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CT - Springer Nature

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Last Updated: 23 July 2022

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Lung CT Scans Image Compression Using Innovative Transformation Approach

Physicians face difficulties in diagnosing lung cancer due to the complicated nature and clinical interrelations of computer diagnosed scan images. An image depicts visual perception and depicts emotional perception. An image is an artifact that represents visual perception. Image compression software minimizes the amount of data needed to represent an image by removing unnecessary redundant data and minimizes the cost of storage and transmission. Compared to a number of oneu2019s, we are doing image reconstruction, which involves more zeros than ever before compressing an image. Image compression reduces the size in bytes of a graphic file without degrading the image's quality.

Source link: https://doi.org/10.1007/978-981-19-0095-2_19


Direct Iterative Basis Image Reconstruction Based on MAP-EM Algorithm for Spectral CT

In the last decade, Spectral CT has sparked burgeoning academic curiosity. A novel and robust direct iterative base material image reconstruction scheme based on maximum a posteriori goalu2013maximization algorithm is suggested to ensure high accuracy of decomposition and high quality of base images. MAP-EM-DD method can reduce the noise levels of basis images down to 66% and error levels of each material-specific region up to 61% relative to the image domain material decomposition based on the FBP algorithm. MAP-EM-DD technology can reduce the noise levels of basis images down to 23. 6%, the error levels of each material-specific region down to 36. 3%, and the reconstruction time of base images by 14. 1% in comparison to the MAP-EM-DD technique.

Source link: https://doi.org/10.1007/978-3-030-92989-3_10


X-Ray Multispectral CT Imaging by Projection Sequences Blind Separation Based on Basis-Effect or Basis-Material Decomposition

The procedure of projection domain separation can make multispectral CT reconstruction less costly and simpler to implement for multispectral CT. The narrow-spectrum projections can be captured by blind separation of projection sequences with the different X-ray energies, even though the ray spectrum is not known in advance, the narrow-spectrum projections can be reproduced as well. Two projection blind separation techniques of multispectral CT are suggested for obtaining narrow-spectrum projections under limited conditions, such as basis-effect decomposition or base-material decomposition.

Source link: https://doi.org/10.1007/978-3-030-92989-3_9


Multi-material Decomposition (m-MD) Based Spectral Imaging in Photon-Counting CT

The two key spectral imaging in CT employed by either energy conversion or photon-counting detection are material decomposition and virtual monochromatic imaging. With technological advancements in X-ray photon-counting detection, the study and development of photon-counting spectral CT is gaining traction toward clinical use. We present the physical fundamentals of multi-material decomposition based spectral imaging in photon-counting CT, with a focus on the conditioning of base materials and spectral channelization, as well as its effect on the results of spectral imaging in photon-counting CT.

Source link: https://doi.org/10.1007/978-3-030-92989-3_8


Classifying Pulmonary Embolism Cases in Chest CT Scans Using VGG16 and XGBoost

A blood clot becomes trapped in a pulmonary artery and prevents blood from flowing to the lungs in this condition, commonly known as PE. Since determining whether a scan contains an embolus or not is a cumbersome procedure, we suggest a method using VGG16 and XGBoost to determine whether an image contains an embolus or not.

Source link: https://doi.org/10.1007/978-981-19-1844-5_22


Society of Skeletal Radiology– white paper. Guidelines for the diagnostic management of incidental solitary bone lesions on CT and MRI in adults: bone reporting and data system (Bone-RADS)

With four potential diagnostic management recommendations, the Society of Skeletal Radiology's Practice Guidelines and Technical Standards Committee suggests a bone reporting and reporting system for incidentally detecting solitary bone lesions on CT and MRI, as well as expert opinion.

Source link: https://doi.org/10.1007/s00256-022-04022-8


Hybrid CT-angiography (Angio-CT) for combined CT and fluoroscopic procedures in interventional radiology enhances utilization

Methods Interventions The methods used by both CT and fluoroscopy to perform multiple procedures in a single encounter or single intervention using both CT and fluoroscopy were found. Results Between June 2018 and August 2019, Angio-CT system performed 1108 procedures; 10% used both fluoroscopy and CT; 21% used both fluoroscopy and CT. 28 percent Involved more than one procedure in a single encounter that needed a CT-only and fluoroscopy-only bundle therapy. When done via Angio-CT, the most common non-complex bundled case with a significant decrease in T _Room when compared to control. There was a significant decrease in T _Encounter for abdominopelvic drain placement procedures bundled with either percutaneous nephrostomy tube testing with or without replacement, or central venous catheter placement. Conclusion The primary aim of the hybrid Angio-CT device was to solve non-oncologic and non-complex cases with potential decreases in T _Room and T _Encounter for specific non-complex bundle cases.

Source link: https://doi.org/10.1007/s00261-022-03576-4


Robustness of CT radiomics features: consistency within and between single-energy CT and dual-energy CT

Objects Objectives Objectives: To determine inter- and intra- scan mode as well as scanner repeatability and reproducibility of radiomics information within and between single-energy CT and dual-energy CT versus dual-energy CT. The intra-scanner review of SECT 120kVp and DECT 120 kVp-like VMIs showed that 10. 76 percent and 10. 28% of features were with ICC > 0. 90 and CCC > 0. 90, respectively. According to the inter-scanner survey, 17. 0 percent and 27. 73% of features for SECT 120kVp were with CV > 10% and QCD 10%, and 15. 6 percent and 32. 8% for DECT 120 kVp-like VMIs, respectively. U2022 (u2022) Although the test-retest results showed high repeatability for radiomics measurements, the overall reproducibility of radiomics results within and between SECT and DECT was low, with some features such as SECT and DECT lacking. Only about one-tenth of radiomics features extracted from SECT images and corresponding DECT images did match each other, even though their average photon energy levels were identical, indicating that the scan mode may have enhanced the radiomics functionality. u2022.

Source link: https://doi.org/10.1007/s00330-022-08628-3


Performance of digital PET/CT compared with conventional PET/CT in oncologic patients: a prospective comparison study

Purpose Digital PET systems increase lesion detection capability in comparison to PET systems with traditional photomultiplier tubes. We prospectively investigated the results of high-resolution digital PET scans in patients with cancer as compared to high- and standard-resolution conventional PET scans, taking the acquisition date into account. No significant difference in preference was found between the high-resolution cPET and dPET reconstructions, which was found between the first 102, 61, 10 min after FDG administration and cPET was made second, and no significant difference was found between the subgroup of patients where dPET was first made n = 103, 61, and cPET was made second, with a change in preference between the cPET reconstructions p = 0. 41 Conclusions DPET scanners in combination with high-resolution reconstructions outperform cPET scanners with both high- and standard-resolution reconstructions, as the PET readers' interest in finding more FDG-avid lesions, their diagnostic confidence increased, and they visually preferred dPET over dPET scanners.

Source link: https://doi.org/10.1007/s12149-022-01758-0


Childhood cancer risks estimates following CT scans: an update of the French CT cohort study

In recent epidemiological studies, the dangers of central nervous system tumors and leukemia related to computed tomography exposure during childhood have been raised. The patients were followed from the date of their first CT to their date of cohort exclusion, whichever of the following: 31 December 2016, date of death, date of first cancer diagnosis, or date of their 18th birthday. An HR of 1. 05 for CNS tumors, 1. 17 for leukemia, and 0. 96 for lymphoma was estimated in patients without PFs. Conclusions This review found that non-PF patients with CNS tumors and leukemia had statistically significant dose-response relationships for CNS tumors and leukemia. U2022 Computed tomography is the most important contributor to the French population's collective dose of diagnostic imaging. u2022 Computed tomography is the most significant contributor to the collective dose of diagnostic imaging. u2022 The new French CT cohort's study shows statistically significant dose-response relationships for CNS tumors and leukemia.

Source link: https://doi.org/10.1007/s00330-022-08602-z

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions