Question 1

Since a key aspect of QA is a visual inspection of the DR image, it is important to consider the capabilities of the QC workstation where we are making decisions.

Accepted Answer

False

Question 2

What is another name for the flowchart of the steps involved in performing a DR exam?

Accepted Answer

A process map is another name for the flowchart of the steps involved in performing a DR (disaster recovery) exam.

Question 3

Radiographic images do not include the patient's name and date of birth; instead, a unique patient identification number is used as the file header.

Accepted Answer

Radiographic images typically include the patient's name and date of birth, or other identifying information, along with a unique patient identification number, to ensure proper identification and maintain patient confidentiality while allowing for accurate record keeping and retrieval.

Question 4

Human errors tend to be systematic and predictable.

Accepted Answer

The answer of Human errors tend to be systematic and...

Question 5

With screen-film radiography, which part of the developed film indicates how much radiation has been used in the examination?

Accepted Answer

OD, or optical density, indicates how much radiation has been used in a screen-film radiography examination. It is measured as the amount of blackening on the developed film, with higher OD indicating more radiation exposure.

Question 6

____ includes all those activities undertaken to get an indication of how well the imaging operation is working.

Accepted Answer

QC (Quality Control) includes activities to ensure that the imaging operation is producing high quality images. This includes regular quality checks, calibrations, and maintenance of equipment to confirm that it is working properly. QA (Quality Assurance) is a broader concept that encompasses all activities aimed at ensuring quality, including QC. AT (Acceptance Testing) is the process of evaluating a new system or software to ensure it meets the specified requirements. IT (Information Technology) refers to the management and use of computer systems in an organization.

Question 7

If erasure is inadequate, the previous exposure is superimposed as ____.

Accepted Answer

When erasure is inadequate, the previous exposure can be superimposed as a ghost image, which is a faint copy of the previous image on the same image receptor. This can result in inaccurate diagnostic interpretation and should be avoided.

Question 8

Technologists are quick to learn that physicians are less likely to reject overexposed DR images than underexposed DR images.

Accepted Answer

This is due to the fact that overexposed images can still provide sufficient diagnostic information, while underexposed images may not provide enough detail for accurate diagnosis.

Question 9

What can build up over time on DR receptors from environmental sources of radiation?

Accepted Answer

Fog can build up over time on DR (Digital Radiography) receptors from environmental sources of radiation, affecting image quality. This phenomenon is not related to physical dust or residue, nor is it a result of contrast media used in imaging.

Question 10

Integrated systems have uniform surfaces to capture the radiographic projection, but the efficiency of collection of stimulated emissions is highly nonuniform across the field of view.

Accepted Answer

This statement is incorrect. Integrated systems have uniform surfaces to capture stimulated emissions, while the efficiency of collection of radiographic projection may vary across the field of view.

Question 11

Each QC system has some sort of registration device that allows direct manual input of demographic and exam information.

Accepted Answer

QC (Quality Control) systems, especially in the context of laboratory or manufacturing processes, primarily focus on monitoring and evaluating the quality of products or processes, rather than directly managing demographic and exam information. Registration or input of such information is typically handled by separate information management systems or databases designed for administrative or patient management tasks.

Question 12

Even with a proper erasure cycle, gross overexposure on the previous exam can leave which of the following?

Accepted Answer

Even with a proper erasure cycle, gross overexposure on the previous exam can leave a residual signal on the imaging plate, which can affect the quality of subsequent images.

Question 13

The DICOM modality worklist (MWL) is a feature designed specifically to take advantage of information that already exists in ____.

Accepted Answer

The DICOM modality worklist (MWL) is designed to take advantage of information that already exists in the Radiology Information System (RIS) to provide a list of scheduled exams for a particular modality. The MWL feature allows for seamless integration between the RIS and modality equipment, reducing errors and saving time by automatically populating patient information and exam details for the technologist. The Health Information System (HIS) and Picture Archiving and Communication System (PACS) do not provide the same level of scheduling and demographic information required for the MWL feature.

Question 14

____ arise from interference with the projected x-ray beam, image receptor defects, and interference with conversion of the captured projection into a digital image.

Accepted Answer

Artifacts are abnormalities or errors in the image that arise from various reasons such as equipment malfunction, patient motion, or interference with the imaging process. Blurred images may arise from motion artifacts or inadequate exposure settings, while gross positioning errors refer to the inaccurate placement of the patient or the equipment that results in distorted images. Duplicate entries are unrelated to imaging and refer to the accidental duplication of information in a medical record.

Question 15

In a PACS, a mismatch between the image header and image database information from RIS generates what are known as "exceptions, " "broken studies, " or "orphans."

Accepted Answer

This statement is true. A mismatch between image header and database information from RIS can result in images being labeled as "exceptions," "broken studies," or "orphans."

Question 16

As fewer x-rays are used to produce a DR image, the image appears less and less noisy.

Accepted Answer

The noise in a DR (Digital Radiography) image is not directly related to the number of x-rays used. Reducing the x-ray dose can actually increase the noise in the image, as there are fewer photons to form a clear image, leading to increased statistical noise.

Question 17

With integrated systems, the receptor needs to be re-exposed to a uniform field to detect the presence of debris.

Accepted Answer

This is true. Integrated systems require the detector or receptor to be re-exposed to a uniform field after each cleaning or flushing process to ensure that any debris or blockages have been removed and the system is functioning properly.

Question 18

Which calibration for nonuniformity must be repeated on a periodic basis?

Accepted Answer

The answer of Which calibration for nonuniformity must be repeated...

Question 19

Technologist supervisors learn quickly to count how many films are in the box at the start-of shift, count again at the end-of-shift, and compare against the number of views produced by all exams during the shift.

Accepted Answer

This practice helps in managing inventory, ensuring that the number of films used matches the number of exams conducted, and identifying any discrepancies that may indicate issues such as wastage or mismanagement of resources.

Question 20

In DR, demographic and exam data accompany the DR image in an electronic file header. What is this called?

Accepted Answer

The accompanying demographic and exam data in the electronic file header are called metadata.

Quiz 10: Quality Control for Digital Radiography