Scan, SCAN or Scanning may refer to:

Science and technology

Computing and electronics

Graham scan Graham's scan is a method of finding the convex hull of a finite set of points in the plane with time complexity O(''n'' log ''n''). It is named after Ronald Graham, who published the original algorithm in 1972. The algorithm finds all vertices ...

, an algorithm for finding the convex hull of a set of points in the plane *

3D scanning 3D scanning is the process of analyzing a real-world object or environment to collect three dimensional data of its shape and possibly its appearance (e.g. color). The collected data can then be used to construct digital 3D models. A 3D scanner ...

, of a real-world object or environment to collect three dimensional data * Counter-scanning, in physical micro and nanotopography measuring instruments like scanning probe microscope *

Elevator algorithm The elevator algorithm, or SCAN, is a hard disk, disk-I/O scheduling, scheduling algorithm to determine the motion of the disk's arm and head in servicing read and write requests. This algorithm is named after the behavior of a building elevator ...

or SCAN, a disk scheduling algorithm *

Image scanning An image scanner (often abbreviated to just scanner) is a device that optically scans images, printed text, handwriting, or an object and converts it to a digital image. The most common type of scanner used in the home and the office is the flatbe ...

, an optical scan of images, printed text, handwriting or an object *

Optical character recognition Optical character recognition or optical character reader (OCR) is the electronics, electronic or machine, mechanical conversion of images of typed, handwritten or printed text into machine-encoded text, whether from a scanned document, a photo ...

, optical recognition of printed text or printed sheet music * Port scanner, in computer networking *

Prefix sum In computer science, the prefix sum, cumulative sum, inclusive scan, or simply scan of a sequence of numbers is a second sequence of numbers , the summation, sums of Prefix (computer science), prefixes (running totals) of the input sequence: : : : ...

, an operation on lists that is also known as the scan operator *

Raster scan A raster scan, or raster scanning, is the rectangular pattern of image capture and reconstruction in television. By analogy, the term is used for raster graphics, the pattern of image storage and transmission used in most computer bitmap image s ...

, the rectangular pattern of image capture and reconstruction in television *

Scan chain Scan chain is a technique used in design for testing (DFT). The objective is to make testing easier by providing a simple way to set and observe every flip-flop in an IC. It simplifies the testing and debugging of complex digital systems. In scan ...

, a type of manufacturing test used with integrated circuits *

Scan line A scan line (also scanline) is one line, or row, in a raster scanning pattern, such as a line of video on a cathode-ray tube (CRT) display of a television set or computer monitor. On CRT screens the horizontal scan lines are visually discernib ...

, one line in a raster scanning pattern * Screen reading, on computers to quickly locate text elements and images *

Shared Check Authorization Network Shared Check Authorization Network (SCAN) is a database of bad check writers in the United States. The database is used by retailers in order to reduce the number of bad checks received. The database keeps track of those who have written outstandin ...

(SCAN), a database of bad check writers and collection agency for bad checks *

Space Communications and Navigation Program The Space Communications and Navigation (SCaN) program places the three prime NASA space communications networks, Space Network (SN), Near Earth Network (NEN) (previously known as the Ground Network or GN), and the Deep Space Network (DSN), under ...

(SCaN), by NASA

Medical

* Schedules for Clinical Assessment in Neuropsychiatry (SCAN), a set of psychiatric diagnostic tools by WHO *

DMSA scan A DMSA scan is a radionuclide scan that uses dimercaptosuccinic acid (DMSA) in assessing renal morphology, structure and function. Radioactive technetium-99m is combined with DMSA and injected into a patient, followed by imaging with a gamma cam ...

, a radionuclide scan used in kidney studies *

Medical imaging Medical imaging is the technique and process of imaging the interior of a body for clinical analysis and medical intervention, as well as visual representation of the function of some organs or tissues (physiology). Medical imaging seeks to revea ...

, of the interior of a body **

Medical ultrasound Medical ultrasound includes Medical diagnosis, diagnostic techniques (mainly medical imaging, imaging) using ultrasound, as well as therapeutic ultrasound, therapeutic applications of ultrasound. In diagnosis, it is used to create an image of ...

, the medical procedure for examining internal structures, especially when applied to developing foetuses in the womb **

CT scan A computed tomography scan (CT scan), formerly called computed axial tomography scan (CAT scan), is a medical imaging technique used to obtain detailed internal images of the body. The personnel that perform CT scans are called radiographers or ...

(computed tomography scan) **

Magnetic resonance imaging Magnetic resonance imaging (MRI) is a medical imaging technique used in radiology to generate pictures of the anatomy and the physiological processes inside the body. MRI scanners use strong magnetic fields, magnetic field gradients, and ...

, MRI scan * Switch access scanning, a technique that allows users with motor impairments to use a computer using switch access * Partner-assisted scanning, a technique that allows a person with severe disabilities to communicate

Businesses

* Scan Furniture, a former US chain in Washington, D.C., US * SCAN Health Plan, not-for-profit health care company based in Long Beach, California, US * Scan AB or Scan Foods UK Ltd, the Swedish and UK subsidiaries of the Finnish HKScan * Seattle Community Access Network, a former TV channel in Seattle, Washington, US * Scan (company), a software company based in Provo, Utah, US

Publishing

* '' Social Cognitive and Affective Neuroscience'', a scientific journal * ''Scanning'' (journal), a scanning microscopy scientific journal published by Hindawi * '' Scan: Journal of Media Arts Culture'', former online journal published by Macquarie University, Sydney, Australia * ''SCAN'' (newspaper), the student newspaper at Lancaster University, UK

Other uses

Scansion Scansion ( , rhymes with ''mansion''; verb: ''to scan''), or a system of scansion, is the method or practice of determining and (usually) graphically representing the Metre (poetry), metrical pattern of a line of Poetry, verse. In classical poetr ...

, in poetry *

Scan reading Speed reading is any of many techniques claiming to improve one's ability to reading, read quickly. Speed-reading methods include chunking (psychology), chunking and minimizing subvocalization. The many available speed-reading training progra ...