851 Explain the relationship between pixel size, the field of view (FOV) and matrix size gomezt2_1 https://padlet.com/gomezt2_1/89tc4cr3p7t6eu6q/wish/3377753784 The matrix size is the number of pixels in the images. Increasing the matrix size will increase the number of pixels in the image but, as they are still within the same field of view, they would be smaller.

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