New technique may improve CT scanner calibration

Scientists from the U.S. National Institute of Standards and Technology (NIST)...Read more on AuntMinnie.comRelated Reading: 3D-printed head phantom helps calibrate 7T MRI 3D-printed kidney phantom advances SPECT/CT calibration
Source: Headlines - Category: Radiology Source Type: news

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AbstractObjectiveThe aim of this multicenter prospective study was to compare the sensitivity of18F-fluorodeoxyglucose (FDG)-positron emission tomography/computed tomography (PET/CT) with that of67Ga single photon emission computed tomography (SPECT) for the identification of the site of greatest importance for the final diagnosis of the cause of fever of unknown origin (FUO).MethodsThe study participants consisted of patients with an axillary temperature  ≥ 38.0 °C on ≥ 2 occasions within 1 week, with repeated episodes for ≥ 2 weeks prior to providing c...
Source: Annals of Nuclear Medicine - Category: Nuclear Medicine Source Type: research
A 61-year-old woman diagnosed with left breast cancer underwent a bone scan for the evaluation of possible bone metastases. Multiple foci of elevated activity were noticed in the spine and pelvis. In addition, a focus of intense activity was observed in the right lung on the SPECT/CT images without corresponding anatomic abnormality.
Source: Clinical Nuclear Medicine - Category: Nuclear Medicine Tags: Interesting Images Source Type: research
CONCLUSIONS AND RELEVANCE: Neuropsychological testing and MRI remain the most widely used diagnostic tests by DLB specialists. Other tests-particularly indicative biomarkers-are used only selectively. Research is needed to validate existing potential DLB biomarkers, develop new biomarkers, and investigate mechanisms to improve DLB diagnosis. PMID: 33009039 [PubMed - as supplied by publisher]
Source: Alzheimer Disease and Associated Disorders - Category: Psychiatry Tags: Alzheimer Dis Assoc Disord Source Type: research
AbstractPurpose of ReviewEstablishing a diagnosis of ischemic heart disease (IHD) in women, including assessment for coronary microvascular dysfunction (CMD) when indicated, can be challenging. Access to performance of invasive testing when appropriate may be limited, and noninvasive imaging assessments have evolved. This review will summarize the various noninvasive imaging modalities available for the diagnosis of IHD and CMD in women, outlining indications, performance modalities, advantages, and limitations.Recent FindingsWhile stress echocardiography and single photon emission computed tomography (SPECT) myocardial pe...
Source: Current Atherosclerosis Reports - Category: Cardiology Source Type: research
Conclusion: 99mTc-FAPI-34 represents a powerful tracer for diagnostic scintigraphy, especially when PET imaging is not available. Additionally, the chelator used in this compound allows labeling with the therapeutic nuclide 188Re, which is planned for the near future.
Source: Journal of Nuclear Medicine - Category: Nuclear Medicine Authors: Tags: Basic Source Type: research
AbstractIdiopathic normal pressure hydrocephalus (iNPH) is a debated entity with controversial pathogenesis, diagnostic criteria, and predictors of response after ventriculoperitoneal shunt (VPS). Parkinsonian signs are frequently reported in the clinical picture, sometimes due to the coexistence of an underlying neurodegenerative parkinsonism and sometimes in the absence thereof. To distinguish these two scenarios is crucial, since they may carry different long-term response to CSF drainage.123I-FP-CIT-SPECT was believed to be helpful in this regard, however its role in predicting surgical outcome has been disputed. We il...
Source: Neurological Sciences - Category: Neurology Source Type: research
Conclusion[11C]4 is a potential novel CBF PET tracer. Further validation studies are needed before [11C]4 can be used in humans.
Source: EJNMMI Research - Category: Radiology Source Type: research
CONCLUSIONS: Intravenous DP changed the CBV accompanied by a systemic elevation of L-arginine: this indicates a direct vasorelaxing effect on brain vessels, and an indirect vasodilator effect through L-arginine release presumably via NO. In areas with decreased CBV before DP, such double effects caused transient neurological symptoms presumably due to steal phenomenon. Therefore, intravenous DP may have a potential to identify patients with high risk for cerebral ischemia. PMID: 32945202 [PubMed - as supplied by publisher]
Source: Scandinavian Cardiovascular Journal - Category: Cardiology Tags: Scand Cardiovasc J Source Type: research
This article discusses the measurement of V ˙ A / Q ˙ matching with three broad classes of techniques: (i) those based in gas exchange, such as the multiple inert gas elimination technique (MIGET); (ii) those derived from imaging techniques such as single-photon emission computed tomography (SPECT), positron emission tomography (PET), magnetic resonance imaging (MRI), computed tomography (CT), and electrical impedance tomography (EIT); and (iii) fluorescent and radiolabeled microspheres. The focus is on the physiological basis of these techniques that provide quantitative information for research purposes rather than q...
Source: Comprehensive Physiology - Category: Physiology Tags: Compr Physiol Source Type: research
Siemens Healthineers has introduced a new version of its cardiac SPECT...Read more on AuntMinnie.comRelated Reading: Siemens raises $3.2B to fund Varian acquisition Siemens makes 1st U.S. install of Somatom X.cite CT Siemens's AI-based MRI applications get FDA nod SyntheticMR software compatible with more Siemens scanners Why Siemens-Varian deal is a win-win for both companies
Source: Headlines - Category: Radiology Source Type: news
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