Digital Ch 3

Information is lost when the spatial frequency is greater than the Nyquist frequency, resulting in...(select all that apply)

• wraparound image

• mirroring

• Moire effect

• quantum mottle

Which of the 2 major paths for digital acquisition has the highest potential for loss of signal?

• Indirect

• direct

A graphical representation of all the digitally recorded signals of digital x-ray exposure is called...

A histogram uses the minimum signal and maximum signal to find the ______signal.

• primary

• strongest

• fastest

• useful

The shape of the histogram depends on specific _________.

Rescaling can be used to compensate for poor technical factors.

• true

• false

On the LUT, the brightness can be increased by moving the line _______ the Y axis.

• up

• to the right

• Down

• to the left

If all the shades were left in an image, the contrast would be so _____, it would make it difficult to differentiate the different densities.

• high

• low

Spatial resolution is measured in ......

• lp/mm

• mm

• cm

• intensity

If improper algorithms are applied the image will be ________.