American Society of Radiologic Technologist (ASRT) Practice Exam

In Digital Radiography, which component helps with image acquisition?

1. Layer of photostimulable phosphor

2. Digital imaging and communications in medicine (DICOM)

3. Modality worklist

4. Radiology information system (RIS)

The correct answer is: Layer of photostimulable phosphor

In Digital Radiography, the layer of photostimulable phosphor plays a critical role in the image acquisition process. This layer is primarily responsible for capturing and storing the x-ray energy that is absorbed during the imaging procedure. When the exposure occurs, the photostimulable phosphor retains the energy and later releases it as visible light when stimulated by a specific laser in the imaging system. This emitted light is then converted into a digital signal, allowing for the creation of the final radiographic image. The other options, while integral to the overall digital radiography workflow, do not directly contribute to the acquisition of images. Digital Imaging and Communications in Medicine (DICOM) is a standard used for exchanging and managing medical imaging information but does not capture images itself. A modality worklist is utilized to manage and streamline patient scheduling and imaging orders, ensuring that the correct protocols and patient information are retrieved, but again, it does not influence the direct capture of images. Lastly, a Radiology Information System (RIS) is focused on managing patient data and imaging workflows but is not involved in the process of acquiring actual radiographic images. Thus, the essential role of the layer of photostimulable phosphor in acquiring images makes it the correct answer to the