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Daily air or water calibration of the CT system is performed to evaluate:

A. Detector efficiency
B. Tube current
C. Spatial resolution
D. Contrast resolution

Answer :

Final answer:

Daily air or water calibration of the CT system is conducted to evaluate detector efficiency, which affects the quality and accuracy of CT images crucial for diagnostic purposes. The correct answer is a) Detector efficiency

Explanation:

Daily air or water calibration of the CT system is typically performed to evaluate several aspects of the scanner's performance. Specifically, calibration is done to assess the efficiency of the detectors, which are crucial for accurately capturing data during scans. While calibration can involve checks on multiple aspects of the system, the options provided in the question point towards the efficiency of detectors as a primary focus. This helps to ensure that the CT images produced have the necessary quality and accuracy for diagnostics.

Detector efficiency is critical to confirm that the CT system can accurately measure the amount of radiation absorbed, which in turn affects both the contrast and spatial resolution of the image, although contrast resolution more directly relates to the ability to differentiate between subtle differences in tissue densities.

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