Podcast Beta
Questions and Answers
A charge-coupled device (CCD) converts light or x-ray photons into an electrical charge or signal.
True
A digital image is composed of line pairs per millimeter (lp/mm).
False
Indirect digital imaging requires a sensor to be scanned after exposure to x-radiation.
True
An 8 bit-depth image can represent 128 shades of gray.
Signup and view all the answers
Digital subtraction is a technique that makes black images appear white and white images appear black.
Signup and view all the answers
Storage phosphor imaging captures an image using a phosphor-coated plate that is scanned with a laser.
Signup and view all the answers
Digital imaging relies on a conventional film to capture images.
Signup and view all the answers
Direct digital imaging involves exposing an intraoral sensor to x-radiation to capture dental images.
Signup and view all the answers
Pixels are defined as discrete units of information in digital electronic images.
Signup and view all the answers
The term 'digitize' refers to converting an image into analog form.
Signup and view all the answers
Study Notes
Digital Imaging
- Digital imaging is a method of capturing an image using a sensor, breaking it into electronic pieces, and presenting and storing the image using a computer and related imaging software.
- Digital image is composed of pixels, which are discrete units of information.
- Analog-to-digital converter converts data elements acquired by the sensor from analog to digital form.
- Bit-depth image determines the number of possible gray-scale combinations for each pixel. An 8-bit depth image has 256 shades of gray (2⁸).
- Digital subtraction is a method of reversing the gray scale as an image is viewed. Radiolucent images (normally black) appear white, and radiopaque images (normally white) appear black.
- Line pairs/millimeter (lp/mm) is a measurement used to evaluate the computer's ability to capture the resolution (or detail) of an image.
Digital Image Acquisition
- Direct digital imaging uses an intraoral sensor exposed to x-radiation to capture a dental image that can be viewed on a computer monitor.
- Indirect digital imaging uses a sensor scanned after exposure to x-radiation and then converted into a digital form that can be viewed on a computer monitor.
- Storage phosphor imaging records the image on a phosphor-coated plate, which is then placed into an electronic processor and scanned by a laser to produce an image on a computer monitor.
Key Components
- Sensor: A receptor used to capture intraoral or extraoral images in digital imaging.
- Charge-coupled device (CCD): A solid-state silicon chip detector that converts light or x-ray photons into an electrical charge or signal. This is found in the sensor.
Other Terms
- Nalog image: A radiographic image produced by conventional film.
- Digitize: To convert an image into a digital form that can be processed by a computer.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
This quiz covers the fundamentals of digital imaging and the techniques used in digital image acquisition. Explore concepts such as pixel composition, analog-to-digital conversion, and image resolution measurements. Ideal for those studying imaging technologies in healthcare.
