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Quality control of a laser camera with the SMPTE test pattern: optical density variations with printing format and frame position

¹ Medical Physics Unit, ² Radiology Department and ³ Computed Tomography Department, ‘Konstantopoulio-Agia Olga’ Hospital, 3–5 Agias Olgas, Nea Ionia, 142 33, Athens, Greece

View larger version (142K): [in a new window]   Figure 1. The Society of Motion Picture and Television Engineers (SMPTE) test pattern.

View larger version (24K): [in a new window]   Figure 2. The variation of the optical density (OD) values of selected patches of the Society of Motion Picture and Television Engineers (SMPTE), the contrast index (CI) and the step 11 of the monitor greyscale with frame number for the x 20 format. The frames have been numbered starting from the upper left corner and the vertical lines indicate the start of each one of the 5 rows of frames.