How Well Does Dual-Energy Computed Tomography With Metal Artifact Reduction Software Improve Image Quality and Quantify Computed Tomography Number and Iodine Concentration?

The objective of this study was to assess the accuracy of the quantitative measurements obtained using dual-energy computed tomography with metal artifact reduction software (MARS). Methods Dual-energy computed tomography scans (fast kV-switching) are performed on a phantom, by varying the number of metal rods (Ti and Pb) and reference iodine materials. Objective and subjective image analyses are performed on retroreconstructed virtual monochromatic images (VMIs) (VMI at 70 keV). Results The maximum artifact indices for VMI-Ti and VMI-Pb (5 metal rods) with MARS (without MARS) were 17.4 (166.7) and 34.6 (810.6), respectively; MARS significantly improved the mean subjective 5-point score (P
Source: Journal of Computer Assisted Tomography - Category: Radiology Tags: CT Phyics Source Type: research

Related Links:

CONCLUSIONS: In Romanian population, the MMC of mandibular first molars, when present, is commonly associated with a second distal canal, unlike the mandibular second molars where the occurrence of a MMC was associated with only one distal canal. When performing the preoperative evaluation, it has also to be considered the patient gender, since the male∕female ratio of MMC was 1:3 in mandibular first molars and 5:1 in mandibular second molars. PMID: 32239106 [PubMed - in process]
Source: Romanian Journal of Morphology and Embryology - Category: General Medicine Tags: Rom J Morphol Embryol Source Type: research
CONCLUSION: In the early stage of COVID-19 CRP levels were positively correlated with lung lesions and could reflect disease severity. PMID: 32243911 [PubMed - as supplied by publisher]
Source: Medecine et Maladies Infectieuses - Category: Infectious Diseases Tags: Med Mal Infect Source Type: research
CONCLUSION: The septal swell body is a dynamic structure that varies in width over time in close correlation to the inferior turbinates. Further research is required to quantify its relevance as a surgical area of interest. PMID: 32241312 [PubMed - as supplied by publisher]
Source: Journal of Laryngology and Otology - Category: ENT & OMF Tags: J Laryngol Otol Source Type: research
CONCLUSION: The prodromal symptoms of COVID-19 were mild and most patients did not have limitations of daily activity. Viral shedding from URT was high from the prodromal phase. Radiological pneumonia was common from the early days of illness, but it was frequently not evident in simple CXR. These findings could be plausible explanations for the easy and rapid spread of SARS-CoV-2 in the community. PMID: 32242348 [PubMed - in process]
Source: J Korean Med Sci - Category: General Medicine Authors: Tags: J Korean Med Sci Source Type: research
CONCLUSION: The absence of vasospasm in the first DSA performed in patients with SAH and negative tomographic angiography could be a useful criterion for establishing an optimal follow-up protocol in these patients, without exposing them to unnecessary risks and radiation. PMID: 32242335 [PubMed - in process]
Source: Revista de Neurologia - Category: Neurology Authors: Tags: Rev Neurol Source Type: research
CONCLUSION: Penetrating trauma in children and adolescents is associated with significant mortality and morbidity. There are similarities with the management of these injuries in adults, but further work is required to ensure that paediatric management algorithms are evidence based. PMID: 32243113 [PubMed - as supplied by publisher]
Source: South African Journal of Surgery - Category: Surgery Tags: S Afr J Surg Source Type: research
Publication date: Available online 3 April 2020Source: The Journal of Foot and Ankle SurgeryAuthor(s): Zongyu Zhong, Peng Zhang, Hao Duan, Hao Yang, Qing Li, Fei He
Source: The Journal of Foot and Ankle Surgery - Category: Orthopaedics Source Type: research
Authors: Steinmetz RG, Maupin JJ, Johnson EB, Cantrell AJ, Fox JA, Bernhardt JA, Pasque CB, Teague DC Abstract INTRODUCTION: Extra-articular scapula body fractures have been shown to have good outcomes with nonsurgical management. What is not known is whether routine postinjury imaging of these fractures is necessary for monitoring healing and alignment. As the shift toward providing cost-effective healthcare continues, we sought to evaluate if routine postinjury imaging of these fractures resulted in any change in management while secondarily evaluating the imaging for fracture patterns at risk of displacement. ...
Source: The Journal of the American Academy of Orthopaedic Surgeons - Category: Orthopaedics Tags: J Am Acad Orthop Surg Source Type: research
AbstractPurposeTo assess skull bone thickness from birth to skeletal maturity at different sites to provide a reference for the correct selection of pin type and pin placement according to age.Methods270 children and adolescents (age: 0 –17 years) with a normal CT scan obtained at Emergency Department for other medical reasons were included. Skull thickness was measured on the axial plane CT scans at eight different sites of the vault: midline anterior (A) and posterior (P), right and left lateral (L), antero-lateral (AL), poste ro-lateral (PL).ResultsFrom birth to skeletal maturity, L thickness was increased si...
Source: European Spine Journal - Category: Orthopaedics Source Type: research
We examined the clinical applicability of drip-infusion cholangiography (DIC) acquired on an ultra-high-resolution CT (U-HRCT) scanner reconstructed with DLR in comparison to hybrid and model-based iterative reconstruction (hybrid-IR, MBIR).MethodsThis retrospective, single-institution study included 30 patients seen between January 2018 and November 2019. A radiologist recorded the standard deviation of attenuation in the paraspinal muscle as the image noise and calculated the contrast-to-noise ratio (CNR) in the common bile duct. The overall visual image quality of the bile duct on thick-slab maximum intensity projection...
Source: Abdominal Imaging - Category: Radiology Source Type: research
More News: Computers | CT Scan | Iodine | PET Scan | Study