Radiography registration for mosaic tomography

A hybrid method of stitching X-ray computed tomography (CT) datasets is proposed and the feasibility to apply the scheme in a synchrotron tomography beamline with micrometre resolution is shown. The proposed method enables the field of view of the system to be extended while spatial resolution and experimental setup remain unchanged. The approach relies on taking full tomographic datasets at different positions in a mosaic array and registering the frames using Fourier phase correlation and a residue-based correlation. To ensure correlation correctness, the limits for the shifts are determined from the experimental motor position readouts. The masked correlation image is then minimized to obtain the correct shift. The partial datasets are blended in the sinogram space to be compatible with common CT reconstructors. The feasibility to use the algorithm to blend the partial datasets in projection space is also shown, creating a new single dataset, and standard reconstruction algorithms are used to restore high-resolution slices even with a small number of   projections.
Source: Journal of Synchrotron Radiation - Category: Physics Authors: Tags: computed tomography mosaic tomography microtomography non-limited field of view research papers Source Type: research

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Abstract There is a wide variety of causes of diffuse lung disease in the intensive care unit patient, of which adult respiratory distress syndrome is the commonest clinical consideration. Plain radiography, computed tomography, and ultrasound can be used synergistically to evaluate patients with diffuse lung disease and respiratory impairment. Imaging is not limited to characterization of the cause of diffuse lung disease but also aids in monitoring its evolution and in ventilator setting management. PMID: 31731896 [PubMed - in process]
Source: Radiologic Clinics of North America - Category: Radiology Authors: Tags: Radiol Clin North Am Source Type: research
We present a 48 year-old active duty physician who initially presented in 2007 with dyspnea and cough. Despite the absence of variable obstruction on spirometry, a clinical diagnosis of asthma was made. The patient's symptoms were temporized with inhaled corticosteroids and bronchodilators, titrated to his symptoms, until eventual therapeutic failure resulted in re-referral to pulmonary. Chest computed tomography (CT) showed ground-glass nodules and patchy airspace opacities with evidence of thoracic lymphadenopathy. A positron emission tomography CT (PET CT) showed diffuse adenopathy throughout his thorax and abdomen with...
Source: Respiratory Medicine Case Reports - Category: Respiratory Medicine Source Type: research
CONCLUSIONS: We concluded that both interventions had a similar ability to reduce temporary paresthesia of the IAN after third molar surgery with moderate certainty of evidence. PMID: 31724883 [PubMed - as supplied by publisher]
Source: Dentomaxillofacial Radiology - Category: Radiology Tags: Dentomaxillofac Radiol Source Type: research
Conclusions: For sacrum fractures with minimal or no displacement, slight differences in the VAS were noted within 24 hours after injury or surgery, but limited differences were seen at 3 months for either operatively treated minimally or undisplaced sacrum fractures. It is unknown whether this represents clinical relevance. These differences were below the minimally important clinical difference for VAS scores for other orthopaedic conditions. Level of Evidence: Therapeutic Level II. See Instructions for Authors for a complete description of levels of evidence.
Source: Journal of Orthopaedic Trauma - Category: Orthopaedics Tags: Original Article Source Type: research
Objectives: To evaluate unilateral sacral fractures and compare those treated operatively versus nonoperatively to determine indications for surgery. Design: Prospective, multicenter, observational study. Setting: Sixteen trauma centers. Patients/Participants: Skeletally mature patients with pelvic ring injury and unilateral zone 1 or 2 sacral fractures and without anteroposterior compression injuries. Main Outcome Measurements: Injury plain anteroposterior, inlet, and outlet radiographs and computed tomography scans of the pelvis were evaluated for fracture displacement. Results: Three hundred thirty-thre...
Source: Journal of Orthopaedic Trauma - Category: Orthopaedics Tags: Original Article Source Type: research
Conclusions: Half of patients presenting with a simple spiral TSF have an associated PMF. In one in four patients, these are occult. Additional preoperative CT scan imaging may be considered in patients presenting with simple spiral distal third TSFs, despite negative lateral radiographs, so that PMFs can be identified and managed with “malleolus-first” fixation. Level of Evidence: Diagnostic Level IV. See Instructions for Authors for a complete description of levels of evidence.
Source: Journal of Orthopaedic Trauma - Category: Orthopaedics Tags: Original Article Source Type: research
Study Design. A retrospective cohort, radiographic study. Objective. The aim of this study was to compare the progression of scoliosis owing to single hemivertebra (HV) during early childhood, according to the anteroposterior discordance obtained from the three-dimensional computed tomography (3D-CT) studies. Summary of Background Data. Previous studies have utilized 3D-CT for the classification of congenital spinal deformities and have introduced the concept of two types of deformity: unison and discordant anomalies. However, there have been no further studies on the clinical significance of these discordant defor...
Source: Spine - Category: Orthopaedics Tags: DEFORMITY Source Type: research
This article aims to discuss the role of CT cystography in the evaluation of bladder injuries.
Source: Emergency Radiology - Category: Emergency Medicine Source Type: research
Publication date: Available online 14 November 2019Source: European Journal of RadiologyAuthor(s): Akira Nishiyama, Naoko Kawata, Hajime Yokota, Toshihiko Sugiura, Yosuke Matsumura, Takashi Higashide, Takuro Horikoshi, Shigeto Oda, Koichiro Tatsumi, Takashi UnoABSTRACTPurposeAcute respiratory distress syndrome (ARDS) is an acute inflammatory lung injury that frequently shows fatal outcomes. As radiographic predictive factors, some reports have focused on the region of ill-aerated lung, but none have focused on well-aerated lung. Our objective was to evaluate the relationship between computed tomography (CT) volume of the w...
Source: European Journal of Radiology - Category: Radiology Source Type: research
Abstract Treatment of pilon fractures remains challenging due to the difficulty of fracture reduction and associated soft tissue complications. The aim of this study was to evaluate the pitfalls and strategies of posterior column reduction in the treatment of complex tibial pilon fractures (AO/OTA 43-C3). Thirteen AO/OTA classification 43-C3 type pilon fractures treated between January 2013 and January 2016 were retrospectively analyzed. Nine cases were treated by external fixation within 26 hours (range, 6-56 hours) after injury. The definitive open reduction and internal fixation (ORIF) was performed after the w...
Source: Biomed Res - Category: Research Authors: Tags: Biomed Res Int Source Type: research
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