Table 2.

ENNPS correlation with tomosynthesis scan parameters. The symbol “+” or “−” indicates an increase or decrease in the ENNPS as the scan parameter is increased (i.e., positive or negative correlation, respectively). An “X” is used to indicate a table entry that does not apply to a given imaging technique.

	N	ANG	NP	Plane location (distance from detector)
Raw projections	None	−	X	X
Conventional tomosynthesis	+ at low frequencies, − at mid and high frequencies	− at low frequencies, + at mid and high frequencies	X	Increased low-frequency noise in anterior planes, and mid- and high-frequency noise spikes in central and posterior planes
MITS	− at low and mid frequencies	+ at low and mid frequencies	− at low and mid frequencies	Increased low- and mid-frequency noises in both anterior and posterior planes