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Phantoms, Imaging
Research News and Information
Definition of 'Phantoms, Imaging'Devices or objects in various imaging techniques used to visualize or enhance visualization by simulating conditions encountered in the procedure. Phantoms are used very often in procedures employing or measuring x-irradiation or radioactive material to evaluate performance. Phantoms often have properties similar to human tissue. Water demonstrates absorbing properties similar to normal tissue, hence water-filled phantoms are used to map radiation levels. Phantoms are used also as teaching aids to simulate real conditions with x-ray or ultrasonic machines. (From Iturralde, Dictionary and Handbook of Nuclear Medicine and Clinical Imaging, 1990) |
Sunday, November 22, 2009
Analysis of factors associated with volumetric data errors in gamma knife radiosurgery.
25 Nov 2009 
OBJECT: Gamma knife (GK) surgery is an important part of the treatment armamentarium for benign and malignant brain tumors. In general, quantitative volumetrical analysis of the tumor on neuroimaging studies is the most reliable method of assessment ... Read more...
4 Oct 2009 PURPOSE: To investigate how segmented multileaf modulation-(sMLM-)based intensity-modulated radiotherapy (IMRT) and dynamic helical tomotherapy (ToTh) affect the peripheral dose (PD) outside the treated region. MATERIAL AND METHODS: A cuboid Perspex ... Read more...
Salivary glands: echo-planar versus PROPELLER Diffusion-weighted MR imaging for assessment of ADCs.
29 Sep 2009 PURPOSE: To compare the image distortion and the quantification variation in parotid gland apparent diffusion coefficients (ADCs) on periodically rotated overlapping parallel lines with enhanced reconstruction (PROPELLER) versus echo-planar ... Read more...
Latest indexed articles for 'Phantoms, Imaging'
These are the very latest articles for this heading:
- Analysis of factors associated with volumetric data errors in gamma knife radiosurgery. 25 Nov 2009
- The influence of different IMRT techniques on the peripheral dose: a comparison between sMLM-IMRT and helical tomotherapy. 4 Oct 2009
- Salivary glands: echo-planar versus PROPELLER Diffusion-weighted MR imaging for assessment of ADCs. 29 Sep 2009
- Radiation dose for body CT protocols: variability of scanners at one institution. 29 Sep 2009
- Early first trimester fetal dose estimation method in a multivendor study of 16- and 64-MDCT scanners and low-dose imaging protocols. 29 Sep 2009
- Assessment of organ absorbed doses and estimation of effective doses from pediatric anthropomorphic phantom measurements for multi-detector row CT with and without automatic exposure control. 29 Sep 2009
- Calculation of indoor effective dose factors in ORNL phantoms series due to natural radioactivity in building materials. 29 Sep 2009
- Image-guided radiotherapy in near real time with intensity-modulated radiotherapy megavoltage treatment beam imaging. 29 Sep 2009
- Physiologic reactions after proton beam therapy in patients with prostate cancer: significance of urinary autoactivation. 29 Sep 2009
- A preliminary study of in-house Monte Carlo simulations: an integrated Monte Carlo verification system. 29 Sep 2009
- Assessment of spatial uncertainties in the radiotherapy process with the Novalis system. 29 Sep 2009
- Measurement of interfraction variations in position and size of target volumes in stereotactic body radiotherapy for lung cancer. 29 Sep 2009
- Single 20-second acquisition of deep-inspiration breath-hold PET/CT: clinical feasibility for lung cancer. 14 Sep 2009
- NEMA NU4-2008 image quality performance report for the microPET focus 120 and for various transmission and reconstruction methods. 14 Sep 2009
- Surface dose in the treatment of breast cancer with helical tomotherapy. 10 Sep 2009
- Gold nanoparticles as a contrast agent for in vivo tumor imaging with photoacoustic tomography. Sep 2009
- Small field-of-view cardiac SPECT can be implemented on hybrid SPECT/CT platforms where data acquisition and reconstruction are guided by CT. 30 Aug 2009
- Numerical and in vivo validation of fast cine displacement-encoded with stimulated echoes (DENSE) MRI for quantification of regional cardiac function. 30 Aug 2009
- General formulation for quantitative G-factor calculation in GRAPPA reconstructions. 30 Aug 2009
- k-t PCA: temporally constrained k-t BLAST reconstruction using principal component analysis. 30 Aug 2009
See a longer list of these articles.
Technical information about 'Phantoms, Imaging'
Definition: Devices or objects in various imaging techniques used to visualize or enhance visualization by simulating conditions encountered in the procedure. Phantoms are used very often in procedures employing or measuring x-irradiation or radioactive material to evaluate performance. Phantoms often have properties similar to human tissue. Water demonstrates absorbing properties similar to normal tissue, hence water-filled phantoms are used to map radiation levels. Phantoms are used also as teaching aids to simulate real conditions with x-ray or ultrasonic machines. (From Iturralde, Dictionary and Handbook of Nuclear Medicine and Clinical Imaging, 1990)
Descriptor UI: D019047
Alternative terms: Phantoms, Imaging; Imaging Phantom; Imaging Phantoms; Phantom, Imaging; Radiologic Phantoms; Phantoms, Radiologic; Phantom, Radiologic; Radiologic Phantom; Radiographic Phantoms; Phantoms, Radiographic; Phantom, Radiographic; Radiographic Phantom;
Allowable Qualifiers: adverse effects; classification; economics; history; microbiology; parasitology; standards; supply & distribution; trends; utilization; veterinary; statistics & numerical data; contraindications; virology; ethics;
Tree Number: E07.671;
History Note: 96
Technical Notes: IM or NIM; coord with specific technique /instrum (IM)