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In the past, many of the steps involved in the radiotherapy workflow have been heavily reliant on X-ray based anatomical imaging. Incorporating additional imaging modalities in this workflow has been shown to be promising. This includes aiding in generating and modifying a patient’s treatment regimen and also helping determine a patient’s response to treatment. Magnetic resonance imaging (MRI) is one of these modalities which can provide both enhanced soft-tissue anatomical images and supplementary information relating to changes in tissue physiology (which occurs at a faster rate than anatomical changes). Quantitative imaging biomarkers (QIBs), derived from quantitative MRI (qMRI) techniques, are measurable quantities that relate to tissue physiology (e.g., diffusion or perfusion) and thus are of particular interest in radiotherapy. Given these capabilities, there is potential for MRI to replace X-ray imaging in several steps of the radiotherapy workflow. However, until recent ....
Nefeli, a leading provider of cloud management software, today announced its latest enterprise cloud management solution that transforms DevOps processes by cutting effort and time to cloud deployment from months to days., , , , Nefeli increases the repeatability, resiliency, and security of enterprise cloud deployments while empowering the IT operations organization. Enterprises can quickly and easily adopt a mature cloud operations model without needing to crea ....
A number of native Detroiters have asked me what I think about their city so far. The simple answer is that I don t feel qualified to offer much insight yet. I ....
Objectives: The objective of this study was to assess the repeatability of MRI for the purpose of radiotherapy treatment planning by considering the difference in registering MRI to MRI compared to registering CT and MRI. Methods: Fifty patients undergoing radiotherapy planning for gynaecological, prostate, rectal, head and neck and CNS malignancies had a planning CT followed by two T2-weighted MRIs. Anatomical landmarks were contoured on each dataset and the images were rigidly registered. Centre of Mass (COM), Dice Similarity Coefficient (DSC), and Mean Distance to Agreement (MDA) were calculated to assess structure volume and position comparing CT-MRI and MRI-MRI. Results: DSC and MDA demonstrated more consistency in delineated volumes for MRI-MRI than for the CT-MRI comparison. The median DSC values were ≥0.8 for 15 of 46 contoured structures for the CT-MRI comparison and 21 of 23 structures for the MRI-MRI comparison. MDA values were ≤1 mm for 11 of 46 structures for the CT-MR ....