What's the difference between image and phantom?

Image


Definition:

  • (n.) An imitation, representation, or similitude of any person, thing, or act, sculptured, drawn, painted, or otherwise made perceptible to the sight; a visible presentation; a copy; a likeness; an effigy; a picture; a semblance.
  • (n.) Hence: The likeness of anything to which worship is paid; an idol.
  • (n.) Show; appearance; cast.
  • (n.) A representation of anything to the mind; a picture drawn by the fancy; a conception; an idea.
  • (n.) A picture, example, or illustration, often taken from sensible objects, and used to illustrate a subject; usually, an extended metaphor.
  • (n.) The figure or picture of any object formed at the focus of a lens or mirror, by rays of light from the several points of the object symmetrically refracted or reflected to corresponding points in such focus; this may be received on a screen, a photographic plate, or the retina of the eye, and viewed directly by the eye, or with an eyeglass, as in the telescope and microscope; the likeness of an object formed by reflection; as, to see one's image in a mirror.
  • (v. t.) To represent or form an image of; as, the still lake imaged the shore; the mirror imaged her figure.
  • (v. t.) To represent to the mental vision; to form a likeness of by the fancy or recollection; to imagine.

Example Sentences:

  • (1) In Patient 2 they were at first paroxysmal and unformed, with more prolonged metamorphopsia; later there appeared to be palinoptic formed images, possibly postictal in nature.
  • (2) In addition, intravenous injection of complexes into rabbits showed optimal myocardial images with agents of intermediate lipophilicity.
  • (3) Multiple overlapping thin 3D slab acquisition is presented as a magnitude contrast (time of flight) technique which combines advantages from multiple thin slice 2D and direct 3D volume acquisitions to obtain high-resolution cross-sectional images of vessel detail.
  • (4) His son, Karim Makarius, opened the gallery to display some of the legacy bequeathed to him by his father in 2009, as well as the work of other Argentine photographers and artists – currently images by contemporary photographer Facundo de Zuviria are also on show.
  • (5) The tumors were identified by magnetic resonance (MR) imaging.
  • (6) Type 1 changes (decreased signal intensity on T1-weighted spin-echo images and increased signal intensity on T2-weighted images) were identified in 20 patients (4%) and type 2 (increased signal intensity on T1-weighted images and isointense or slightly increased signal intensity on T2-weighted images) in 77 patients (16%).
  • (7) Twenty patients with non-small cell bronchogenic carcinoma were prospectively studied for intrathoracic lymphadenopathy using computed tomography (CT) and magnetic resonance imaging (MRI).
  • (8) Therefore, we have developed a powerful new microcomputer-based system which permits detailed investigations and evaluation of 3-D and 4-D (dynamic 3-D) biomedical images.
  • (9) Past imaging techniques shown in the courtroom have made the conventional rules of evidence more difficult because of the different informational content and format required for presentation of these data.
  • (10) As the requirements to store and display these images increase, the following questions become important: (a) What methods can be used to ensure that information given to the physician represents the originally acquired data?
  • (11) The role of magnetic resonance imaging is also discussed, as is the pathophysiology, management, and prognosis in the elderly patient.
  • (12) In 14 of the patients the imaging results were checked against the histological findings of a subsequent thymectomy, which revealed four thymomas and (with the exception of one normal thymus) hyperplastic changes in all the others.
  • (13) Although MR imaging can accurately show high-grade chondromalacia patellae, it is less accurate in the detection of low-grade disease.
  • (14) "With hyperspectral imaging, you can tell the chemical content of a cake just by taking a photo of it.
  • (15) All masses had either histologic confirmation (n = 11) or confirmation with other imaging modalities (n = 4).
  • (16) Delineation of the presence and anatomy of an obstructed, nonfunctioning upper-pole duplex system often requires multiple imaging techniques.
  • (17) 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.
  • (18) This survey reviews three-dimensional (3D) medical imaging machines and 3D medical imaging operations.
  • (19) This method provided myocardial perfusion images of high quality which were well correlated with N-13 ammonia images.
  • (20) Sonographic images of the gallbladder enable satisfactory approximation of gallbladder volume using the sum-of-cylinders method.

Phantom


Definition:

  • (n.) That which has only an apparent existence; an apparition; a specter; a phantasm; a sprite; an airy spirit; an ideal image.

Example Sentences:

  • (1) This is due to changes with energy in the relative backscattered electron fluence between chamber support and phantom materials.
  • (2) To know the relation between the signal intensity and sodium concentration, sodium concentration--signal intensity curve was obtained using phantoms with various sodium concentrations (0.05-1.0%).
  • (3) This technique is compared with calculated outline and ring source attenuation correction techniques in a pie phantom.
  • (4) To evaluate image quality a perspex phantom with image quality test objects was used.
  • (5) The validity of the response of this probe to Y-90 and its clinical application were assessed with a phantom containing varying activities and with biopsy samples obtained from patients being treated with SIR therapy.
  • (6) Preliminary heating patterns studied in phantoms indicate the possibility of treating volumes greater than 2000 cm3 within the 50 per cent isotherm.
  • (7) With the addition of a preservative, the phantom could be used for experiments on heating, without degeneration, for over one year.
  • (8) Diffusion coefficients measured on images of water and acetone phantoms were consistent with published values.
  • (9) The incidence of phantom pain and nonpainful phantom sensations was 13.3% and 15.0%, respectively, 3 weeks after mastectomy, 12.7% and 11.8%, respectively, after a year, and 17.4% and 11.8%, respectively, after 6 years.
  • (10) Phantom studies simulating clinical conditions showed no significant difference in performance at 140 keV.
  • (11) In addition, normalized organ dose to the breast, active bone marrow, thyroid, eyes, ovaries, and testes were measured in a pediatric anthropomorphic phantom comparing the anteroposterior and posteroanterior projections.
  • (12) Studies carried out on the phantom have shown how reliable transverse diameter measurements of the pelvis are when carried out by X-Ray scanning pelvimetry compared with conventional X-Ray pelvimetry.
  • (13) A comparison is made between five irradiation methods, the dose distribution and volume doses of which had been ascertained by means of two phantoms presupposed differently large.
  • (14) 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.
  • (15) The phantom combines an inhalation system which allows for the simulation of xenon buildup or washout in the arterial blood as well as a multisection translatable cylinder in which several sections can be scanned during a preselected protocol to simulate the CT enhancement in brain tissue during a study.
  • (16) The measurements show that the machine outputs are only slightly dependent on phantom size; the percentage depth dose distributions, however, are strongly dependent on the phantom size, suggesting that machine data for total body irradiations should be measured in phantoms whose dimensions approximate the patient during the total body irradiation.
  • (17) The Greeks could be delivering an answer to a phantom question.
  • (18) Quantitative analysis of MR images included fat signal fraction for animals, and relative signal decrease between in-phase and opposed-phase images for phantom and human data.
  • (19) Relative dose functions for 125I for these phantom media are fitted to second-degree polynomials.
  • (20) The supplied reference rods were scanned in different positions within the lung fields of the phantom and with varied chest wall thicknesses.