Noise reduction and image quality in ultra-high resolution computed tomography of the temporal bone using advanced modeled iterative reconstruction.
Noise reduction and image quality in ultra-high resolution computed tomography of the temporal bone using advanced modeled iterative reconstruction. Acta Radiol. 2019 Jan 08;:284185118820699 Authors: Hempel JM, Niklas Bongers M, Braun K, Ernemann U, Bier G Abstract BACKGROUND: The novel advanced modeled iterative reconstruction (ADMIRE) algorithm in ultra-high-resolution (UHR) computed tomography (CT) of the temporal bone has not yet been systematically evaluated. PURPOSE: To assess the potential of ADMIRE in temporal bone UHR CT. MATERIAL AND METHODS: Forty-four patients who underwent UHR CT of the temporal bone using z-axis UHR protocol were retrospectively selected for analysis. Images were reconstructed using filtered back projection (FBP) and ADMIRE with multiple strength levels. Regions of interest were drawn in the posterior fossa and petrous bone. The average density (in Hounsfield units [HU]) and the image noise (standard deviation of density values) were extracted. The signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) were then calculated. Additionally, a subjective qualitative analysis was performed using a five-point Likert scale. The potential dose reduction was extrapolated from objective analysis and confirmed in an additional phantom study. RESULTS: The image noise was significantly lower, and the SNR and CNR were significantly higher in ADMIRE reconstructions levels A2-A5 than in FBP ( P
Conclusion: FDG-PET/CT findings were shown to be more accurate for assessing MPM recurrence and more often led to therapy change than contrast-enhanced CT. PMID: 31827724 [PubMed]
In this study, we aimed to stress the importance of antrum wall thickness in CT examination. Method: The study included 111 patients between ages of 18 and 95 who had antral wall thickening in computed tomography and also had endoscopic evaluation performed in the same clinic. The patients were divided into two groups as benign and malignant according to the pathology results. The thickness of the antrum wall in computed tomography, hemoglobin and albumin levels, and age was compared among these two groups. Parameters with significant differences were further analyzed by multivariate analysis using logistic regression ...
CONCLUSIONS: Fresh frozen homologous bone seems to have a good healing pattern and to be a successful and steady grafting material for the treatment of maxillary ridge atrophy. It might be considered a valid alternative to autologous bone in sinus floor augmentation procedures. PMID: 31822046 [PubMed - in process]
ConclusionWe showed that BM FDG-positive predicted a poorer survival in patients with advanced stage DBLCL. We also found that BMB-negative and BM FDG-positive patients had similar PFS or OS to BMB-positive and BM FDG-negative patients. Further study in a larger population is needed to clarify clinical significance of BM FDG in these patients.
ConclusionIn Revolution CT, beam hardening artifacts were reduced in reduced-iodine VMI at lower energy levels compared to Discovery CT, contributing to better image quality.
Publication date: December 2019Source: British Journal of Oral and Maxillofacial Surgery, Volume 57, Issue 10Author(s): Sukhpreet Dubb, Stephanie Agar, Janhvi Shah, Paayal Shah, Tahir Mirza
Conclusions: Herniation of TMJ into the EAC is a rare condition, but can be encountered in the clinic at any time. This literature review could be helpful in the diagnosis and treatment of TMJ herniation into the EAC.
Conclusions: Poor cavity obliteration, a high rate of revision surgery and difficult differentiation between recurrent cholesteatoma and granulation tissue in CT scan was observed.
CONCLUSION: Flexible videoureterorrenoscopy and Holmium laser for the management of intrarenal stenosis are highly effective and safe with the advantages of less perioperative complications, less invasiveness and being an outpatient procedure compared to percutaneous surgery. PMID: 31823855 [PubMed - in process]
Conclusion: The development of LRSS pneumatization affects the removal rate of CS tumors in PAs. Preoperative analysis of LRSS development should be considered when planning EES against PA with CS invasion. PMID: 31819816 [PubMed]