A two-compartment gel phantom for VOI profile measurements in volume-selective 31P spectroscopy in small-bore units is presented. The phantom is cylindrical with two compartments divided by a very thin (30 microm) polyethene film. This thin film permits measurements with a minimum of susceptibility influences from the partition wall. The phantom was used for evaluation of the volume selection method ISIS (image-selected in vivo spectroscopy). The position of the phantom was fixed in the magnet during the measurements, while the volume of interest (VOI) was moved stepwise over the border. The signal from the two compartments was measured for each position and the data were evaluated following differentiation. We have found this phantom suitable for VOI profile measurements of ISIS in small-bore systems. The phantom forms a useful complement to recommended phantoms for small bore-spectroscopy.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1088/0031-9155/43/6/027 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Whole-Brain Vascular Architecture Mapping Identifies Region-Specific Microvascular Profiles In Vivo.
AJNR Am J Neuroradiol
September 2024
Department of Neuroradiology (C.M.M., J.M.E.J., M.B., F.T.K.), Heidelberg University Hospital, Heidelberg, Germany
Background And Purpose: The novel MR imaging technique of vascular architecture mapping allows in vivo characterization of local changes in cerebral microvasculature, but reference ranges for vascular architecture mapping parameters in healthy brain tissue are lacking, limiting its potential applicability as an MR imaging biomarker in clinical practice. We conducted whole-brain vascular architecture mapping in a large cohort to establish vascular architecture mapping parameter references ranges and identify region-specific cortical and subcortical microvascular profiles.
Materials And Methods: This was a single-center examination of adult patients with unifocal, stable low-grade gliomas with multiband spin- and gradient-echo EPI sequence at 3T using parallel imaging.
JN.1 variant in enduring COVID-19 pandemic: is it a variety of interest (VoI) or variety of concern (VoC)?
Horm Mol Biol Clin Investig
June 2024
Department of Physiology, All India Institute of Medical Sciences, Bibinagar, Telangana, India.
The emergence of the SARS-CoV-2 Omicron variant, classified as a Variant of Concern (VoC) in November 2021, marked a significant shift in the COVID-19 landscape. This study investigates the subsequent development of a novel Omicron sublineage, JN.1, which displays distinctive mutations in the spike protein.
View Article and Find Full Text PDFRobustness of [F]FDG PET/CT radiomic analysis in the setting of drug-induced cardiotoxicity.
Comput Methods Programs Biomed
February 2024
Biomedical Engineering and Telemedicine Centre, ETSI Telecomunicación, Center for Biomedical Technology, Universidad Politécnica de Madrid, Avenida Complutense 30, Madrid 28040, Spain; Centro de Investigación Biomédica en Red de Bioingeniería, Biomateriales y Nanomedicina, Instituto de Salud Carlos III, Spain. Electronic address:
Background And Objectives: Standardization of radiomic data acquisition protocols is still at a very early stage, revealing a strong need to work towards the definition of uniform image processing methodologies The aim of this study is to identify sources of variability in radiomic data derived from image discretization and resampling methodologies prior to image feature extraction. Furthermore, to identify robust potential image-based biomarkers for the early detection of cardiotoxicity.
Methods: Image post-acquisition processing, interpolation, and volume of interest (VOI) segmentation were performed.
A single centre intercomparison between commercial treatment planning systems for Y radioembolization using virtual and experimental phantoms.
Phys Med
December 2023
Department of Medical Physics, IRCCS Azienda Ospedaliero-Universitaria di Bologna, 40138, Bologna, Italy. Electronic address:
Introduction: Dedicated Treatment Planning Systems (TPSs) were developed to personalize Y-transarterial radioembolization. This study evaluated the agreement among four commercial TPSs assessing volumes of interest (VOIs) volumes and dose metrics.
Methods: A homogeneous (EH) and an anthropomorphic phantom with hot and cold inserts (EA) filled with Tc-pertechnetate were acquired with a SPECT/CT scanner.
-Glycome Profile of the Spike Protein S1: Systemic and Comparative Analysis from Eleven Variants of SARS-CoV-2.
Biomolecules
September 2023
Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX 79409, USA.
The SARS-CoV-2 virus rapidly spread worldwide, threatening public health. Since it emerged, the scientific community has been engaged in the development of effective therapeutics and vaccines. The subunit S1 in the spike protein of SARS-CoV-2 mediates the viral entry into the host and is therefore one of the major research targets.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!