Computed Tomography Technologist Practice Exam 2025 - Free CT Technologist Practice Questions and Study Guide

Question: 1 / 615

What exactly does the DAS measure in the imaging process?

The number of photons striking the detector

The DAS, or Digital Acquisition System, plays a crucial role in the imaging process by measuring the number of photons that strike the detector. This measurement is essential because it directly relates to the quality of the image being produced. The more photons detected, the clearer the image will be, as it captures a more accurate representation of the anatomical structures being imaged.

Measuring the photon count is critical for optimizing image formation and ensuring that the proper amount of radiation is used to achieve the best diagnostic results. Variations in photon detection also help technicians adjust for any factors that may affect image quality, such as patient movement or improper alignment.

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The temperature of the imaging system

The speed of image transfer

The exposure dosage to the patient

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