The asker opted for community grading. The question was closed on 2010-12-11 17:54:10 based on peer agreement (or, if there were too few peer comments, asker preference.)
|English to Portuguese translations [PRO]|
Tech/Engineering - Medical: Instruments / EQUIPAMENTO
|English term or phrase: PHANTOM|
|Image performance quality assurance|
Imaging performance of the scanner is checked by scanning head and body system phantoms.
When testing image quality, the system should be properly calibrated.
This chapter covers information on these areas:
Head and body phantom.
Quality assurance checks-daily and monthly.
Read this section carefully and follow all instructions regarding scheduling and performance of quality assurance checks.
These instructions represent the manufacturer’s required QA performance checks. If additional testing is required by your national or local authorities, please contact your Philips Service representative.
Do not raise the couch to its maximum vertical height when the head or body phantom is mounted to the system couch. The phantoms may collide with the gantry covers.
Head & body system performance phantom
The primary test phantom used for these tests is a two part system phantom. This phantom set is supplied as part of every iCT system. The phantom set consists of a Head section and a separate body section, mounted on a phantom holder. Illustration shows the entire phantom
Influência da variação angular do “gantry” na dose absorvida de raios-X nos exames de TC de crânio
A dosimetria na Tomografia Computadorizada (TC) é relevante devido a probabilidade de indução de catarata nas investigações de patologias de crânio. Os parâmetros responsáveis pelas doses estão relacionados a producao dos raios -X, .... Neste trabalho, verificamos a influência da variação angular do ‘gantry” no intervalo de -5 a 2, na dose absorvida de radiação... Utilizamos um simulador de cabeça e 40 dosimetros TLD100 inseridos em tubos acrilicos.
Influence of the gantry angulation variation in the absorbs dose in the skull CT examinations
The radiation dose evaluation is particularly important for infants and children’s CT examinations since the risk of inducing cataract formation has to be considered when this method is used as follow- up of cranial pathologies. The characteristics of dose profile of a slice are influenced by factors as voltage, ... In this work we have studied the influence of the gantry angulation variation, ... We have used an acrylic head phantom and 40 TLD100 inserted in an acrylic tube.
Note added at 4 hrs (2010-12-08 05:20:51 GMT)
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