Translative lens-based full-field coherent X-ray imaging

A full-field coherent imaging approach suitable for hard X-rays based on a classical (i.e. Galilean) X-ray microscope is described. The method combines a series of low-resolution images acquired at different transverse lens positions into a single high-resolution image, overcoming the spatial resolution limit set by the numerical aperture of the objective lens. The optical principles of the approach are described, the successful reconstruction of simulated phantom data is demonstrated, and aspects of the reconstruction are discussed. The authors believe that this approach offers some potential benefits over conventional scanning X-ray ptychography in terms of spatial bandwidth and radiation dose rate.
Source: Journal of Synchrotron Radiation - Category: Physics Authors: Tags: coherence imaging microscopy research papers Source Type: research

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Do I still have a blog? You wouldn’t know it by how infrequently I’ve updated it lately. Sometimes life can overwhelm. When that happens, I like to believe that I will always be plucky enough to fend off the doldrums and shake my fist defiantly at the obstacles that beset me. However, when illness weakens your knees and keeps you motionless in bed, is there enough pluck to lift your fist, never mind keep your spirits up?I ’ve been incredibly sick this Fall. I started my journey on September 7th. I attended FanX in Salt Lake City, had a good time attending with my daughter, then came home and tried to figh...
Source: The Splintered Mind by Douglas Cootey - Category: Psychiatry Tags: Depression Goodreads Journaling Somnambulating Source Type: blogs
The fiercely contested race to demonstrate how artificial intelligence (AI)...Read more on AuntMinnie.comRelated Reading: C-MIMI: AI could cut mammography workload in half AI shows promise for reducing mammography workload AI enhances radiologist performance for DBT Deep learning enhances breast cancer risk assessment SBI: AI improves DBT's performance in dense tissueComments: 12/1/2019 2:21:59 PMHospital-Rad If I were a resident I would think twice before choosing breast fellowship. Although a mammographer won't be replaced by AI completely, I predict that the work volume will decrease dramatically. Screenings...
Source: Headlines - Category: Radiology Source Type: news
CONCLUSIONS: This study demonstrates for the first time that TAT can detect GMH in neonatal mouse cerebrum in vivo. This represents the first important step towards the in vivo diagnosis and grading of hemorrhage in the infant human brain. PMID: 31771088 [PubMed - as supplied by publisher]
Source: Journal of X-Ray Science and Technology - Category: Radiology Tags: J Xray Sci Technol Source Type: research
AbstractPurpose of ReviewCone beam computed tomography scans have been gaining popularity as a diagnostic aid. The purpose of this review is to understand the benefits and the limitations of this technology and its application in day to day clinical assessment. Familiarity with some basic principles of the technical aspect will aid the practitioner in controlling quality of the scan and the amount of radiation the patient is subjected to.Recent FindingsSignificant findings of this review are that the exposure to ionizing radiation is the main limiting factor in taking CBCT scans. The information obtained can be invaluable ...
Source: Current Oral Health Reports - Category: Dentistry Source Type: research
Abstract Metal artifact reduction (MAR) algorithms reduce the errors caused by metal implants in xray computed tomography (CT) images and are an important part of error management in radiotherapy (RT). A promising MAR approach is to leverage the information in magnetic resonance (MR) images that are acquired for organ or tumor delineation. This is however complicated by the ambiguous relationship between CT values and conventional-sequence MR intensities as well as potential co-registration issues. In order to address these issues, this paper proposes a self-tuning Bayesian model for MR-based MAR that combines kno...
Source: Physics in Medicine and Biology - Category: Physics Authors: Tags: Phys Med Biol Source Type: research
CONCLUSIONS Our study, in which no X-ray examination revealed possible intracranial bleeding, clearly shows that nowadays the plain radiograph of the skull does not bring any benefit in the diagnosis of minor traumatic brain injury. Key words:skull X-ray, CT of the head, head injury, minor traumatic brain injury. PMID: 31748109 [PubMed - in process]
Source: Acta Chirurgiae Orthopaedicae et Traumatologiae Cechoslovaca - Category: Orthopaedics Tags: Acta Chir Orthop Traumatol Cech Source Type: research
CONCLUSIONS he diagnostic procedure in a polytrauma patient is not uniform in trauma centres and even the procedure for urgent reporting of crucial WBCT findings to clinical physicians has not been standardised. In a number of cases the indication for WBCT seems to be unnecessary. A more careful consideration of indications for imaging examinations based on the clinical finding may reduce the radiation exposure of patients while maintaining the diagnostic accuracy. A structured report on WBCT in polytrauma is not used even though it is recommended by the European Society of Radiology. Key words:polytrauma, diagnostic imagi...
Source: Acta Chirurgiae Orthopaedicae et Traumatologiae Cechoslovaca - Category: Orthopaedics Tags: Acta Chir Orthop Traumatol Cech Source Type: research
CONCLUSIONS: Our AATR shows the capabilities of adapting to varying types of materials, even the unknown materials which are not available in the training data, adapting to varying required probability of detection and adapting to varying scales of the threat object. PMID: 31744038 [PubMed - as supplied by publisher]
Source: Journal of X-Ray Science and Technology - Category: Radiology Tags: J Xray Sci Technol Source Type: research
Conclusion: Follow up CXRs can lead to new malignant and non-malignant diagnosis both when the radiological changes are persistent and when only partially resolved. Further work is required to risk stratify patients into higher and lower risk groups.
Source: European Respiratory Journal - Category: Respiratory Medicine Authors: Tags: Respiratory infections Source Type: research
Adolescent idiopathic scoliosis (AIS) is a spinal deformity that can affect young children. It requires frequent exposure to X-rays to monitor the deformity, which can lead to the development of radiation-induced cancer later in life. The aim of this study is to test the accuracy of using scan projection radiography (SPR) in computed tomography (CT) scans for AIS assessment. This scanning mode delivers low radiation compared with conventional radiography.
Source: Radiography - Category: Radiology Authors: Source Type: research
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