Clinical relevance of metal artefact reduction in computed tomography (iMAR) in the pelvic and head and neck region: Multi ‐institutional contouring study of gross tumour volumes and organs at risk on clinical cases

AbstractIntroductionArtefacts caused by dental implants and hip replacements may impede target volume definition and dose calculation accuracy. The iterative metal artefact reduction (iMAR) algorithm can provide a solution for this problem. The present study compares delineation of gross tumour volumes (GTVs) and organs at risk (OARs) in the pelvic and the head and neck (H&N) regions using computed tomography (CT) with and without iMAR, and thus the practical applicability of iMAR for routine clinical use.MethodsThe native planning CT and CT ‐iMAR data of two typical clinical cases with image‐distorting artefacts were used for multi‐institutional contouring and analysis using the Dice similarity coefficient (DSC). GTV/OAR contours were compared with an intraobserver approach and compared to predefined reference structures.ResultsMean volume for GTVprostate in the intraobserver approach decreased from 87  ± 44 cm3 (native CT) to 75  ± 22 cm3 (CT ‐iMAR) (P = 0.168). Compared to the reference, DSC values for GTVProstate increased from 0.68  ± 0.15 to 0.78 ± 0.07 (CT vs. iMAR) (P 
Source: Journal of Medical Imaging and Radiation Oncology - Category: Radiology Authors: Tags: Radiation Oncology —Original Article Source Type: research

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This study compares the rate of bone integrity and bone resorption of the coracoid process, and the clinical outcomes after the Bristow procedure in 61 shoulders and the Latarjet procedure in 44 shoulders with at least one year of follow-up. CT scans showed 98% of bone union of the coracoid process within 3 months after the Latarjet procedure, but only 78% of bone union, 15% of delayed union, and 7 % of fracture of the coracoid in the Bristow procedure, 6 months after surgery.
Source: Journal of Shoulder and Elbow Surgery - Category: Orthopaedics Authors: Source Type: research
CONCLUSIONS Pulmonary hypertension occurred in 25% of the 182 interstitial lung disease patients and was negatively associated with deteriorated lung functions (specifically VC%, FVC%, and DLCO parameters). ANA level was not associated with the prognosis of pulmonary hypertension of patients with interstitial lung disease, and it did not significantly affect the correlation between PASP and pulmonary functions. Thus, ANA level did not seem to be a necessary indicator of pulmonary hypertension, and a more effective treatment method for pulmonary hypertension of patients with interstitial lung disease is urgently needed. ...
Source: Medical Science Monitor - Category: Research Tags: Med Sci Monit Source Type: research
CONCLUSION: Laparoscopic management of hydatid cysts of the liver can be performed safely and successfully. This technique can be used in patients with unique, small sized, superficially located cysts, and also has the advantages of other abdominal laparoscopic operations. KEY WORDS: Hepatic hydatid cysts, Laparoscopic surgery. PMID: 31617852 [PubMed - as supplied by publisher]
Source: Annali Italiani di Chirurgia - Category: Surgery Tags: Ann Ital Chir Source Type: research
AbstractFractional flow reserve (FFR) is an established method for diagnosing physiological coronary artery stenosis. A method for computing FFR using coronary computed tomography (CT) images was recently developed. However, its calculation requires off-site supercomputer analysis. Here, we report the preliminary result of a method using simple estimation of boundary conditions. The lumen boundaries of the coronary arteries were semi-automatically delineated using full width at half maximum of CT number profiles. The computational fluid dynamics (CFD) of the blood flow was performed using the boundary conditions of a fixed...
Source: The International Journal of Cardiovascular Imaging - Category: Radiology Source Type: research
Publication date: Available online 17 October 2019Source: Composites Science and TechnologyAuthor(s): Q.J. Zhang, Y.C. Wang, C.G. Bailey, Oana M. Istrate, Zheling Li, Ian Kinloch, Peter M. BuddAbstractThis paper presents the development and validation of a numerical simulation method using the Lattice Boltzmann Method (LBM) to predict the permeability of epoxy resin (ER) composites with graphene nanoplatelets (GNPs).Gas permeability tests were carried out for a series of GNP/ER nanocomposites with different loadings and diameters of GNPs. The experimental results confirm that inclusion of GNPs in ER significantly decreased...
Source: Composites Science and Technology - Category: Science Source Type: research
ConclusionsCombining Gini coefficient and GIS network analysis in accessibility can be useful in quantifying and monitoring variation by region. We propose this combination as a new method for helping the government to make evidence-based healthcare planning.
Source: Health Policy and Technology - Category: Health Management Source Type: research
AdventHealth opened one freestanding ER in Oviedo this week and is in the progress of completing another one. The $3.36 billion Altamonte Springs-based health care system opened a 19,000-square foot, 24-bed facility at 8100 Red Bug Lake Road near the Oviedo Mall. The ER includes two kid-friendly patient rooms, imaging technology like X-ray, CT scan and ultrasound equipment, as well as a medical laboratory . “AdventHealth has provided Central Florida residents compassionate, whole-person care for…
Source: Health Care:Biotechnology headlines - Category: Biotechnology Authors: Source Type: news
Authors: Cârstocea L, Rusu MC, Pascale C, Săndulescu M Abstract The transantral or ectopic infraorbital canal (IOC) courses diagonally through the maxillary sinus (MS), thereby being exposed to risk during a number of surgical procedures. A few prior reports have presented evidence of a septa-embedded IOC, albeit only on single-plane slices. We identified this extremely rare variation of the IOC during a retrospective study of the cone-beam computed tomography (CBCT) files of two patients. In the first case, which involved a 34-year-old female patient, the canals and septa within the MS were bilaterally asym...
Source: Folia Morphologica - Category: Anatomy Tags: Folia Morphol (Warsz) Source Type: research
Publication date: Available online 17 October 2019Source: Urology Case ReportsAuthor(s): Fumito Yamabe, Hiroshi Aoki, Remi Iwamoto, Yozo Mitsui, Hideyuki Kobayashi, Koichi NakajimaAbstractA 74-year-old male underwent laparoscopic radical cystectomy for invasive bladder cancer with open surgery for lymph node dissection and urinary diversion (ileal conduit). During the surgery, intestinal malrotation was diagnosed and Ladd procedure was performed. Ileal conduit was performed on the left side after considering the course of mesentery. Although a final diagnosis was reached during the surgery in this case, the presence of int...
Source: Urology Case Reports - Category: Urology & Nephrology Source Type: research
Publication date: Available online 16 October 2019Source: Respiratory Medicine Case ReportsAuthor(s): Midori Yamada, Kei Nakashima, Hiroyuki Ito, Masahiro AoshimaAbstractCorticosteroid therapy may not be enough to control pneumonitis in some cases of severe drug-induced lung injury (DLI); however, an advanced treatment strategy for such cases is lacking. Here, we report the case of an 88-year-old man who presented with severe DLI, caused by Sai-rei-to. The patient visited our hospital complaining of progressive dyspnea. High-resolution computed tomography of the chest demonstrated bilateral patchy ground-glass opacities an...
Source: Respiratory Medicine Case Reports - Category: Respiratory Medicine Source Type: research
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