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Table 1 The different sub-classes of bad spots.

From: MASQOT: a method for cDNA microarray spot quality control

Class

Description

not bad

No issue. Contains all spots with no apparent problems according to the classification by the three experienced users.

HIFI

High-Intensity Foreground Issue. Typically intensity distribution issues, such a dye debris in the foreground region or donut-shaped spots, with very distinct characteristics.

LIFI

Low-Intensity Foreground Issue. Weak intensity distribution issues in the foreground region or morphological issues.

HIBI

High-Intensity Background Issue. Typically intensity distribution issues, such a dye debris in the background region, with very distinct characteristics.

LIBI

Low-Intensity Background Issue. Weak intensity distribution issues or faint increases in noise level in the background region.

HIFI/HIBI

A combination of HIFI and HIBI.

HIFI/LIBI

A combination of HIFI and LIBI.

LIFI/HIBI

A combination of LIFI and HIBI.

LIFI/LIBI

A combination of LIFI and LIBI.

HIFI/LIFI

A combination of HIFI and LIFI.

HIFI/LIFI/HIBI

A combination of HIFI and LIFI and HIBI.