Search results for "Volume correction"

showing 2 items of 2 documents

Blendensysteme für Streulichtphotometer

1973

The geometrical arrangement of slits in the secondary beam of light scattering photometers has been investigated. The hitherto applied configuration of slits, vertically fixed on the secondary beam, requires a volume correction-sinϑ-for the determination of the angle-dependent scattered intensity. Arrangements of slits with varying width which depends on the angle of observation ϑ are proposed. They avoide the volume correction, or render the scattering volume independent of ϑ, and at the same time increase the measuring accuracy.

PhysicsScatteringbusiness.industryAstrophysics::Instrumentation and Methods for AstrophysicsGeneral EngineeringGeneral ChemistryPhotometerVolume correctionLight scatteringlaw.inventionOpticsVolume (thermodynamics)lawLight beamGeneral Materials SciencebusinessIntensity (heat transfer)Beam (structure)Applied physics
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Metabolic impact of Partial Volume Correction of [18F]FDG PET-CT oncological studies on the assessment of tumor response to treatment

2014

AIM: The aim of this work is to evaluate the metabolic impact of Partial Volume Correction (PVC) on the measurement of the Standard Uptake Value (SUV) from [18F]FDG PET-CT oncological studies for treatment monitoring purpose. METHODS: Twenty-nine breast cancer patients with bone lesions (42 lesions in total) underwent [18F]FDG PET-CT studies after surgical resection of breast cancer primitives, and before (PET-I) and after (PET-II) chemotherapy and hormone treatment. PVC of bone lesion uptake was performed on the two [18F]FDG PET-CT studies, using a method based on Recovery Coefficients (RC) and on an automatic measurement of lesion metabolic volume. Body-weight average SUV was calculated f…

Settore ING-INF/05 - Sistemi Di Elaborazione Delle InformazioniPhantoms ImagingReproducibility of ResultsAntineoplastic AgentsBone NeoplasmsBreast NeoplasmsMiddle AgedMultimodal ImagingBone and bonePositron-emission tomography Standardized uptake value Partial volume correction bone metastases therapy monitoringFluorodeoxyglucose F18[18F]FDG PET-CT oncologicalHumansRadiographic Image Interpretation Computer-AssistedFemaleNeoplasm MetastasisPositron-emission tomographyTomography X-Ray ComputedNeoplasm metastasiAged
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