Exam 5: Data Acquisition Concepts

Seventh-generation scanners use flat-panel digital area detectors.

The overall goal of the electron-beam computed tomography scanner is to produce low-resolution images of moving organs that are free of artifacts caused by motion.

In one type of fourth-generation computed tomography scanner, the tilting action of the detector ring is referred to as:

The change of attenuation and thickness data into transmission measurement is called efficiency conversion.

Match the following data acquisition concepts. All answer selections will be used just once. -Ionization detector

The speed with which a computed tomography detector can detect an x-ray event and recover to detect another event is the:

Optoelectronics refers to the use of lens and light diodes to facilitate data transmission.

Gas ionization computed tomography detectors convert x ray photons into electrical signals with no light conversion process in between.

Electromechanical devices made up of rings and brushes to transmit electrical energy across a rotating interface are called:

Which scanner is based on slip-ring technology?

Scintillation detectors convert x-ray photons to light and subsequently to electrical signals.

Computed tomography detectors generate a signal that represents the attenuation as the ray moves across the slice. This signal is called:

The configuration of the dual-row detector system results in faster volume coverage compared with single-row computed tomography systems.

Which generation of scanners, also called dual-source computed tomography scanners, consists of two x-ray tubes and two sets of detectors?

Which of the following refers to the ability of the computed tomography detector to capture, absorb, and convert x-ray photons into electrical energy?

In which scanner is the apex of the fan beam located outside the detector?

Compared with conventional computed tomography scanners, slip-ring scanners offer the following advantage(s): I. removal of cable wraparound II. elimination of start-stop action III. continuous rotation of x-ray tube and minimal interscan delays

The high-voltage generators of slip-ring scanners are located in the gantry.

Which detector characteristic refers to the steadiness of the detector response?

Which of the following refers to the size, shape, motion, and path traced by the x-ray beam as it scans the patient?