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 ?
Bone scan was performed at 3 months after surgery to confirm the vascularity of the grafted fibula and changes in vascularity of the femoral head.
When to perform preoperative bone scan for kidney cancer staging.
Radiographs showed an indistinct, incomplete fracture of left femoral midshaft (Figure 7) (a) which was similar to previous fracture of right femur and bone scan showed increased uptake in the left femoral midshaft (Figure 7) (b).
The less expensive machines brought down the price of bone scans.
It is easily diagnosed on x-ray (I ordered the bone scan because I was looking for cancer).
NEW YORK -- Overtreatment for low bone mass has been all too common in women aged 50-60 years since the introduction of the bisphosphonate drugs and the widespread use of bone scans, according to Dr.
The bone scan demonstrated 3 areas of increased radioisotope uptake in the right lateral ribs, which is indicative of rib fracture.
Even when a stress fracture is indicated, X-rays call be negative, therefore a doctor may often decide to order more sophisticated studies, such as a bone scan or MRI.
A precautionary MRI scan was taken yesterday and showed no sign of recent bone injury, but in order to provide further re-assurance to Simon,it was decided that he undergo a bone scan.
In June of this year, when I had some pain,I was given an ET scan and a bone scan,followed by a kidney and liver scan in three different hospitals,not bad for my age, 79.
When both [the bone scan and Paxinos test] are positive in a patient with shoulder pain, the diagnosis of [acromiodavicular] AC joint pain is virtually certain," said Dr.