What's the difference between collimator and device?

Collimator


Definition:

  • (n.) A telescope arranged and used to determine errors of collimation, both vertical and horizontal.
  • (n.) A tube having a convex lens at one end and at the other a small opening or slit which is at the principal focus of the lens, used for producing a beam of parallel rays; also, a lens so used.

Example Sentences:

  • (1) The dual-probe system incorporates a central collimated probe for monitoring activity in the LV surrounded by an annular detector collimated in such a manner as to provide simultaneous real-time monitoring of the LV background activity.
  • (2) The second area of improved SPECT technology is camera collimation and related imaging techniques.
  • (3) Comparative clinical studies on temporomandibular joints (TMJ) between the LEGP and fan beam collimators also confirm the superior image quality obtained with the fan beam collimator.
  • (4) In work to determine whether X-radiation could be used to induce tumors of the colon in outbred Holtzman rats, a technique was devised so that only the descending colon could be irradiated with a collimated X-ray beam and tumorigenic exposures in the kilo-Roentgen range were delivered.
  • (5) In the RAO view with the collimator flat against the chest there was better resolution of the cardiac apex.
  • (6) As an initial feasibility study of computer-controlled radiation therapy, its application to produce wedge-shaped dose distributions by moving the collimator jaws has been evaluated.
  • (7) Analysis of the penumbra width of cross dose distributions, as a function of field sizes, allowed us to postulate that the dmax shift could be due to the phantom scattered photons, which in turn were generated by the collimator scattered photons.
  • (8) Larger detectors with converging collimation result in much higher photon input rates to the scintillation crystal in routine clinical studies than has occurred in the past.
  • (9) Neutron spectra at various locations in a phantom, irradiated by collimated beams of 14 MeV neutrons and neutrons from 252 Cf and Po-Be sources, were calculated using the Monte Carlo technique.
  • (10) Without scatter, the resolution was 4.7 mm (full width at half-maximum); in a scatter medium, the resolution was 5.3-10.0 mm with high resolution collimation and 7.7-18.8 mm with general purpose collimation, depending on filtering.
  • (11) Quantitative measurement of the scatter dose in polystyrene solid phantoms with a Farmer type chamber and effects of shielding blocks under the collimators were studied.
  • (12) Spatial resolution with parallel-hole or converging collimators was much less satisfactory with Ta-178 because of septal penetration by high-energy photons.
  • (13) Moving the collimator during imaging will reduce septal aberrations but will not increase resolution.
  • (14) The nonuniform response inherent in the use of the pinhole collimator has a significant effect, but with computer processing this is readily eliminated.
  • (15) The exchange of collimator pairs results in significant output differences but has a negligible effect on the depth-dose curves.
  • (16) This was consistent with the design of the line focus and the beam collimators used in this system.
  • (17) One-centimeter collimation contiguous scans through the chest were obtained in all patients.
  • (18) A further increase in photon utization is gained for small-organ imaging with converging collimators, which produce images with superior resolution and sensitivity to that obtained with equivalent parallel-hole collimators.
  • (19) Normal quantitative circumferential profile limits were established for a 30 degrees bilateral rotating slant-hole (RSH) collimator tomographic system.
  • (20) Central axis percentage depth doses and off-axis ratios measured with such a collimator show variations with the source-to-surface distance (SSD).

Device


Definition:

  • (n.) That which is devised, or formed by design; a contrivance; an invention; a project; a scheme; often, a scheme to deceive; a stratagem; an artifice.
  • (n.) Power of devising; invention; contrivance.
  • (n.) An emblematic design, generally consisting of one or more figures with a motto, used apart from heraldic bearings to denote the historical situation, the ambition, or the desire of the person adopting it. See Cognizance.
  • (n.) Improperly, an heraldic bearing.
  • (n.) Anything fancifully conceived.
  • (n.) A spectacle or show.
  • (n.) Opinion; decision.

Example Sentences:

  • (1) Thirty-two patients (10 male, 22 female; age 37-82 years) undergoing maintenance haemodialysis or haemofiltration were studied by means of Holter device capable of simultaneously analysing rhythm and ST-changes in three leads.
  • (2) The reason for the rise in Android's market share on both sides of the Atlantic is the increased number of devices that use the software.
  • (3) Core biopsy with computed tomography (CT) or ultrasound (US) guidance may be such an alternative, particularly when a spring-loaded firing device is used.
  • (4) Socially acceptable urinary control was achieved in 90 per cent of the 139 patients with active devices in place.
  • (5) Good fixation was obtained in 4 cases using Steffee's devices.
  • (6) The image was altered in the expected way, which means that the device is suitable for investigating the possibilities of different filters to improve the diagnostic ability.
  • (7) Streaming is shown to occur in water in the focused beams produced by a number of medical pulse-echo devices.
  • (8) A device allowing pressure to be applied to a local skin site where the skin blood flow is followed using laser Doppler flowmetry is described.
  • (9) While there has been almost no political reform during their terms of office, there have been several ambitious steps forward in terms of environmental policy: anti-desertification campaigns; tree planting; an environmental transparency law; adoption of carbon targets; eco-services compensation; eco accounting; caps on water; lower economic growth targets; the 12th Five-Year Plan; debate and increased monitoring of PM2.5 [fine particulate matter] and huge investments in eco-cities, "clean car" manufacturing, public transport, energy-saving devices and renewable technology.
  • (10) The Nd-Yag-Laser seems to be a useful device in transsphenoidal surgery due to its potent coagulation effect and comfortable handling.
  • (11) However, localizing a functional region with PET has been severely limited by the poor resolving properties of PET devices.
  • (12) The devices worked as well on postphlebitic legs as on normal ones.
  • (13) Ten patients have undergone abdominal proctocolectomy with the formation of an ileal reservoir anastomosed onto the anal canal using a stapling device.
  • (14) The lack of pedestrian crossing devices, crosswalks, or sidewalks, however, was not associated with an increased risk.
  • (15) He added that 45% of traffic to Local World's extensive portfolio of websites – 76 newspaper sites, 26 This is … sites and 400 hyper local sites – comes from mobile devices.
  • (16) The latter animals were raised in an automated feeding device (Autosow) with an artificial diet simulating the nutritional composition of sow milk.
  • (17) "Android’s gain came mainly at the expense of BlackBerry, which saw its global smartphone share dip from 4 percent to 1 percent in the past year due to a weak line-up of BB10 devices," said Strategy Analytics' senior analyst Scott Bicheno.
  • (18) The authors consider that this device increases safety during this potentially hazardous procedure by eliminating the flammable polyvinyl chloride endotracheal tube and cottonoid packings most frequently used during this procedure.
  • (19) A training device is used in conjunction with an exercise program to teach muscle control for retention of a mandibular denture.
  • (20) We also used an optical device to stabilize images of the real world upon the retina.

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