(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.