scan

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Related to Bone scan: Bone Density Test, bone density scan

scan

Med
a. the examination of a part of the body by means of a scanner
b. the image produced by a scanner

scan

[skan]
(computer science)
To examine information, following a systematic, predetermined sequence, for some particular purpose.
(electronics)
The motion, usually periodic, given to the major lobe of an antenna; the process of directing the radio-frequency beam successively over all points in a given region of space.
(engineering)
To examine an area, a region in space, or a portion of the radio spectrum point by point in an ordered sequence; for example, conversion of a scene or image to an electric signal or use of radar to monitor an airspace for detection, navigation, or traffic control purposes.
One complete circular, up-and-down, or left-to-right sweep of the radar, light, or other beam or device used in making a scan.

scan

scan
scanclick for a larger image
Two of the techniques for scanning primary flight instruments.
scanclick for a larger image
Scanning by lobe comparison.
i. To search the sky for any hostile aircraft. The area of the scan for a typical two-aircraft formation is indicated in the illustration. In flight, the term means “Search the sector indicated and report any contacts.”
ii. To make a sweep of selected flight instruments or an external scene with the eyes.
iii. The path periodically followed by a radiation beam. See helical scan and conical scanning.
iv. The motion of an electronic beam through space looking for a target. Scanning is carried out by the motion of the antenna or by lobe switching.

SCAN

(1)
["A Parallel Implementation of the SCAN Language", N.G. Bourbakis, Comp Langs 14(4):239-254 (1989)].

SCAN

(2)
A real-time language from DEC.

scan

(3)
(computer peripheral) See scanner.

scan

(4)
(circuit design) See scan design.

scan

(5)
(functional programming) See scanl, scanr.

scan

(storage, algorithm)
An algorithm for scheduling multiple accesses to a disk. A number of requests are ordered according to the data's position on the storage device. This reduces the disk arm movement to one "scan" or sweep across the whole disk in the worst case. The serivce time can be estimated from the disk's track-to-track seek time, maximum seek time (one scan), and maximum rotational latency.

Scan-EDF is a variation on this.

scan

(1) To make an electronic comparison of a signal, pixel or data structure as described in the following definitions.

(2) In optical technologies, to read a printed form a line at a time in order to convert images into bitmapped representations or convert characters into text. See OCR.

(3) In video, to move across a picture frame a line at a time, either to detect the image in an analog or digital camera, or to refresh a CRT display.

(4) To search a data file sequentially for specific content.

(5) To search an executable file for a particular pattern. See antivirus program.

(6) To sequentially search for peripheral devices attached to the computer.
References in periodicals archive ?
For follow-up purposes, the gallium bone scan is best used to delineate the transition from active to inactive osteomyelitis in the skull base.
A high percentage of cancer patients with documented bone scan evidence of metastases show increased urinary excretion of the bone resorption markers pyridinoline and deoxypyridinoline and their associated N-telopeptides (6).
Computer-assisted evaluation of bone scan lesion area (BSLA) was performed and response evaluated by an Independent Radiology Committee (IRC).
The peripheral bone scans used in this study take about 10 minutes to run and cost about $30, Dr.
Your doctor was wise to investigate your problem with both a bone scan and MRI scan.
When both [the bone scan and Paxinos test] are positive in a patient with shoulder pain, the diagnosis of AC [acromioclavioular] joint pain is virtually certain," said Dr.
The England medical staff are now planning a bone scan in the next couple of days to establish the exact nature of the injury, specifically whether there is any damage to the bone.
All patients had bone metastases on bone scan and 46% had measurable soft tissue disease.
She reveals on her blog: "I suffered a pretty severe tibial plateau fracture a few years ago, which led to a bone scan.
SPECIOSA is to have a bone scan to try to find the cause of her mystery lameness.
He will now have a full bone scan and provided that is clear he will be back in full work by the start of next week, so all is not lost when it comes to getting him ready in time for the Guineas.
A bone scan performed by Clippers team physician Tony Daly on Monday confirmed a stress reaction, not a fracture, in Livingston's lower back.