Biomaterial Database

A novel alignment device for cone beam computed tomography: principle and application. 2010

A Dawood, and V Sauret-Jackson, and S Patel, and A Darwood

Cavendish Imazing, London, United Kingdom.

OBJECTIVE the aim of this investigation was to optimize the positioning and size of the scanned field of view (FOV) in cone beam CT (CBCT) scanners using a practical external alignment device fitted in the patient's mouth in order to train radiographers and reduce radiation dose to the patient. This is particularly challenging when using small FOVs to cover small volumes of interest. METHODS test objects were positioned and scanned using the aligner to show that the design and geometry were correct and help the radiographer to superimpose the scanner and the volume of interest axis of rotation. An in vivo study was then undertaken comparing the accuracy of patient positioning when using the aligner, instead of scouts, to position the patient for small FOV (cylinders of 4-8 cm height and 4-8 cm diameter) dental scans. The scanners used were the Accuitomo F170 CBCT scanner (Morita, Kyoto, Japan) and the iCAT Next Gen CBCT scanner (Imaging Sciences, Hatfield, PA). RESULTS there was no significant difference in positioning the patient when using the aligner compared with the scout images. CONCLUSIONS it is possible to rely on the aligner for patient positioning for a small volume scan and therefore spare the radiation dose associated with scout imaging.

UI	MeSH Term	Description	Entries
D007568	Jaw	Bony structure of the mouth that holds the teeth. It consists of the MANDIBLE and the MAXILLA.	Jaws
D011861	Radiography, Dental	Radiographic techniques used in dentistry.	Dental Radiography
D004867	Equipment Design	Methods and patterns of fabricating machines and related hardware.	Design, Equipment,Device Design,Medical Device Design,Design, Medical Device,Designs, Medical Device,Device Design, Medical,Device Designs, Medical,Medical Device Designs,Design, Device,Designs, Device,Designs, Equipment,Device Designs,Equipment Designs
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D015898	Tomography Scanners, X-Ray Computed	X-ray image-detecting devices that make a focused image of body structures lying in a predetermined plane from which more complex images are computed.	CAT Scanners, X-Ray,CT Scanner, X-Ray,Computed Tomography Scanners, X-Ray,Tomography, Computed, Scanners,Tomography, X-Ray Computed, Scanners,CAT Scanner, X-Ray,Computed Tomography Scanner, X-Ray,Tomography, X-Ray Computed, Scanner,X-Ray Computed Tomography Scanner,X-Ray Computed Tomography Scanners,CAT Scanner, X Ray,CAT Scanners, X Ray,CT Scanner, X Ray,CT Scanners, X-Ray,Computed Tomography Scanner, X Ray,Computed Tomography Scanners, X Ray,Scanner, X-Ray CAT,Scanner, X-Ray CT,Scanners, X-Ray CAT,Scanners, X-Ray CT,Tomography Scanners, X Ray Computed,X Ray Computed Tomography Scanner,X Ray Computed Tomography Scanners,X-Ray CAT Scanner,X-Ray CAT Scanners,X-Ray CT Scanner,X-Ray CT Scanners
D017076	Computer-Aided Design	The use of computers for designing and/or manufacturing of anything, including drugs, surgical procedures, orthotics, and prosthetics.	CAD-CAM,Computer-Aided Manufacturing,Computer-Assisted Design,Computer-Assisted Manufacturing,Computer Aided Design,Computer Aided Manufacturing,Computer Assisted Design,Computer Assisted Manufacturing,Computer-Aided Designs,Computer-Assisted Designs,Design, Computer-Aided,Design, Computer-Assisted,Designs, Computer-Aided,Designs, Computer-Assisted,Manufacturing, Computer-Aided,Manufacturing, Computer-Assisted
D054893	Cone-Beam Computed Tomography	Computed tomography modalities which use a cone or pyramid-shaped beam of radiation.	CAT Scan, Cone-Beam,Cone-Beam CT,Tomography, Cone-Beam Computed,Tomography, Volume Computed,CT Scan, Cone-Beam,Cone-Beam Computer-Assisted Tomography,Cone-Beam Computerized Tomography,Volume CT,Volume Computed Tomography,Volumetric CT,Volumetric Computed Tomography,CAT Scan, Cone Beam,CAT Scans, Cone-Beam,CT Scan, Cone Beam,CT Scans, Cone-Beam,CT, Cone-Beam,CT, Volume,CT, Volumetric,Computed Tomography, Cone-Beam,Computed Tomography, Volume,Computed Tomography, Volumetric,Computer-Assisted Tomography, Cone-Beam,Computerized Tomography, Cone-Beam,Cone Beam CT,Cone Beam Computed Tomography,Cone Beam Computer Assisted Tomography,Cone Beam Computerized Tomography,Cone-Beam CAT Scan,Cone-Beam CAT Scans,Cone-Beam CT Scan,Cone-Beam CT Scans,Scan, Cone-Beam CAT,Scan, Cone-Beam CT,Scans, Cone-Beam CAT,Scans, Cone-Beam CT,Tomography, Cone Beam Computed,Tomography, Cone-Beam Computer-Assisted,Tomography, Cone-Beam Computerized,Tomography, Volumetric Computed
D056888	Patient Positioning	Moving a patient into a specific position or POSTURE to facilitate examination, surgery, or for therapeutic purposes.	Patient Positionings,Positioning, Patient,Positionings, Patient